DAQmx Channel Properties

DAQmx - Data Acquisition VIs and Functions

Edition Date: January 2019

Part Number: 370469AP-01

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Use the DAQmx Channel properties to configure virtual channels.

PropertyDescription
Active Channels (if subset) Specifies a virtual channel or list of virtual channels to modify. The virtual channels are within the context of a specific task. NI-DAQmx configures all channels in the task if you do not set this property. Details
Analog Input:Maximum Value Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the device can measure with the current settings. Details
Analog Input:Minimum Value Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the device can measure with the current settings. Details
Analog Input:Custom Scale Name Specifies the name of a custom scale for the channel. Details
Analog Input:Measurement Type Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use. Details
Analog Input:Voltage:Units Specifies the units to use to return voltage measurements from the channel. Details
Analog Input:Voltage:dB Reference Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. Details
Analog Input:Voltage:AC RMS Voltage:Units Specifies the units to use to return voltage RMS measurements from the channel. Details
Analog Input:Temperature:Units Specifies the units to use to return temperature measurements from the channel. Details
Analog Input:Temperature:Thermocouple:Type Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. Details
Analog Input:Temperature:Thermocouple:Scale Type Specifies the method or equation form that the thermocouple scale uses. Details
Analog Input:Temperature:Thermocouple:CJC Source Indicates the source of cold-junction compensation. Details
Analog Input:Temperature:Thermocouple:CJC Value Specifies the temperature of the cold junction if AI.Thrmcpl.CJCSrc is Constant Value. Specify this value in the units of the measurement. Details
Analog Input:Temperature:Thermocouple:CJC Channel Indicates the channel that acquires the temperature of the cold junction if AI.Thrmcpl.CJCSrc is Channel. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius. Details
Analog Input:Temperature:RTD:Type Specifies the type of RTD connected to the channel. Details
Analog Input:Temperature:RTD:R0 Specifies in ohms the sensor resistance at 0 deg C. The Callendar-Van Dusen equation requires this value. Refer to the sensor documentation to determine this value. Details
Analog Input:Temperature:RTD:Custom:A Specifies the 'A' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. Details
Analog Input:Temperature:RTD:Custom:B Specifies the 'B' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. Details
Analog Input:Temperature:RTD:Custom:C Specifies the 'C' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. Details
Analog Input:Temperature:Thermistor:A Specifies the 'A' constant of the Steinhart-Hart thermistor equation. Details
Analog Input:Temperature:Thermistor:B Specifies the 'B' constant of the Steinhart-Hart thermistor equation. Details
Analog Input:Temperature:Thermistor:C Specifies the 'C' constant of the Steinhart-Hart thermistor equation. Details
Analog Input:Temperature:Thermistor:R1 Specifies in ohms the value of the reference resistor for the thermistor if you use voltage excitation. NI-DAQmx ignores this value for current excitation. Details
Analog Input:Temperature:Advanced:Force Read From Channel Specifies whether to read from the channel if it is a cold-junction compensation channel. By default, DAQmx Read does not return data from cold-junction compensation channels. Setting this property to TRUE forces read operations to return the cold-junction compensation channel data with the other channels in the task. Details
Analog Input:Current:Units Specifies the units to use to return current measurements from the channel. Details
Analog Input:Current:AC RMS Current:Units Specifies the units to use to return current RMS measurements from the channel. Details
Analog Input:Strain:Units Specifies the units to use to return strain measurements from the channel. Details
Analog Input:Strain:Force Read From Channel Specifies whether the data is returned by DAQmx Read when set on a raw strain channel that is part of a rosette configuration. Details
Analog Input:Strain:Strain Gage:Gage Factor Specifies the sensitivity of the strain gage. Gage factor relates the change in electrical resistance to the change in strain. Refer to the sensor documentation for this value. Details
Analog Input:Strain:Strain Gage:Poisson Ratio Specifies the ratio of lateral strain to axial strain in the material you are measuring. Details
Analog Input:Strain:Strain Gage:Configuration Specifies the bridge configuration of the strain gages. Details
Analog Input:Rosette Strain Gage:Rosette Type Indicates the type of rosette gage. Details
Analog Input:Rosette Strain Gage:Gage Orientation Specifies gage orientation in degrees with respect to the X axis. Details
Analog Input:Rosette Strain Gage:Strain Channels Indicates the raw strain channels that comprise the strain rosette. Details
Analog Input:Rosette Strain Gage:Rosette Measurement Type Specifies the type of rosette measurement. Details
Analog Input:Resistance:Units Specifies the units to use to return resistance measurements. Details
Analog Input:Frequency:Units Specifies the units to use to return frequency measurements from the channel. Details
Analog Input:Frequency:Voltage:Threshold Level Specifies the voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls. Details
Analog Input:Frequency:Voltage:Hysteresis Specifies in volts a window below AI.Freq.ThreshVoltage. The input voltage must pass below AI.Freq.ThreshVoltage minus this value before NI-DAQmx recognizes a waveform repetition at AI.Freq.ThreshVoltage. Hysteresis can improve the measurement accuracy when the signal contains noise or jitter. Details
Analog Input:Position:LVDT:Units Specifies the units to use to return linear position measurements from the channel. Details
Analog Input:Position:LVDT:Sensitivity Specifies the sensitivity of the LVDT. This value is in the units you specify with AI.LVDT.SensitivityUnits. Refer to the sensor documentation to determine this value. Details
Analog Input:Position:LVDT:Sensitivity Units Specifies the units of AI.LVDT.SensitivityDetails
Analog Input:Position:RVDT:Units Specifies the units to use to return angular position measurements from the channel. Details
Analog Input:Position:RVDT:Sensitivity Specifies the sensitivity of the RVDT. This value is in the units you specify with AI.RVDT.SensitivityUnits. Refer to the sensor documentation to determine this value. Details
Analog Input:Position:RVDT:Sensitivity Units Specifies the units of AI.RVDT.SensitivityDetails
Analog Input:Position:Eddy Current Proximity Probe:Units Specifies the units to use to return proximity measurements from the channel. Details
Analog Input:Position:Eddy Current Proximity Probe:Sensitivity Specifies the sensitivity of the eddy current proximity probe . This value is in the units you specify with AI.EddyCurrentProx.SensitivityUnits. Refer to the sensor documentation to determine this value. Details
Analog Input:Position:Eddy Current Proximity Probe:Sensitivity Units Specifies the units of AI.EddyCurrentProx.SensitivityDetails
Analog Input:Sound Pressure:Maximum Sound Pressure Level Specifies the maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. NI-DAQmx uses the maximum sound pressure level to calculate values in pascals for AI.Max and AI.Min for the channel. Details
Analog Input:Sound Pressure:Units Specifies the units to use to return sound pressure measurements from the channel. Details
Analog Input:Sound Pressure:dB Reference Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. NI-DAQmx also uses the decibel reference level when converting AI.SoundPressure.MaxSoundPressureLvl to a voltage level. Details
Analog Input:Sound Pressure:Microphone:Sensitivity Specifies the sensitivity of the microphone. This value is in mV/Pa. Refer to the sensor documentation to determine this value. Details
Analog Input:Acceleration:Units Specifies the units to use to return acceleration measurements from the channel. Details
Analog Input:Acceleration:dB Reference Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. Details
Analog Input:Acceleration:4 Wire DC Voltage:Sensitivity Specifies the sensitivity of the 4 wire DC voltage acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.4WireDCVoltage.SensitivityUnits. Refer to the sensor documentation to determine this value. Details
Analog Input:Acceleration:4 Wire DC Voltage:Sensitivity Units Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity. Details
Analog Input:Acceleration:Accelerometer:Sensitivity Specifies the sensitivity of the accelerometer. This value is in the units you specify with AI.Accel.SensitivityUnits. Refer to the sensor documentation to determine this value. Details
Analog Input:Acceleration:Accelerometer:Sensitivity Units Specifies the units of AI.Accel.SensitivityDetails
Analog Input:Acceleration:Charge:Sensitivity Specifies the sensitivity of the charge acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.Charge.SensitivityUnits. Refer to the sensor documentation to determine this value. Details
Analog Input:Acceleration:Charge:Sensitivity Units Specifies the units of AI.Accel.Charge.Sensitivity. Details
Analog Input:Velocity:Units Specifies in which unit to return velocity measurements from the channel. Details
Analog Input:Velocity:IEPE Sensor:dB Reference Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. Details
