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Power Meter Uncertainty

This VBScript program is an example of setting up power uncertainty on a power meter.

The SCPI commands in this example are sent over a COM interface using the SCPIStringParser object. You do NOT need a GPIB connection to run this example.

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

'

' Keysight Technologies 2018

'

' Uncertainty on power meter example with SCPI

'

' This script executes and prints the results of  all the

' commands  related to the uncertainty on power meter

'

'''''''''''''''''''''''''''''''''''''''''

' Create the Application and parser objects

option explicit

dim app, scpi

set app = CreateObject("AgilentPNA835x.Application")

set scpi = app.ScpiStringParser

'''''''''''''''''''''''''''''''''''''''''

' query for the ID to verify the communication is established

wscript.echo scpi.execute("*IDN?")

'

' In the following 'Device2' is name of the used external device

'

'''''''''''''''' QUERY COMMANDS '''''''''''''''''''

' Query for the available power meter models

'

dim catalog

catalog=scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:CAT? 'Device2' ")

wscript.echo catalog

' the return is a csv value

'

' Query for the file path. If the model is NOT Custom Model this function will return

' "Undefined"

'

wscript.echo scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:FILE? 'Device2' ")

'

' Query for the pwr mtr model used.

wscript.echo scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:MOD? 'Device2' ")

'

' Query for the uncertainty of the pwr meter at 0.GHz and with 10dBm power level

wscript.echo scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:READ? 'Device2',0.1GHz,10.0 ")

'

' Query for the optimum power level (minimum uncertainty) for for the selected

' power meter

wscript.echo scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:PLEV? 'Device2' ")

'

'''''''''''''''' SETTING COMMANDS '''''''''''''''''''

'

' Setting a specific model:

scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:MOD 'Device2','N8482A' ")

'

' Setting a custom file

scpi.Execute ("SYST:CONF:EDEV:PMAR:UNC:FILE 'Device2','C:\Users\Public\Documents\Network Analyzer\UncSensorExample.dat' ")

'

'