RFmxEVDO_ModAccFetchUplinkPeakCDE

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_ModAccFetchUplinkPeakCDE (niRFmxInstrHandle instrumentHandle, char selectorString[], float64 timeout, float64* uplinkPeakCDE, int32* uplinkPeakCDEWalshCodeNumber, int32* uplinkPeakCDEBranch);

Purpose

Returns the maximum value among the code domain errors (CDEs), in dB.
The CDEs are calculated by projecting the descrambled error vector onto the code domain at a specific spreading factor.
The CDE for every code with a specific spreading factor is defined as the ratio of the mean power of the projection onto that code to the mean power of the composite reference waveform.
A fixed spreading factor of 16 is used.
The CDEs are calculated separately for I and Q branches.

Parameters

Input
Name Type Description
instrumentHandle niRFmxInstrHandle Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxEVDO_Initialize function.
selectorString char[] Specifies a selector string comprising of the signal name and result name. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name, the default result instance is used.
Examples:
""
"signal::sig1"
"result::r1"
"signal::sig1/result::r1"
You can use the RFmxEVDO_BuildSignalString function to build the selector string.
timeout float64 Specifies the timeout for fetching the specified measurement. This value is expressed in seconds. Set this value to an appropriate time, longer than expected for fetching the measurement. A value of -1 specifies that the function waits until the measurement is complete.
uplinkPeakCDE float64* Returns the maximum value among the CDEs. This value is expressed in dB.
uplinkPeakCDEWalshCodeNumber int32* Returns the code number of the channel corresponding to the uplinkPeakCDE result.
uplinkPeakCDEBranch int32* Returns the quadrature branch of the peak CDE.
RFMXEVDO_VAL_MODACC_UPLINK_PEAK_CDE_BRANCH_I (0) Returns the channel with peak CDE detected on the in-phase branch.
RFMXEVDO_VAL_MODACC_UPLINK_PEAK_CDE_BRANCH_Q (1) Returns the channel with peak CDE detected on the quadrature branch.

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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