Perform a VMC Mixer Characterization

This example performs a VMC Mixer Characterization ONLY.

To run this example program without error:

Replace the ECal module model and serial number with that of your own, or a mechanical cal kit model.
Store a 'default.csa' instrument state file on the PNA with the setup information for your mixer. Or add mixer setup information to this program. See an example.

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 PNA. To do this, copy the following code into a text editor file, such as Notepad, and save it on the PNA hard drive as *.vbs.

Learn how to setup and run the macro.

See Other SCPI Example Programs

Dim app

Dim scpi

' Create / Get the PNA application.

Set app = CreateObject("AgilentPNA835x.Application")

Set scpi = app.ScpiStringParser

scpi.Parse "MMEM:LOAD 'default.csa'"

' Perform Cal

' Define the connector and calkit for port 1 of the VNA

scpi.Parse "sens:corr:coll:guid:conn:port1 'APC 3.5 female'"

scpi.Parse "sens:corr:coll:guid:ckit:port1 'N4691-60004 ECal 02593'"

' Define the connector and calkit for the mixer output port

scpi.Parse "sens:corr:coll:guid:conn:port3 'APC 3.5 female'"

scpi.Parse "sens:corr:coll:guid:ckit:port3 'N4691-60004 ECal 02593'"

' Select a characterization only calibration. This produces an s2p

' file of the mixer - so the mixer can be used as a calibration

' mixer for the VMC calibration

' The outcome of the calibration is an S2P file.

scpi.Parse "SENS:CORR:COLL:GUID:VMC:OPER 'CHAR'"

scpi.Parse "SENS:CORR:COLL:GUID:VMC:MIXer:CHAR:CAL:FIL 'C:/Program Files/Keysight/Network Analyzer/Documents/MyMixer.s2p'"

' Set ECal Auto orientation ON

scpi.Parse "SENS:CORR:PREF:ECAL:ORI ON"

' For the mixer char step ONLY,

' Auto orientation is turned OFF by the PNA.

' Otherwise it would fail because of the loss of the mixer.

' Manually set the ECal orientation for that step.

scpi.Parse "SENS:CORR:COLL:GUID:VMC:MIXer:ECAL:PORTmap 1,'B1'"

' the main calibration loop

' a description for the connection instructions is read

' and then the standard is acquired

dim steps, strPrompt

scpi.Parse "sens:corr:coll:guid:init"

steps=scpi.Parse ("sens:corr:coll:guid:steps?")

wscript.echo "Number of Steps = " + cstr(steps)

if (steps > 0) then ' otherwise an error condition occurred

for i = 1 to steps

strPrompt = scpi.Parse ("sens:corr:coll:guid:desc? " + CStr(i))

MsgBox strPrompt, vbOKOnly, step

scpi.Parse ("sens:corr:coll:guid:acq STAN" + CStr(i))

scpi.Parse "sens:corr:coll:guid:save"

MsgBox ("Cal is done!")

end if

Last Modified:

9-Aug-2013	Added ECal orientation command and comments
19-Feb-2013	New topic