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Create a Spectrum Analyzer Measurement

This example program creates a Spectrum Analyzer measurement setup.

This VBScript program can be run as a macro in the VNA. To do this, copy the code into a text editor file such as Notepad and save on the VNA hard drive as SA.vbs. Learn how to setup and run the macro.

See the Spectrum Analyzer commands.

See Other SCPI Example Programs

' Demonstration of basic Spectrum Analyzer measurement setup.

set pna=CreateObject("AgilentPNA835x.Application","hostname")

set scpi = pna.ScpiStringParser

CreateSAMeasurement

SetupLinearSweep

ConfigureAdvancedSettings

' Create a Spectrum Analyzer measurement

Sub CreateSAMeasurement

' Create a B measurement on channel 1

scpi.Parse "SYST:FPR"

scpi.Parse "DISP:WIND ON"

scpi.Parse "CALC:CUST:DEF 'sa_meas', 'Spectrum Analyzer', 'B'"

scpi.Parse "DISP:WIND:TRAC:FEED 'sa_meas'"

scpi.Parse "CALC:PAR:SEL 'sa_meas'"

' Set frequency range

scpi.Parse "SENS:FREQ:CENTER 3 GHz"

scpi.Parse "SENS:FREQ:SPAN 2 GHz"

' Center frequency step size

' Set to Auto mode with SENS:FREQ:CENTER:STEP:AUTO ON

scpi.Parse "SENS:FREQ:CENTER:STEP:SIZE 20 MHz"

' RBW filter shape

' Choices are GAUSsian|FLATtop|KAISer|BLACkman|NONe

scpi.Parse "SENS:SA:BAND:SHAPE KAIS"

' RBW and VBW values

scpi.Parse "SENS:SA:BAND:RES 100 kHz"

scpi.Parse "SENS:SA:BAND:VID 10 kHz"

' Detector type

scpi.Parse "SENS:SA:DET:FUNC PEAK"

' Video averaging type

' Choices are POWer|LOG|VOLTage|VMAX|VMIN

scpi.Parse "SENS:SA:BAND:VID:AVER:TYPE VMAX"

scpi.Parse "SENS:SA:BAND:VID:AVER:COUNT?"

' RBW/VBW and Span/RBW ratios

scpi.Parse "SENS:SA:BAND:VID:RAT 1.23"

scpi.Parse "SENS:SA:FREQ:SPAN:BAND:RAT 134"

' ADC Filter

' Choices are 11MHz|38MHz

' Enable auto mode with SENS:SA:ADC:FILT:AUTO.

scpi.Parse "SENS:SA:ADC:FILTer 38MHz"

End Sub

' Configure a Spectrum Analyzer measurement for Linear sweep mode on Port 1.

Sub SetupLinearSweep

' Turn Port 1 ON

scpi.Parse "SOURCE:POW:MODE ON"

' Set Port 1 sweep type to Linear

scpi.Parse "SENS:SA:SOURCE1:SWEEP:TYPE LIN"

' Set start and stop frequencies

scpi.Parse "SENS:SA:SOURCE1:FREQ:START 2E9"

scpi.Parse "SENS:SA:SOURCE1:FREQ:STOP 4E9"

' Set 'Source Number of Steps'. This is the number of frequencies to use between start and stop (inclusive).

' This setting is channel-wide.

scpi.Parse "SENS:SA:SOUR:SWEEP:POINT:COUNT 5"

' Set 'SA Sweeps per Source Steps'. This is the number of sweeps to take at each measurement frequency.

' This setting is also channel-wide.

scpi.Parse "SENS:SA:SOUR:SWEEP:REPEAT:COUNT 2"

End Sub

' Configure a few of the Advanced Settings for SA.

Sub ConfigureAdvancedSettings

' Set the 'Image Reject' selection.

' Choices are MIN MAX NORM NLOW NHIGH

scpi.Parse "SENS:SA:IMAGE:REJ MAX"

' Enable display of ImageReject traces.

scpi.Parse "SENS:SA:TRACE:IMAGE:STATE ON"

' Enable point mode.

' This forces the number of display points to match the FFT point count.

scpi.Parse "SENS:SA:DET:BYPASS ON"

End Sub