Programming a Spectrum Emission Mask Measurement

Last updated: January 16, 2009

This section provides an example of how to make a spectrum emission mask measurement via GPIB. The following program example assumes that the mobile station's (UE's) antenna output is connected to the RF IN/OUT connector, and that the mobile station is transmitting an uplink signal.

The basic procedure is as follows:

Set the spectrum emission mask setup parameters as desired using the SETup:WSEMask commands.
Use the INITiate:WSEMask command to start the measurement.
Use the FETCh:WSEMask? query to obtain the measurement results.

Programming Example

 
10    ! Set trigger mode to single for the Spectrum Emission Mask meas.
20    OUTPUT 714;"SETup:WSEMask:CONTiuous OFF"
30    ! Set the multi-measurement count to 10
40    OUTPUT 714;"SETup:WSEMask:COUNt 10"
50    ! Set a timout value of 5 seconds and enable the timeout state
60    OUTPUT 714;"SETup:WSEMask:TIMeout 5"
70    ! Set the trigger source to automatically select the appropriate
80    !  trigger
90    OUTPUT 714;"SETup:WSEMask:TRIGger:SOURce AUTO"
100   ! Initiate the Spectrum Emission Mask measurement
110   OUTPUT 714;"INITiate:WSEMask"
120   ! Fetch the integrity indicator and the results of the measurement
130   OUTPUT 714;"FETCh:WSEMask?"
140   ENTER 714;Integrity,Wsemask,Chan_power,R1,R2,R3,R4
150   ! Check the integrity indicator to ensure the results are valid
160   IF Integrity<>0 THEN
170     PRINT "Measurement failed."
180   ELSE
190   ! Process the measurement results.
200   END IF
210   END

Returned Values

Integrity stores the returned integrity indicator value (see Integrity Indicator ); 0 means a successful measurement with no errors.
Because multi-measurements are being used, R1, R2, R3, and R4 indicate a mask pass or fail for each frequency range based on the average of the power levels associated with the largest mask error for each measurement. Mask pass or fail for each frequency range is determined from the average of the measurement results. The average of the relative power level results for the number of measurements specified is taken. This average is used to determine if that frequency range passed or failed the mask. If multi-measurements were not being used, the mask result would be based on a single measurement value for each frequency range.

Programming a Spectrum Emission Mask Measurement

Programming Example

Returned Values

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