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RFmxEVDO_CfgFrequencyReference

RFmx EV-DO 19.1 Help

Edition Date: October 2019

Part Number: 375499H-01

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RFmx EV-DO 19.1 Help
RFmx EV-DO 20.0 Help

int32 __stdcall RFmxEVDO_CfgFrequencyReference (niRFmxInstrHandle instrumentHandle, char channelName[], char frequencyReferenceSource[], float64 frequencyReferenceFrequency);

Purpose

Configures the Reference Clock and the frequency reference source.

This function is a wrapper over the RFmx Instruments API, and calls the RFmxInstr_CfgFrequencyReference function.

Parameters

Input
Name Type Description
instrumentHandle niRFmxInstrHandle Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxEVDO_Initialize function.
channelName char[] Set this parameter to "" (empty string) or NULL.
frequencyReferenceSource char[] Specifies the frequency reference source.
RFMXEVDO_VAL_ONBOARD_CLOCK_STR (OnboardClock)

PXIe-5663/5663E: The RFmx driver locks the PXIe-5663/5663E to the PXIe-5652 LO source onboard clock. Connect the REF OUT2 connector (if it exists) on the PXIe-5652 to the PXIe-5622 CLK IN terminal. On versions of the PXIe-5663/5663E that lack a REF OUT2 connector on the PXIe-5652, connect the REF IN/OUT connector on the PXIe-5652 to the PXIe-5622 CLK IN terminal.

PXIe-5665: The RFmx driver locks the PXIe-5665 to the PXIe-5653 LO source onboard clock. Connect the 100 MHz REF OUT terminal on the PXIe-5653 to the PXIe-5622CLK IN terminal.

PXIe-5668R: Lock the PXIe-5668R to the PXIe-5653 LO SOURCE onboard clock. Connect the LO2 OUT connector on the PXIe-5606 to the CLK IN connector on the PXIe-5624R.

PXIe-5644R/5645R/5646R: The RFmx driver locks the device to its onboard clock.

RFMXEVDO_VAL_REF_IN_STR (RefIn)

PXIe-5663/5663E: Connect the external signal to the PXIe-5652 REF IN/OUT connector. Connect the REF OUT2 connector (if it exists) on the PXIe-5652 to the PXIe-5622 CLK IN terminal.

PXIe-5665: Connect the external signal to the PXIe-5653 REF IN connector. Connect the 100 MHz REF OUT terminal on the PXIe-5653 to the PXIe-5622 CLK IN connector. If your external clock signal frequency is set to a frequency other than 10 MHz, set the frequencyReferenceFrequency parameter according to the frequency of your external clock signal.

PXIe-5668R: Connect the external signal to the PXIe-5653 REF IN connector. Connect the LO2 OUT on the PXIe-5606 to the CLK IN connector on the PXIe-5622. If your external clock signal frequency is set to a frequency other than 10 MHz, set the frequencyReferenceFrequency parameter according to the frequency of your external clock signal.

PXIe-5644R/5645R/5646R: The RFmx driver locks the device to the signal at the external REF IN connector.

RFMXEVDO_VAL_PXI_CLK_STR(PXI_Clk)

PXIe-5668R: Lock the PXIe-5653 to the PXI backplane clock. Connect the PXIe-5606 LO2 OUT to the LO2 IN connector on the PXIe-5624R.

PXIe-5644R/5645R/5646R, PXIe-5663/5663E/5665: The RFmx driver locks these devices to the PXI backplane clock.

RFMXEVDO_VAL_CLK_IN_STR (ClkIn)

PXIe-5663/5663E: The RFmx driver locks the PXIe-5663/5663E to an external 10 MHz signal. Connect the external signal to the PXIe-5622 CLK IN connector, and connect the PXIe-5622 CLK OUT connector to the REF IN/OUT connector on the PXIe-5652.

PXIe-5665: The RFmx driver locks the PXIe-5665 to an external 100 MHz signal. Connect the external signal to the PXIe-5622 CLK IN connector, and connect the PXIe-5622 CLK OUT connector to the REF IN connector on the PXIe-5653. Set the frequencyReferenceFrequency parameter to 100 MHz.

PXIe-5668R: Lock the PXIe-5668R to an external 100 MHz signal. Connect the external signal to the CLK IN connector on the PXIe-5624R, and connect the PXIe-5624R CLK OUT connector to the REF IN connector on the PXIe-5653. Set the frequencyReferenceFrequency parameter to 100 MHz.

PXIe-5644R/5645R/5646R: This configuration does not apply to the PXIe-5644R/5645R/5646R.

frequencyReferenceFrequency float64 Specifies the Reference Clock rate when you set the frequencyReferenceSource parameter to RFMXEVDO_VAL_CLK_IN_STR or RFMXEVDO_VAL_REF_IN_STR. This value is expressed in Hz.

Return Value

Name Type Description
status int32 Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. Examine the status code from each call to an RFmx function to determine if an error has occurred.

To obtain a text description of the status code and additional information about the error condition, call the RFmxEVDO_GetError function.

The general meaning of the status code is as follows:

Value Meaning
0 Success
Positive Values Warnings
Negative Values Errors

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