FetchDevm(string, double, out double, out double, out double)
- Updated2025-10-13
- 2 minute(s) read
Fetches ModAcc differential EVM (DEVM) measurement results. These results are valid only for enhanced data rate (EDR) packets.
Syntax
Namespace: NationalInstruments.RFmx.BTMX
public int FetchDevm(string selectorString, double timeout, out double peakRmsDevmMaximum, out double peakDevmMaximum, out double ninetyninePercentDevm)
Parameters
| Name | Type | Description |
|---|---|---|
| selectorString | string | Specifies a selector string comprising of the result name. If you do not specify the result name, the default result instance is used. Example: |
| timeout | double | 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 method waits until the measurement is complete. |
| peakRmsDevmMaximum | out double | Upon return, contains the peak of the RMS DEVM values computed on each 50us block of the EDR portion of the EDR packet. When you set SetAveragingEnabled(string, RFmxBTMXModAccAveragingEnabled) method to True, it returns the maximum of the peak RMS DEVM values computed for each averaging count. This value is expressed in percentage. |
| peakDevmMaximum | out double | Upon return, contains the peak of the DEVM values computed on symbols in the EDR portion of the EDR packet. When you set the SetAveragingEnabled(string, RFmxBTMXModAccAveragingEnabled) method to True, it returns the maximum of the peak symbol DEVM values computed for each averaging count. This value is expressed in percentage. |
| ninetyninePercentDevm | out double | Upon return, contains the 99th percentile of the DEVM values computed on symbols of the EDR portion of all measured EDR packets. This value is expressed in percentage. |
Returns
Returns the status code of this method. The status code either indicates success or describes a warning condition.