FETCh:WDPChannel:EVM?

Last Updated: August 29, 2007

These commands return the Error Vector Magnitude (EVM) results from the dedicated physical channel (DPCH) measurement suite.

• FETCh:WDPChannel:EVM[:PARTial]?

• FETCh:WDPChannel:EVM:ALL?

• FETCh:WDPChannel:EVM:MERRor[:AVERage]?

• FETCh:WDPChannel:EVM:OOFFset[:AVERage]?

• FETCh:WDPChannel:EVM:PERRor[:AVERage]?

For more information on the conventions used in the programming examples click here.

FETCh:WDPChannel:EVM[:PARTial]?

Queries the error vector magnitude measurement integrity indicator, pass/fail result, and error vector magnitude average rms percentage result.

Query Range:

• Error Vector Magnitude Integrity Indicator: See Measurement Integrity Indicator.

• Pass/fail result: 0 (pass), 1 (fail)

• Error Vector Magnitude: <nr3> in % rms and 9.91E+37 (NAN)

Test Set Requirements: E6601A WCTS Program Version A.03 and above

Example:

' Query the Error Vector Magnitude integrity indicator, pass/fail result and actual EVM result.

TestSet.WriteString("FETCh:WDPChannel:EVM?")

FETCh:WDPChannel:EVM:ALL?

Queries the error vector magnitude measurement integrity indicator, pass/fail result, minimum measured % rms, maximum measured %rms, average %rms, and standard deviation. If the Multi-Measurement Count is set to OFF, the minimum, maximum, and average error vector magnitude are the same (and the standard deviation is zero) since only one measurement is made.

Query Range:

• Error Vector Magnitude Integrity Indicator: See Measurement Integrity Indicator.

• Pass/fail result: 0 (pass), 1 (fail)

• Minimum %rms: <nr3> in % rms and 9.91 E+37 (NAN)

• Maximum %rms: <nr3> in % rms and 9.91 E+37 (NAN)

• Average %rms: <nr3> in % rms and 9.91 E+37 (NAN)

• Standard deviation: <nr3> in % rms and 9.91 E+37 (NAN)

Test Set Requirements: E6601A WCTS Program Version A.03 and above

Example:

' Query the Error Vector Magnitude integrity indicator, pass/fail result, minimum measured % rms, maximum measured %rms, average %rms, and standard deviation.

TestSet.WriteString("FETCh:WDPChannel:EVM?")

FETCh:WDPChannel:EVM:MERRor[:AVERage]?

Queries the average Magnitude error in percent rms.

Query Range: <nr3> in % rms and 9.91 E+37 (NAN)

Test Set Requirements: E6601A WCTS Program Version A.03 and above

Example:

' Query the average Magnitude Error in %rms.

TestSet.WriteString("FETCh:WDPChannel:EVM:MERRor?")

FETCh:WDPChannel:EVM:OOFFset[:AVERage]?

Queries the average origin offset in dB.

Query Range: <nr3> in dB and 9.91 E+37 (NAN)

Test Set Requirements: E6601A WCTS Program Version A.03 and above

Example:

' Query the average Origin Offset in dB.

TestSet.WriteString("FETCh:WDPChannel:EVM:OOFFset?")

FETCh:WDPChannel:EVM:PERRor[:AVERage]?

Queries the average Phase error in percent rms.

Query Range: <nr3> in % rms and 9.91 E+37 (NAN)

Test Set Requirements: E6601A WCTS Program Version A.03 and above

Example:

' Query the average Magnitude Error in %rms.

TestSet.WriteString("FETCh:WDPChannel:EVM:PERRor?")