This example performs simultaneous measurement of multiple cal standards and channels, then feeds all data to SCPI commands to compute and activate 1-port calibrations for the channels.
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 *.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") ' Get the ScpiStringParser COM object Set scpi = app.ScpiStringParser ' Ensure data format is ASCII for this example scpi.Parse "form:data asc,0" Dim response ' Begging with a FPRESET to start out with no measurements response = scpi.Parse("syst:fpreset;*opc?") ' For both channels of this example, creating an S11 measurement and an "a1,1" measurement scpi.Parse "calc1:par:ext 'CH1_S11_1','S11'" scpi.Parse "calc1:par:ext 'CH1_a1_1','a1_1'" scpi.Parse "calc2:par:ext 'CH2_S11_1','S11'" scpi.Parse "calc2:par:ext 'CH2_a1_1','a1_1'" ' Feeding all four of the newly created measurements to traces in Window 1 scpi.Parse "disp:wind1:stat on" scpi.Parse "disp:wind1:trac1:feed 'CH1_S11_1'" scpi.Parse "disp:wind1:trac2:feed 'CH1_a1_1'" scpi.Parse "disp:wind1:trac3:feed 'CH2_S11_1'" scpi.Parse "disp:wind1:trac4:feed 'CH2_a1_1'" ' Setting up for 1-port cal acquisitions on both channels 1 and 2, ' using APC 3.5 female DUT connector and 85033D/E cal kit for this example. scpi.Parse "sens1:corr:coll:guid:conn:port1 'APC 3.5 female'" scpi.Parse "sens2:corr:coll:guid:conn:port1 'APC 3.5 female'" scpi.Parse "sens1:corr:coll:guid:ckit:port1 '85033D/E'" scpi.Parse "sens2:corr:coll:guid:ckit:port1 '85033D/E'" scpi.Parse "sens1:corr:coll:guid:init" scpi.Parse "sens2:corr:coll:guid:init" ' This commented-out command shows how you can query for a given connection step of a cal, ' which measurement parameters the calibration needs to measure for that step of the cal. ' But for this example we know for each step the 1-port cals want to measure S11 and ' "a1,1" a.k.a "a1_1". 'response = scpi.Execute("sens:corr:coll:guid:data:cat? STAN1") 'MsgBox response ' Set up for channel coupling and measurement parameter coupling scpi.Parse "syst:chan:coup:stat on" scpi.Parse "syst:chan:coup:par on" ' Prompt for the standards to be connected, trigger all the channel-coupled measurements, ' and feed the measured data into the cal connection steps. MsgBox "Connect all the Opens" MeasureStandards 1 MsgBox "Connect all the Shorts" MeasureStandards 2 MsgBox "Connect all the Loads" MeasureStandards 3 ' Conclude and activate the calibrations for both channels response = scpi.Parse("sens1:corr:coll:guid:save;*opc?") response = scpi.Parse("sens2:corr:coll:guid:save;*opc?") ' Finished! MsgBox "Done" 'Subroutine that acquires the measurements and feeds the data into the cal steps Sub MeasureStandards(stepNum) response = scpi.Parse("sens1:swe:mode sing;*opc?") response = scpi.Parse("calc1:par:mnum:sel 1;*opc?") response = scpi.Parse("calc1:data? rdata") scpi.Parse "sens1:corr:coll:guid:data STAN" & CStr(stepNum) & ",'S11',0," & response response = scpi.Parse("calc1:par:mnum:sel 2;*opc?") response = scpi.Parse("calc1:data? rdata") scpi.Parse "sens1:corr:coll:guid:data STAN" & CStr(stepNum) & ",'a1_1',0," & response response = scpi.Parse("calc2:par:mnum:sel 3;*opc?") response = scpi.Parse("calc2:data? rdata") scpi.Parse "sens2:corr:coll:guid:data STAN" & CStr(stepNum) & ",'S11',0," & response response = scpi.Parse("calc2:par:mnum:sel 4;*opc?") response = scpi.Parse("calc2:data? rdata") scpi.Parse "sens2:corr:coll:guid:data STAN" & CStr(stepNum) & ",'a1_1',0," & response End Sub |