This program demonstrates how to change source and receive ports when measuring noise figure. It assumes that option 029 ("Fully Corrected Noise Figure") is installed.
If only option 028 ("Noise figure measurements using standard receivers") is installed, switching ports is simpler, since only one noise receiver selection is available.
This 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 NF.vbs. Learn how to setup and run the macro.
See the Noise figure commands.
See Other SCPI Example Programs
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option explicit dim app, hostname, parser set app = CreateObject("Agilentpna835x.application") set parser = app.ScpiStringParser ' Create Noise Figure measurement parser.Parse "*RST" parser.Parse "CALC:PAR:DEL:ALL" parser.Parse "CALC:CUST:DEF 'NF', 'Noise Figure Cold Source', 'NF' " parser.Parse "DISP:WIND:TRAC1:FEED 'NF'" 'To change from the default input/output port settings of ' source port = VNA1, receive port = VNA2, you must first ' change the noise receiver, then select the desired ports. dim srcPort, rcvPort ' Set source=VNA port 3 and receiver=VNA port 4 srcPort = 3 rcvPort = 4 ' use VNA receiver for noise measurements parser.Parse "SENS:NOIS:REC NORMAL" ' set port mapping parser.Parse "SENS:NOIS:PMAP " & srcPort & "," & rcvPort ' To revert back to using the noise receiver, the receive port must ' be set to the default value VNA2 BEFORE switching to the noise receiver. ' Otherwise, the SCPI error ' "The noise receiver is not available for the selected receive port" ' will occur. parser.Parse "SENS:NOIS:PMAP 3,2" ' use dedicated noise receiver for noise measurements parser.Parse "SENS:NOIS:REC NOISE" |