Analog Input:Velocity:IEPE Sensor:Sensitivity Specifies the sensitivity of the IEPE velocity sensor connected to the channel. Specify this value in the unit indicated by AI.Velocity.IEPESensor.SensitivityUnitsDetails
Analog Input:Velocity:IEPE Sensor:Sensitivity Units Specifies the units for AI.Velocity.IEPESensor.SensitivityDetails
Analog Input:Force:Units Specifies in which unit to return force or load measurements from the channel. Details
Analog Input:Force:IEPE Sensor:Sensitivity Specifies the sensitivity of the IEPE force sensor connected to the channel. Specify this value in the unit indicated by AI.Force.IEPESensor.SensitivityUnitsDetails
Analog Input:Force:IEPE Sensor:Sensitivity Units Specifies the units for AI.Force.IEPESensor.SensitivityDetails
Analog Input:Pressure:Units Specifies in which unit to return pressure measurements from the channel. Details
Analog Input:Torque:Units Specifies in which unit to return torque measurements from the channel. Details
Analog Input:Bridge:Units Specifies in which unit to return voltage ratios from the channel. Details
Analog Input:Bridge:Scaling Parameters:Electrical Units Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values. Details
Analog Input:Bridge:Scaling Parameters:Physical Units Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values. Details
Analog Input:Bridge:Scaling Parameters:Scale Type Specifies the scaling type to use when scaling electrical values from the sensor to physical units. Details
Analog Input:Bridge:Scaling Parameters:Two-Point Linear:First:Electrical Value Specifies the first electrical value, corresponding to AI.Bridge.TwoPointLin.First.PhysicalVal. Specify this value in the unit indicated by AI.Bridge.ElectricalUnitsDetails
Analog Input:Bridge:Scaling Parameters:Two-Point Linear:First:Physical Value Specifies the first physical value, corresponding to AI.Bridge.TwoPointLin.First.ElectricalVal. Specify this value in the unit indicated by AI.Bridge.PhysicalUnitsDetails
Analog Input:Bridge:Scaling Parameters:Two-Point Linear:Second:Electrical Value Specifies the second electrical value, corresponding to AI.Bridge.TwoPointLin.Second.PhysicalVal. Specify this value in the unit indicated by AI.Bridge.ElectricalUnitsDetails
Analog Input:Bridge:Scaling Parameters:Two-Point Linear:Second:Physical Value Specifies the second physical value, corresponding to AI.Bridge.TwoPointLin.Second.ElectricalVal. Specify this value in the unit indicated by AI.Bridge.PhysicalUnitsDetails
Analog Input:Bridge:Scaling Parameters:Table:Electrical Values Specifies the array of electrical values that map to the values in AI.Bridge.Table.PhysicalVals. Specify this value in the unit indicated by AI.Bridge.ElectricalUnitsDetails
Analog Input:Bridge:Scaling Parameters:Table:Physical Values Specifies the array of physical values that map to the values in AI.Bridge.Table.ElectricalVals. Specify this value in the unit indicated by AI.Bridge.PhysicalUnitsDetails
Analog Input:Bridge:Scaling Parameters:Polynomial:Forward Coefficients Specifies an array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. Details
Analog Input:Bridge:Scaling Parameters:Polynomial:Reverse Coefficients Specifies an array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. Details
Analog Input:Charge:Units Specifies the units to use to return charge measurements from the channel. Details
Analog Input:TEDS:Is TEDS Indicates if the virtual channel was initialized using a TEDS bitstream from the corresponding physical channel. Details
Analog Input:TEDS:Units Indicates the units defined by TEDS information associated with the channel. Details
Analog Input:General Properties:Input Configuration:Coupling Specifies the coupling for the channel. Details
Analog Input:General Properties:Input Configuration:Impedance Specifies the input impedance of the channel. Details
Analog Input:General Properties:Input Configuration:Terminal Configuration Specifies the terminal configuration for the channel. Details
Analog Input:General Properties:Input Configuration:Input Source Specifies the source of the channel. You can use the signal from the I/O connector or one of several calibration signals. Certain devices have a single calibration signal bus. For these devices, you must specify the same calibration signal for all channels you connect to a calibration signal. Details
Analog Input:General Properties:Signal Conditioning:Resistance Configuration Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD. Details
Analog Input:General Properties:Signal Conditioning:Lead Wire Resistance Specifies in ohms the resistance of the wires that lead to the sensor. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Configuration Specifies the type of Wheatstone bridge connected to the channel. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Nominal Resistance Specifies in ohms the resistance of the bridge while not under load. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Initial Bridge Voltage Specifies in volts the output voltage of the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set AI.Bridge.InitialRatio, NI-DAQmx coerces this property to AI.Bridge.InitialRatio times AI.Excit.ActualVal. This property is set by DAQmx Perform Bridge Offset Nulling Calibration. If you set this property, NI-DAQmx coerces AI.Bridge.InitialRatio to the value of this property divided by AI.Excit.ActualVal. If you set both this property and AI.Bridge.InitialRatio, and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Initial Bridge Ratio Specifies in volts per volt the ratio of output voltage from the bridge to excitation voltage supplied to the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set AI.Bridge.InitialVoltage, NI-DAQmx coerces this property to AI.Bridge.InitialVoltage divided by AI.Excit.ActualVal. If you set this property, NI-DAQmx coerces AI.Bridge.InitialVoltage to the value of this property times AI.Excit.ActualVal. If you set both this property and AI.Bridge.InitialVoltage, and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal Enable Specifies whether to enable a shunt calibration switch. Use AI.Bridge.ShuntCal.Select to select the switch(es) to enable. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal Select Specifies which shunt calibration switch(es) to enable. Use AI.Bridge.ShuntCal.Enable to enable the switch(es) you specify with this property. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal A Source Specifies whether to use internal or external shunt when Shunt Cal A is selected. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Gain Adjustment Specifies the result of a shunt calibration. This property is set by DAQmx Perform Shunt Calibration. NI-DAQmx multiplies data read from the channel by the value of this property. This value should be close to 1.0. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal A Resistor Value Specifies in ohms the desired value of the internal shunt calibration A resistor. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal A Actual Resistor Value Specifies in ohms the actual value of the internal shunt calibration A resistor. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal B Resistor Value Specifies in ohms the desired value of the internal shunt calibration B resistor. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal B Actual Resistor Value Specifies in ohms the actual value of the internal shunt calibration B resistor. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Balance:Coarse Potentiometer Specifies by how much to compensate for offset in the signal. This value can be between 0 and 127. Details
Analog Input:General Properties:Signal Conditioning:Bridge:Balance:Fine Potentiometer Specifies by how much to compensate for offset in the signal. This value can be between 0 and 4095. Details
Analog Input:General Properties:Signal Conditioning:Current Shunt Resistor:Location Specifies the shunt resistor location for current measurements. Details
Analog Input:General Properties:Signal Conditioning:Current Shunt Resistor:Value Specifies in ohms the external shunt resistance for current measurements. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Sense Specifies whether to use local or remote sense to sense excitation. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Source Specifies the source of excitation. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Value Specifies the amount of excitation that the sensor requires. If AI.Excit.VoltageOrCurrent is Voltage, this value is in volts. If AI.Excit.VoltageOrCurrent is Current, this value is in amperes. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Use Excitation For Scaling Specifies if NI-DAQmx divides the measurement by the excitation. You should typically set this property to TRUE for ratiometric transducers. If you set this property to TRUE, set AI.Max and AI.Min to reflect the scaling. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Use Multiplexed Excitation Specifies if the SCXI-1122 multiplexes the excitation to the upper half of the channels as it advances through the scan list. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Actual Excitation Value Specifies the actual amount of excitation supplied by an internal excitation source. If you read an internal excitation source more precisely with an external device, set this property to the value you read. NI-DAQmx ignores this value for external excitation. When performing shunt calibration, some devices set this property automatically. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:DC or AC Specifies if the excitation supply is DC or AC. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Voltage or Current Specifies if the channel uses current or voltage excitation. Details
Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Idle Output Behavior Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit. Details
Analog Input:General Properties:Signal Conditioning:Excitation:AC Excitation:Frequency Specifies the AC excitation frequency in Hertz. Details
Analog Input:General Properties:Signal Conditioning:Excitation:AC Excitation:Synchronization Enable Specifies whether to synchronize the AC excitation source of the channel to that of another channel. Synchronize the excitation sources of multiple channels to use multichannel sensors. Set this property to FALSE for the master channel and to TRUE for the slave channels. Details
Analog Input:General Properties:Signal Conditioning:Excitation:AC Excitation:Wire Mode Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information. Details
Analog Input:General Properties:Signal Conditioning:Sensor Power:Voltage Specifies the voltage level for the sensor's power supply. Details
Analog Input:General Properties:Signal Conditioning:Sensor Power:Configuration Specifies whether to turn on the sensor's power supply or to leave the configuration unchanged. Details
Analog Input:General Properties:Signal Conditioning:Sensor Power:Type Specifies the type of power supplied to the sensor. Details
Analog Input:General Properties:Signal Conditioning:Thermocouple:Open Thermocouple Detection Enable Specifies whether to apply the open thermocouple detection bias voltage to the channel. Changing the value of this property on a channel may require settling time before the data returned is valid. To compensate for this settling time, discard unsettled data or add a delay between committing and starting the task. Refer to your device specifications for the required settling time. When open thermocouple detection is enabled, use OpenThrmcplChansExist to determine if any channels were open. Details
Analog Input:General Properties:Signal Conditioning:Thermocouple:Lead Offset Voltage Specifies the lead offset nulling voltage to subtract from measurements on a device. This property is ignored if open thermocouple detection is disabled. Details
Analog Input:General Properties:Signal Conditioning:Attenuation Specifies the amount of attenuation to use. Details
Analog Input:General Properties:Signal Conditioning:Probe Attenuation Specifies the amount of attenuation provided by the probe connected to the channel. Specify this attenuation as a ratio. Details
Analog Input:General Properties:Filter:Analog Filter:Lowpass:Enable Specifies whether to enable the lowpass filter of the channel. Details
Analog Input:General Properties:Filter:Analog Filter:Lowpass:Cutoff Frequency Specifies the frequency in Hertz that corresponds to the -3dB cutoff of the filter. Details
Analog Input:General Properties:Filter:Analog Filter:Lowpass:Advanced:Switched Capacitor:Clock Source Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details
Analog Input:General Properties:Filter:Analog Filter:Lowpass:Advanced:Switched Capacitor:External Clock Frequency Specifies the frequency of the external clock when you set AI.Lowpass.SwitchCap.ClkSrc to External. NI-DAQmx uses this frequency to set the pre- and post- filters on the SCXI-1141, SCXI-1142, and SCXI-1143. On those devices, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details
Analog Input:General Properties:Filter:Analog Filter:Lowpass:Advanced:Switched Capacitor:External Clock Divisor Specifies the divisor for the external clock when you set AI.Lowpass.SwitchCap.ClkSrc to External. On the SCXI-1141, SCXI-1142, and SCXI-1143, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details
Analog Input:General Properties:Filter:Analog Filter:Lowpass:Advanced:Switched Capacitor:Output Clock Divisor Specifies the divisor for the output clock. NI-DAQmx uses the cutoff frequency to determine the output clock frequency. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details
Analog Input:General Properties:Filter:Digital Filter:Enable Specifies whether the digital filter is enabled or disabled. Details
Analog Input:General Properties:Filter:Digital Filter:Type Specifies the digital filter type. Details
Analog Input:General Properties:Filter:Digital Filter:Response Specifies the digital filter response. Details
Analog Input:General Properties:Filter:Digital Filter:Order Specifies the order of the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Lowpass:Cutoff Frequency Specifies the lowpass cutoff frequency of the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Highpass:Cutoff Frequency Specifies the highpass cutoff frequency of the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Bandpass:Center Frequency Specifies the center frequency of the passband for the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Bandpass:Width Specifies the width of the passband centered around the center frequency for the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Notch:Center Frequency Specifies the center frequency of the stopband for the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Notch:Width Specifies the width of the stopband centered around the center frequency for the digital filter. Details
Analog Input:General Properties:Filter:Digital Filter:Advanced:Coefficients Specifies the digital filter coefficients. Details
Analog Input:General Properties:Filter:Enable Specifies the corresponding filter enable/disable state. Details
Analog Input:General Properties:Filter:Frequency Specifies the corresponding filter frequency (cutoff or center) of the filter response. Details
Analog Input:General Properties:Filter:Response Specifies the corresponding filter response and defines the shape of the filter response. Details
Analog Input:General Properties:Filter:Order Specifies the corresponding filter order and defines the slope of the filter response. Details
Analog Input:General Properties:Filter:Filter Delay Indicates the amount of time between when the ADC samples data and when the sample is read by the host device. This value is in the units you specify with AI.FilterDelayUnits. You can adjust this amount of time using AI.FilterDelayAdjustmentDetails
Analog Input:General Properties:Filter:Filter Delay Units Specifies the units of AI.FilterDelay and AI.FilterDelayAdjustmentDetails
Analog Input:General Properties:Filter:Remove Filter Delay Specifies if filter delay removal is enabled on the device. Details
Analog Input:General Properties:Filter:Filter Delay Adjustment Specifies the amount of filter delay that gets removed if AI.RemoveFilterDelay is enabled. This delay adjustment is in addition to the value indicated by AI.FilterDelay. This delay adjustment is in the units you specify with AI.FilterDelayUnitsDetails
Analog Input:General Properties:Filter:Averaging Window Size Specifies the number of samples to average while acquiring data. Increasing the number of samples to average reduces noise in your measurement. Details
Analog Input:General Properties:Digitizer/ADC:Resolution Units Indicates the units of AI.ResolutionDetails
Analog Input:General Properties:Digitizer/ADC:Resolution Value Indicates the resolution of the analog-to-digital converter of the channel. This value is in the units you specify with AI.ResolutionUnitsDetails
Analog Input:General Properties:Digitizer/ADC:Raw Sample Size Indicates in bits the size of a raw sample from the device. Details
Analog Input:General Properties:Digitizer/ADC:Raw Sample Justification Indicates the justification of a raw sample from the device. Details
Analog Input:General Properties:Digitizer/ADC:Timing Mode Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for AIConv.Rate. You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task. Details
Analog Input:General Properties:Digitizer/ADC:Custom Timing Mode Specifies the timing mode of the ADC when AI.ADCTimingMode is Custom. Details
Analog Input:General Properties:Digitizer/ADC:Dither:Enable Specifies whether to enable dithering. Dithering adds Gaussian noise to the input signal. You can use dithering to achieve higher resolution measurements by over sampling the input signal and averaging the results. Details
Analog Input:General Properties:Channel Calibration:Has Valid Calibration Information Indicates if the channel has calibration information. Details
Analog Input:General Properties:Channel Calibration:Enable Calibration Specifies whether to enable the channel calibration associated with the channel. Details
Analog Input:General Properties:Channel Calibration:Apply Calibration If Expired Specifies whether to apply the channel calibration to the channel after the expiration date has passed. Details
Analog Input:General Properties:Channel Calibration:Calibration Date Specifies the last date and time that the channel underwent a channel calibration. Details
Analog Input:General Properties:Channel Calibration:Expiration Date Specifies the date and time that the channel calibration expires. Details
Analog Input:General Properties:Channel Calibration:Scaling Parameters:Scale Type Specifies the method or equation form that the calibration scale uses. Details
Analog Input:General Properties:Channel Calibration:Scaling Parameters:Table:Pre-Scaled Values Specifies the reference values collected when calibrating the channel. Details
Analog Input:General Properties:Channel Calibration:Scaling Parameters:Table:Scaled Values Specifies the acquired values collected when calibrating the channel. Details
