FETCh:WPPAnalysis

Function

The [:ALL] mnemonic queries a PRACH preamble analysis measurement result and returns the following comma separated values: Integrity Indicator, EVM (rms) in % rms, EVM (peak) in %, Frequency Error in Hz, Origin Offset in dB, Phase Error (rms) in degrees, Magnitude Error in %, Timing Error in chips, IQ Gain Imbalance in dB, IQ Phase Imbalance in degrees, Signature.

You may also query the individual measurement results using the appropriate mnemonic.

See PRACH Preamble Analysis Measurement Results .

Query

Integrity Indicator - See Integrity Indicator .

EVM (rms)

• Range: 0.0 to 100.0% rms, 9.91E+37
• Resolution: 0.1% rms

EVM (peak)

• Range: 0.0 to 100.0%, 9.91E+37
• Resolution: 0.1%

Frequency Error

• Range: -9.999 kHz to +9.999 kHz, 9.91E+37
• Resolution: 0.1 Hz

Origin Offset

• Range: -100.0 to 0.0 dB, 9.91E+37
• Resolution: 0.1 dB

Phase Error

• Range: -180.0 to +180.0 degrees, 9.91E+37
• Resolution: 0.1 degrees

Magnitude Error

• Range: 0.0 to 100.0%, 9.91E+37
• Resolution: 0.1%

Timing Error

• Range: -383.62 to +383.62 chips, 9.91E+37
• Resolution: 0.01 chips

IQ Gain Imbalance

• Range: -100.0 to 100.0 dB, 9.91E+37
• Resolution: 0.1 dB

IQ Phase Imbalance

• Range: -180.0 to 180.0 degrees, 9.91E+37
• Resolution: 0.1 degrees

Signature

• Range: 0 to 15, 9.91E+37
• Resolution: 1

Requirements

Lab Application Revision: B.01 and above

Programming Example

 
OUTPUT 714;"FETCh:WPPAnalysis?"
! Returns Integrity Indicator, EVM (rms) in % rms, EVM (peak) in %,
! Frequency Error in Hz, Origin Offset in dB, Phase Error (rms) in degrees,
! Magnitude Error in %, Timing Error in chips, IQ Gain Imbalance in dB,
! IQ Phase Imbalance in degrees, Signature

 
OUTPUT 714;"FETCh:WPPAnalysis:EVM?"
! Returns EVM (rms) in % rms.

Function

Queries the access slot used for the PRACH preamble analysis measurement. This result is only available when SETup:WPPAnalysis:TRIGger:SOURce is set to PROTocol.

Query

Range: 0 to 14

Requirements

Lab Application Revision F.00 and above.

Programming Example

 
OUTPUT 714;"FETCH:WWPAnalysis:SLOT:USED?" 
!Returns the access slot used for the PRACH preamble analysis measurement. 

Function

Queries a PRACH preamble analysis result and returns: number of chips measured, relative chip location of the first data point, and a variable length list of measured data for the measurement result indicated by appending:

• EVM (EVM in %)
• PHASe (Relative Phase in degrees)
• IQ (IQ Constellation)
• POWer (Relative Power in dB)

For EVM, relative phase and relative power, one data point is returned for each chip measured (maximum is 4096 data points for EVM and relative phase, 4296 data points for relative power). For IQ constellation, two data points are returned for each chip measured (maximum is 2 x 4096 data points).

See PRACH Preamble Analysis Measurement Results .

Query

EVM

• Range: 0.0 to 100.0% rms, 9.91E+37
• Resolution: 0.1% rms

Relative Phase

• Range: -180.0 to 180.0 degrees, 9.91E+37
• Resolution: 0.1 degrees

IQ Constellation

• Range: -1.0000 to 1.0000, 9.91E+37
• Resolution: 0.0001

Relative Power

• Range: -100.0 to 0.0 dB, 9.91E+37
• Resolution: 0.1 dB

Requirements

Lab Application Revision: B.01 and above

Programming Example

 
OUTPUT 714;"FETCh:WPPAnalysis:TRACe:EVM?"
! Returns number of chips measured, relative chip location of the first data point,
! and a maximum of 4096 EVM values (one for each chip measured).