Analog Input:General Properties:Channel Calibration:Scaling Parameters:Polynomial:Forward Coefficients Specifies the forward polynomial values used for calibrating the channel. Details
Analog Input:General Properties:Channel Calibration:Scaling Parameters:Polynomial:Reverse Coefficients Specifies the reverse polynomial values used for calibrating the channel. Details
Analog Input:General Properties:Channel Calibration:Operator Name Specifies the name of the operator who performed the channel calibration. Details
Analog Input:General Properties:Channel Calibration:Description Specifies the description entered for the calibration of the channel. Details
Analog Input:General Properties:Channel Calibration:Verification:Reference Values Specifies the reference values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. Details
Analog Input:General Properties:Channel Calibration:Verification:Acquired Values Specifies the acquired values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. Details
Analog Input:General Properties:Advanced:Range:High Specifies the upper limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details
Analog Input:General Properties:Advanced:Range:Low Specifies the lower limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details
Analog Input:General Properties:Advanced:DC Offset Specifies the DC value to add to the input range of the device. Use AI.Rng.High and AI.Rng.Low to specify the input range. This offset is in the native units of the device . Details
Analog Input:General Properties:Advanced:Gain Specifies a gain factor to apply to the channel. Details
Analog Input:General Properties:Advanced:Sample and Hold Enable Specifies whether to enable the sample and hold circuitry of the device. When you disable sample and hold circuitry, a small voltage offset might be introduced into the signal. You can eliminate this offset by using AI.AutoZeroMode to perform an auto zero on the channel. Details
Analog Input:General Properties:Advanced:High Accuracy Settings:Auto Zero Mode Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample. Details
Analog Input:General Properties:Advanced:High Accuracy Settings:Chop:Enable Specifies whether the device will chop its inputs. Chopping removes offset voltages and other low frequency errors. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Maximum Rate Specifies the rate in B/s to transfer data from the device. If this value is not set, then the device will transfer data at a rate based on the bus detected. Modify this value to affect performance under different combinations of operating system, configuration, and device. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism Specifies the data transfer mode for the device. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Custom Threshold Specifies the number of samples that must be in the FIFO to transfer data from the device if AI.DataXferReqCond is Onboard Memory Custom Threshold. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Size Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Count Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Compression:Raw Data Compression Type Specifies the type of compression to apply to raw samples returned from the device. Details
Analog Input:General Properties:Advanced:Data Transfer and Memory:Compression:Lossy LSB Removal:Compressed Sample Size Specifies the number of bits to return in a raw sample when AI.RawDataCompressionType is set to Lossy LSB Removal. Details
Analog Input:General Properties:Advanced:Device Scaling Coefficients:Device Scaling Coefficients Indicates the coefficients of a polynomial equation that NI-DAQmx uses to scale values from the native format of the device to volts. Each element of the array corresponds to a term of the equation. For example, if index two of the array is 4, the third term of the equation is 4x^2. Scaling coefficients do not account for any custom scales or sensors contained by the channel. Details
Analog Input:General Properties:Advanced:Enhanced Alias Rejection Enable Specifies whether to enable enhanced alias rejection. Leave this property set to the default value for most applications. Details
Analog Input:General Properties:Advanced:Open Channel Detection Enable Specifies whether to enable open channel detection. Details
Analog Output:Maximum Value Specifies the maximum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value larger than the maximum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a smaller value if other task settings restrict the device from generating the desired maximum. Details
Analog Output:Minimum Value Specifies the minimum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value smaller than the minimum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a larger value if other task settings restrict the device from generating the desired minimum. Details
Analog Output:Custom Scale Name Specifies the name of a custom scale for the channel. Details
Analog Output:Output Type Indicates whether the channel generates voltage, current, or a waveform. Details
Analog Output:Voltage:Units Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select. Details
Analog Output:Voltage:Current Limit Specifies the current limit, in amperes, for the voltage channel. Details
Analog Output:Current:Units Specifies in what units to generate current on the channel. Write data to the channel in the units you select. Details
Analog Output:Function Generation:Type Specifies the kind of the waveform to generate. Details
Analog Output:Function Generation:Frequency Specifies the frequency of the waveform to generate in hertz. Details
Analog Output:Function Generation:Amplitude Specifies the zero-to-peak amplitude of the waveform to generate in volts. Zero and negative values are valid. Details
Analog Output:Function Generation:Offset Specifies the voltage offset of the waveform to generate. Details
Analog Output:Function Generation:Square:DutyCycle Specifies the square wave duty cycle of the waveform to generate. Details
Analog Output:Function Generation:Modulation:Type Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal. Details
Analog Output:Function Generation:Modulation:FM Deviation Specifies the FM deviation in hertz per volt when AO.FuncGen.ModulationType is FM. Details
Analog Output:General Properties:Output Configuration:Output Impedance Specifies in ohms the impedance of the analog output stage of the device. Details
Analog Output:General Properties:Output Configuration:Load Impedance Specifies in ohms the load impedance connected to the analog output channel. Details
Analog Output:General Properties:Output Configuration:Idle Output Behavior Specifies the state of the channel when no generation is in progress. Details
Analog Output:General Properties:Output Configuration:Terminal Configuration Specifies the terminal configuration of the channel. Details
Analog Output:General Properties:DAC:Resolution Units Specifies the units of AO.ResolutionDetails
Analog Output:General Properties:DAC:Resolution Value Indicates the resolution of the digital-to-analog converter of the channel. This value is in the units you specify with AO.ResolutionUnitsDetails
Analog Output:General Properties:DAC:Range:High Specifies the upper limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details
Analog Output:General Properties:DAC:Range:Low Specifies the lower limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details
Analog Output:General Properties:DAC:Reference Voltage:Connect DAC Reference to Ground Specifies whether to ground the internal DAC reference. Grounding the internal DAC reference has the effect of grounding all analog output channels and stopping waveform generation across all analog output channels regardless of whether the channels belong to the current task. You can ground the internal DAC reference only when AO.DAC.Ref.Src is Internal and AO.DAC.Ref.AllowConnToGnd is TRUE. Details
Analog Output:General Properties:DAC:Reference Voltage:Allow Connecting DAC Reference to Ground at Runtime Specifies whether to allow grounding the internal DAC reference at run time. You must set this property to TRUE and set AO.DAC.Ref.Src to Internal before you can set AO.DAC.Ref.ConnToGnd to TRUE. Details
Analog Output:General Properties:DAC:Reference Voltage:Source Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC. Details
Analog Output:General Properties:DAC:Reference Voltage:External Source Specifies the source of the DAC reference voltage if AO.DAC.Ref.Src is External. The valid sources for this signal vary by device. Details
Analog Output:General Properties:DAC:Reference Voltage:Value Specifies in volts the value of the DAC reference voltage. This voltage determines the full-scale range of the DAC. Smaller reference voltages result in smaller ranges, but increased resolution. Details
Analog Output:General Properties:DAC:Offset Voltage:Source Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC. Details
Analog Output:General Properties:DAC:Offset Voltage:External Source Specifies the source of the DAC offset voltage if AO.DAC.Offset.Src is External. The valid sources for this signal vary by device. Details
Analog Output:General Properties:DAC:Offset Voltage:Value Specifies in volts the value of the DAC offset voltage. To achieve best accuracy, the DAC offset value should be hand calibrated. Details
Analog Output:General Properties:DAC:Reglitching Enable Specifies whether to enable reglitching. The output of a DAC normally glitches whenever the DAC is updated with a new value. The amount of glitching differs from code to code and is generally largest at major code transitions. Reglitching generates uniform glitch energy at each code transition and provides for more uniform glitches. Uniform glitch energy makes it easier to filter out the noise introduced from glitching during spectrum analysis. Details
Analog Output:General Properties:Filter:Filter Delay Specifies the amount of time between when the sample is written by the host device and when the sample is output by the DAC. This value is in the units you specify with AO.FilterDelayUnitsDetails
Analog Output:General Properties:Filter:Filter Delay Units Specifies the units of AO.FilterDelay and AO.FilterDelayAdjustmentDetails
Analog Output:General Properties:Filter:Filter Delay Adjustment Specifies an additional amount of time to wait between when the sample is written by the host device and when the sample is output by the DAC. This delay adjustment is in addition to the value indicated by AO.FilterDelay. This delay adjustment is in the units you specify with AO.FilterDelayUnitsDetails
Analog Output:General Properties:Advanced:Gain:Gain Value Specifies in decibels the gain factor to apply to the channel. Details
Analog Output:General Properties:Advanced:Data Transfer and Memory:Use Only Onboard Memory Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs. Details
Analog Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism Specifies the data transfer mode for the device. Details
Analog Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Details
Analog Output:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Size Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. Details
Analog Output:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Count Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. Details
Analog Output:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. Details
Analog Output:General Properties:Advanced:Device Scaling Coefficients:Device Scaling Coefficients Indicates the coefficients of a linear equation that NI-DAQmx uses to scale values from a voltage to the native format of the device. Each element of the array corresponds to a term of the equation. The first element of the array corresponds to the y-intercept, and the second element corresponds to the slope. Scaling coefficients do not account for any custom scales that may be applied to the channel. Details
Analog Output:General Properties:Advanced:Enhanced Image Rejection Enable Specifies whether to enable the DAC interpolation filter. Disable the interpolation filter to improve DAC signal-to-noise ratio at the expense of degraded image rejection. Details
Digital Input:Invert Lines Specifies whether to invert the lines in the channel. If you set this property to TRUE, the lines are at high logic when off and at low logic when on. Details
Digital Input:Number of Lines Indicates the number of digital lines in the channel. Details
Digital Input:Digital Filter:Enable Specifies whether to enable the digital filter for the line(s) or port(s). You can enable the filter on a line-by-line basis. You do not have to enable the filter for all lines in a channel. Details
Digital Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes as a valid high or low state transition. Details
Digital Input:Digital Filter:Enable Bus Mode Specifies whether to enable bus mode for digital filtering. If you set this property to TRUE, NI-DAQmx treats all lines that use common filtering settings as a bus. If any line in the bus has jitter, all lines in the bus hold state until the entire bus stabilizes, or until 2 times the minimum pulse width elapses. If you set this property to FALSE, NI-DAQmx filters all lines individually. Jitter in one line does not affect other lines. Details
Digital Input:Digital Filter:Timebase:Source Specifies the terminal of the signal to use as the timebase of the digital filter. Details
Digital Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Digital Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Digital Input:Tristate Specifies whether to tristate the lines in the channel. If you set this property to TRUE, NI-DAQmx tristates the lines in the channel. If you set this property to FALSE, NI-DAQmx does not modify the configuration of the lines even if the lines were previously tristated. Set this property to FALSE to read lines in other tasks or to read output-only lines. Details
Digital Input:Logic Family Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. Details
Digital Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism Specifies the data transfer mode for the device. Details
Digital Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Details
Digital Input:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Size Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. Details
Digital Input:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Count Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. Details
Digital Input:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. Details
Digital Input:General Properties:Advanced:Acquire On Specifies on which edge of the sample clock to acquire samples. Details
Digital Output:Output Drive Type Specifies the drive type for digital output channels. Details
Digital Output:Invert Lines Specifies whether to invert the lines in the channel. If you set this property to TRUE, the lines are at high logic when off and at low logic when on. Details
Digital Output:Number of Lines Indicates the number of digital lines in the channel. Details
Digital Output:Tristate Specifies whether to stop driving the channel and set it to a high-impedance state. You must commit the task for this setting to take effect. Details
Digital Output:Line States:Start State Specifies the state of the lines in a digital output task when the task starts. Details
Digital Output:Line States:Paused State Specifies the state of the lines in a digital output task when the task pauses. Details
Digital Output:Line States:Done State Specifies the state of the lines in a digital output task when the task completes execution. Details
Digital Output:Logic Family Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. Details
Digital Output:Overcurrent:Current Limit Specifies the current threshold in Amperes for the channel. A value of 0 means the channel observes no limit. Devices can monitor only a finite number of current thresholds simultaneously. If you attempt to monitor additional thresholds, NI-DAQmx returns an error. Details
Digital Output:Overcurrent:Automatic Re-enable Specifies whether to automatically reenable channels after they no longer exceed the current limit specified by DO.Overcurrent.LimitDetails
Digital Output:Overcurrent:Re-enable Period Specifies the delay in seconds between the time a channel no longer exceeds the current limit and the reactivation of that channel, if DO.Overcurrent.AutoReenable is TRUE. Details
Digital Output:General Properties:Advanced:Data Transfer and Memory:Use Only Onboard Memory Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory after you start the task. Onboard memory includes data FIFOs. Details
Digital Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism Specifies the data transfer mode for the device. Details
Digital Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Details
Digital Output:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Size Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. Details
Digital Output:General Properties:Advanced:Data Transfer and Memory:USB Transfer Request Count Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. Details
Digital Output:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. Details
Digital Output:General Properties:Advanced:Generate On Specifies on which edge of the sample clock to generate samples. Details
Counter Input:Maximum Value Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the hardware can measure with the current settings. Details
Counter Input:Minimum Value Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the hardware can measure with the current settings. Details
Counter Input:Custom Scale Name Specifies the name of a custom scale for the channel. Details
Counter Input:Measurement Type Indicates the measurement to take with the channel. Details
Counter Input:Frequency:Units Specifies the units to use to return frequency measurements. Details
Counter Input:Frequency:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Frequency:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Frequency:Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Frequency:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Frequency:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Frequency:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Frequency:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Frequency:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Frequency:Starting Edge Specifies between which edges to measure the frequency of the signal. Details
Counter Input:Frequency:Measurement Specifications:Method Specifies the method to use to measure the frequency of the signal. Details
Counter Input:Frequency:Measurement Specifications:Enable Averaging Specifies whether to enable averaging mode for Sample Clock-timed frequency measurements. Details
Counter Input:Frequency:Measurement Specifications:High Frequency:Measurement Time Specifies in seconds the length of time to measure the frequency of the signal if CI.Freq.MeasMeth is High Frequency with 2 Counters. Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement. Details
Counter Input:Frequency:Measurement Specifications:Large Range:Divisor Specifies the value by which to divide the input signal if CI.Freq.MeasMeth is Large Range with 2 Counters. The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement. Details
Counter Input:Period:Units Specifies the unit to use to return period measurements. Details
Counter Input:Period:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Period:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Period:Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Period:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Period:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Period:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Period:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Period:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Period:Starting Edge Specifies between which edges to measure the period of the signal. Details
Counter Input:Period:Measurement Specifications:Method Specifies the method to use to measure the period of the signal. Details
Counter Input:Period:Measurement Specifications:Enable Averaging Specifies whether to enable averaging mode for Sample Clock-timed period measurements. Details
Counter Input:Period:Measurement Specifications:High Frequency:Measurement Time Specifies in seconds the length of time to measure the period of the signal if CI.Period.MeasMeth is High Frequency with 2 Counters. Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement. Details
Counter Input:Period:Measurement Specifications:Large Range:Divisor Specifies the value by which to divide the input signal if CI.Period.MeasMeth is Large Range with 2 Counters. The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement. Details
Counter Input:Count Edges:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Count Edges:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Count Edges:Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Count Edges:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Count Edges:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Count Edges:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Count Edges:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Count Edges:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Count Edges:Count Direction:Direction Specifies whether to increment or decrement the counter on each edge. Details
Counter Input:Count Edges:Count Direction:Input:Terminal Specifies the source terminal of the digital signal that controls the count direction if CI.CountEdges.Dir is Externally Controlled. Details
Counter Input:Count Edges:Count Direction:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Count Edges:Count Direction:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Count Edges:Count Direction:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Count Edges:Count Direction:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Count Edges:Count Direction:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Count Edges:Count Direction:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Count Edges:Count Direction:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Count Edges:Initial Count Specifies the starting value from which to count. Details
Counter Input:Count Edges:Active Edge Specifies on which edges to increment or decrement the counter. Details
Counter Input:Count Edges:Count Reset:Enable Specifies whether to reset the count on the active edge specified with CI.CountEdges.CountReset.TermDetails
Counter Input:Count Edges:Count Reset:Reset Count Specifies the value to reset the count to. Details
Counter Input:Count Edges:Count Reset:Input:Terminal Specifies the input terminal of the signal to reset the count. Details
Counter Input:Count Edges:Count Reset:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Count Edges:Count Reset:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Count Edges:Count Reset:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Count Edges:Count Reset:Input:Digital Filter:Minimum Pulse Width Specifies the minimum pulse width the filter recognizes. Details
Counter Input:Count Edges:Count Reset:Input:Digital Filter:Timebase:Source Specifies the input of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Count Edges:Count Reset:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Count Edges:Count Reset:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Count Edges:Count Reset:Active Edge Specifies on which edge of the signal to reset the count. Details
Counter Input:Count Edges:Gate:Enable Specifies whether to enable the functionality to gate the counter input signal for a count edges measurement. Details
Counter Input:Count Edges:Gate:Input:Terminal Specifies the gate terminal. Details
Counter Input:Count Edges:Gate:Input:Terminal Configuration Specifies the gate terminal configuration. Details
Counter Input:Count Edges:Gate:Input:Logic Level Behavior Specifies the logic level behavior on the gate input line. Details
Counter Input:Count Edges:Gate:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the gate input signal. Details
Counter Input:Count Edges:Gate:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the digital filter recognizes. Details
Counter Input:Count Edges:Gate:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Count Edges:Gate:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Count Edges:Gate:Pause When Specifies whether the counter gates input pulses while the signal is high or low. Details
Counter Input:Duty Cycle:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Duty Cycle:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Duty Cycle:Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Duty Cycle:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Duty Cycle:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the digital filter recognizes. Details
Counter Input:Duty Cycle:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Duty Cycle:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Duty Cycle:StartingEdge Specifies which edge of the input signal to begin the duty cycle measurement. Details
Counter Input:Position:Angular Encoder:Units Specifies the units to use to return angular position measurements from the channel. Details
Counter Input:Position:Angular Encoder:Pulses Per Revolution Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Details
Counter Input:Position:Angular Encoder:Initial Angle Specifies the starting angle of the encoder. This value is in the units you specify with CI.AngEncoder.UnitsDetails
Counter Input:Position:Linear Encoder:Units Specifies the units to use to return linear encoder measurements from the channel. Details
Counter Input:Position:Linear Encoder:Distance Per Pulse Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify with CI.LinEncoder.UnitsDetails
Counter Input:Position:Linear Encoder:Initial Position Specifies the position of the encoder when the measurement begins. This value is in the units you specify with CI.LinEncoder.UnitsDetails
Counter Input:Position:Decoding Type Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only. Details
Counter Input:Position:A Input:Terminal Specifies the terminal to which signal A is connected. Details
Counter Input:Position:A Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Position:A Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Position:A Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Position:A Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Position:A Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Position:A Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Position:A Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Position:B Input:Terminal Specifies the terminal to which signal B is connected. Details
Counter Input:Position:B Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Position:B Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Position:B Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Position:B Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Position:B Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Position:B Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Position:B Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Position:Z Input:Terminal Specifies the terminal to which signal Z is connected. Details
Counter Input:Position:Z Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Position:Z Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Position:Z Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Position:Z Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Position:Z Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Position:Z Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Position:Z Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Position:Z Index Enable Specifies whether to use Z indexing for the channel. Details
Counter Input:Position:Z Index Value Specifies the value to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with CI.Encoder.ZIndexPhase. Specify this value in the units of the measurement. Details
Counter Input:Position:Z Index Phase Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than A High B High. Details
Counter Input:Pulse Width:Units Specifies the units to use to return pulse width measurements. Details
Counter Input:Pulse Width:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Pulse Width:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Pulse Width:Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Pulse Width:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Pulse Width:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Pulse Width:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Pulse Width:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Pulse Width:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Pulse Width:Starting Edge Specifies on which edge of the input signal to begin each pulse width measurement. Details
Counter Input:Timestamp:Units Specifies the units to use to return timestamp measurements. Details
Counter Input:Timestamp:Initial Seconds Specifies the number of seconds that elapsed since the beginning of the current year. This value is ignored if CI.GPS.SyncMethod is IRIG-B. Details
Counter Input:Timestamp:GPS:Synchronization Method Specifies the method to use to synchronize the counter to a GPS receiver. Details
Counter Input:Timestamp:GPS:Synchronization Source Specifies the terminal to which the GPS synchronization signal is connected. Details
Counter Input:Velocity:Angular Encoder:Units Specifies the units to use to return angular velocity counter measurements. Details
Counter Input:Velocity:Angular Encoder:Pulses Per Revolution Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Details
Counter Input:Velocity:Linear Encoder:Units Specifies the units to use to return linear encoder velocity measurements from the channel. Details
Counter Input:Velocity:Linear Encoder:Distance per Pulse Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify in CI.Velocity.LinEncoder.DistUnits. Details
Counter Input:Velocity:Decoding Type Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only. Details
Counter Input:Velocity:A Input:Terminal Specifies the terminal to which signal A is connected. Details
Counter Input:Velocity:A Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Velocity:A Input:Logic Level Behavior Specifies the logic level behavior of the input terminal. Details
Counter Input:Velocity:A Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Velocity:A Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the digital filter recognizes. Details
Counter Input:Velocity:A Input:Digital Filter:Timebase Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Velocity:A Input:Digital Filter:Timebase Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Velocity:B Input:Terminal Specifies the terminal to which signal B is connected. Details
Counter Input:Velocity:B Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Velocity:B Input:Logic Level Behavior Specifies the logic level behavior of the input terminal. Details
Counter Input:Velocity:B Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Velocity:B Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the digital filter recognizes. Details
Counter Input:Velocity:B Input:Digital Filter:Timebase Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Velocity:B Input:Digital Filter:Timebase Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Velocity:Advanced:Measurement Time Specifies in seconds the length of time to measure the velocity of the signal. Details
Counter Input:Velocity:Advanced:Divisor Specifies the value by which to divide the input signal. Details
Counter Input:Two Edge Separation:Units Specifies the units to use to return two-edge separation measurements from the channel. Details
Counter Input:Two Edge Separation:First:Input:Terminal Specifies the source terminal of the digital signal that starts each measurement. Details
Counter Input:Two Edge Separation:First:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Two Edge Separation:First:Input:Logic Level Behavior Specifies the logic level behavior on the input line. Details
Counter Input:Two Edge Separation:First:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Two Edge Separation:First:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Two Edge Separation:First:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Two Edge Separation:First:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Two Edge Separation:First:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Two Edge Separation:First:Edge Specifies on which edge of the first signal to start each measurement. Details
Counter Input:Two Edge Separation:Second:Input:Terminal Specifies the source terminal of the digital signal that stops each measurement. Details
Counter Input:Two Edge Separation:Second:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Two Edge Separation:Second:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Two Edge Separation:Second:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Two Edge Separation:Second:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Two Edge Separation:Second:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Two Edge Separation:Second:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Two Edge Separation:Second:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Two Edge Separation:Second:Edge Specifies on which edge of the second signal to stop each measurement. Details
Counter Input:Semi-Period:Units Specifies the units to use to return semi-period measurements. Details
Counter Input:Semi-Period:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Semi-Period:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Semi-Period:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Semi-Period:Input:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:Semi-Period:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Semi-Period:Input:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:Semi-Period:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Semi-Period:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Semi-Period:Starting Edge Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge. Details
Counter Input:Pulse:Frequency:Units Specifies the units to use to return pulse specifications in terms of frequency. Details
Counter Input:Pulse:Frequency:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Pulse:Frequency:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Pulse:Frequency:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Pulse:Frequency:Input:Digital Filter:Enable Specifies whether to apply a digital filter to the signal to measure. Details
Counter Input:Pulse:Frequency:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Pulse:Frequency:Input:Digital Filter:Timebase:Source Specifies the terminal of the signal to use as the timebase of the digital filter. Details
Counter Input:Pulse:Frequency:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Pulse:Frequency:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Pulse:Frequency:Starting Edge Specifies on which edge of the input signal to begin pulse measurement. Details
Counter Input:Pulse:Time:Units Specifies the units to use to return pulse specifications in terms of high time and low time. Details
Counter Input:Pulse:Time:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Pulse:Time:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Pulse:Time:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Pulse:Time:Input:Digital Filter:Enable Specifies whether to apply a digital filter to the signal to measure. Details
Counter Input:Pulse:Time:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Pulse:Time:Input:Digital Filter:Timebase:Source Specifies the terminal of the signal to use as the timebase of the digital filter. Details
Counter Input:Pulse:Time:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Pulse:Time:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Pulse:Time:Starting Edge Specifies on which edge of the input signal to begin pulse measurement. Details
Counter Input:Pulse:Ticks:Input:Terminal Specifies the input terminal of the signal to measure. Details
Counter Input:Pulse:Ticks:Input:Terminal Configuration Specifies the input terminal configuration. Details
Counter Input:Pulse:Ticks:Input:Logic Level Behavior Specifies the logic level behavior on the count reset line. Details
Counter Input:Pulse:Ticks:Input:Digital Filter:Enable Specifies whether to apply a digital filter to the signal to measure. Details
Counter Input:Pulse:Ticks:Input:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:Pulse:Ticks:Input:Digital Filter:Timebase:Source Specifies the terminal of the signal to use as the timebase of the digital filter. Details
Counter Input:Pulse:Ticks:Input:Digital Filter:Timebase:Rate Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:Pulse:Ticks:Input:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:Pulse:Ticks:Starting Edge Specifies on which edge of the input signal to begin pulse measurement. Details
Counter Input:General Properties:Counter Timebase:Source Specifies the terminal of the timebase to use for the counter. Details
Counter Input:General Properties:Counter Timebase:Rate Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to take measurements in terms of time or frequency rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can take measurements only in terms of ticks of the timebase. Details
Counter Input:General Properties:Counter Timebase:Active Edge Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. Details
Counter Input:General Properties:Counter Timebase:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Input:General Properties:Counter Timebase:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Input:General Properties:Counter Timebase:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Input:General Properties:Counter Timebase:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Input:General Properties:Counter Timebase:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Input:General Properties:Input Configuration:Voltage Threshold Level Specifies the digital threshold value in Volts for high and low input transitions. Some devices do not support this for differential channels. Details
Counter Input:General Properties:More:Count Indicates the current value of the count register. Details
Counter Input:General Properties:More:Output State Indicates the current state of the out terminal of the counter. Details
Counter Input:General Properties:More:Terminal Count Reached Indicates whether the counter rolled over. When you query this property, NI-DAQmx resets it to FALSE. Details
Counter Input:General Properties:More:Counter Timebase Master Timebase Divisor Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to measure slower signals without causing the count register to roll over. Details
Counter Input:General Properties:More:Sample Clock Overrun Behavior Specifies the counter behavior when data is read but a new value was not detected during a sample clock. Details
Counter Input:General Properties:More:Sample Clock Overrun Sentinel Value Specifies the sentinel value returned when the No New Sample Behavior is set to Sentinel Value. Details
Counter Input:General Properties:More:Advanced:Data Transfer and Memory:Data Transfer Mechanism Specifies the data transfer mode for the channel. Details
Counter Input:General Properties:More:Advanced:Data Transfer and Memory:Data Transfer Request Condition Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Details
Counter Input:General Properties:More:Advanced:Data Transfer and Memory:USB Transfer Request Size Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. Details
Counter Input:General Properties:More:Advanced:Data Transfer and Memory:USB Transfer Request Count Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. Details
Counter Input:General Properties:More:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. Details
Counter Input:General Properties:More:Advanced:Data Transfer and Memory:Number Of Possibly Invalid Samples Indicates the number of samples that the device might have overwritten before it could transfer them to the buffer. Details
Counter Input:General Properties:More:Advanced:Duplicate Count Prevention Specifies whether to enable duplicate count prevention for the channel. Duplicate count prevention is enabled by default. Setting CI.Prescaler disables duplicate count prevention unless you explicitly enable it. Details
Counter Input:General Properties:More:Advanced:Prescaler Specifies the divisor to apply to the signal you connect to the counter source terminal. Scaled data that you read takes this setting into account. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Setting this value disables duplicate count prevention unless you explicitly set CI.DupCountPrevention to TRUE. Details
Counter Input:General Properties:More:Advanced:Maximum Measurable Period Specifies the maximum period (in seconds) in which the device will recognize signals. For frequency measurements, a signal with a higher period than the one set in this property will return 0 Hz. For duty cycle, the device will return 0 or 1 depending on the state of the line during the max defined period of time. Period measurements will return NaN. Pulse width measurement will return zero. Details
Counter Output:Output Type Indicates how to define pulses generated on the channel. Details
Counter Output:Pulse:Idle State Specifies the resting state of the output terminal. Details
Counter Output:Pulse:Output Terminal Specifies on which terminal to generate pulses. Details
Counter Output:Pulse:Time:Units Specifies the units in which to define high and low pulse time. Details
Counter Output:Pulse:Time:High Time Specifies the amount of time that the pulse is at a high voltage. This value is in the units you specify with CO.Pulse.Time.Units or when you create the channel. Details
Counter Output:Pulse:Time:Low Time Specifies the amount of time that the pulse is at a low voltage. This value is in the units you specify with CO.Pulse.Time.Units or when you create the channel. Details
Counter Output:Pulse:Time:Initial Delay Specifies in seconds the amount of time to wait before generating the first pulse. Details
Counter Output:Pulse:Frequency:Duty Cycle Specifies the duty cycle of the pulses. The duty cycle of a signal is the width of the pulse divided by period. NI-DAQmx uses this ratio and the pulse frequency to determine the width of the pulses and the delay between pulses. Details
Counter Output:Pulse:Frequency:Units Specifies the units in which to define pulse frequency. Details
Counter Output:Pulse:Frequency:Frequency Specifies the frequency of the pulses to generate. This value is in the units you specify with CO.Pulse.Freq.Units or when you create the channel. Details
Counter Output:Pulse:Frequency:Initial Delay Specifies in seconds the amount of time to wait before generating the first pulse. Details
Counter Output:Pulse:Ticks:High Ticks Specifies the number of ticks the pulse is high. Details
Counter Output:Pulse:Ticks:Low Ticks Specifies the number of ticks the pulse is low. Details
Counter Output:Pulse:Ticks:Initial Delay Specifies the number of ticks to wait before generating the first pulse. Details
Counter Output:General Properties:Counter Timebase:Source Specifies the terminal of the timebase to use for the counter. Typically, NI-DAQmx uses one of the internal counter timebases when generating pulses. Use this property to specify an external timebase and produce custom pulse widths that are not possible using the internal timebases. Details
Counter Output:General Properties:Counter Timebase:Rate Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to define output pulses in seconds rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can define output pulses only in ticks of the timebase. Details
Counter Output:General Properties:Counter Timebase:Active Edge Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. Details
Counter Output:General Properties:Counter Timebase:Digital Filter:Enable Specifies whether to apply the pulse width filter to the signal. Details
Counter Output:General Properties:Counter Timebase:Digital Filter:Minimum Pulse Width Specifies in seconds the minimum pulse width the filter recognizes. Details
Counter Output:General Properties:Counter Timebase:Digital Filter:Timebase:Source Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details
Counter Output:General Properties:Counter Timebase:Digital Filter:Timebase:Rate Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details
Counter Output:General Properties:Counter Timebase:Digital Synchronization:Enable Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details
Counter Output:General Properties:More:Count Indicates the current value of the count register. Details
Counter Output:General Properties:More:Output State Indicates the current state of the output terminal of the counter. Details
Counter Output:General Properties:More:Auto Increment Count Specifies a number of timebase ticks by which to increase the time spent in the idle state for each successive pulse. Details
Counter Output:General Properties:More:Counter Timebase Master Timebase Divisor Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to generate slower signals without causing the count register to roll over. Details
Counter Output:General Properties:More:Pulse Done Indicates if the task completed pulse generation. Use this value for retriggerable pulse generation when you need to determine if the device generated the current pulse. For retriggerable tasks, when you query this property, NI-DAQmx resets it to FALSE. Details
Counter Output:General Properties:More:Enable Initial Delay on Retrigger Specifies whether to apply the initial delay to retriggered pulse trains. Details
Counter Output:General Properties:More:Advanced:Constrained Generation Mode Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it. Details
Counter Output:General Properties:More:Advanced:Data Transfer and Memory:Use Only Onboard Memory Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs. Details
Counter Output:General Properties:More:Advanced:Data Transfer and Memory:Data Transfer Mechanism Specifies the data transfer mode for the device. For buffered operations, use DMA or USB Bulk. For non-buffered operations, use Polled. Details
Counter Output:General Properties:More:Advanced:Data Transfer and Memory:Data Transfer Request Condition Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Details
Counter Output:General Properties:More:Advanced:Data Transfer and Memory:USB Transfer Request Size Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. Details
Counter Output:General Properties:More:Advanced:Data Transfer and Memory:USB Transfer Request Count Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. Details
Counter Output:General Properties:More:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. Details
Counter Output:General Properties:More:Advanced:Prescaler Specifies the divisor to apply to the signal you connect to the counter source terminal. Pulse generations defined by frequency or time take this setting into account, but pulse generations defined by ticks do not. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Details
Counter Output:General Properties:More:Advanced:Ready For New Value Indicates whether the counter is ready for new continuous pulse train values. Details
General Properties:Channel Type Indicates the type of the virtual channel. Details
General Properties:Physical Channel Name Specifies the name of the physical channel upon which this virtual channel is based. Details
General Properties:Description Specifies a user-defined description for the channel. Details
General Properties:Is Global Indicates whether the channel is a global channel. Details
General Properties:Synchronization Unlock Behavior Specifies the action to take if the target loses its synchronization to the grand master. Details

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