:CALCulate:PARameter:DEFine

Description

This command selects the measurement type, which should be performed. For more details about the different measurement types please refer to the general info page about measurements (Measurement Types).

Important

The standard behaviour of this method is that the input parameters (gain, attenuation, termination, ...) are kept. The optional DEFault parameter allows to apply measurement relevant default (preset) settings.

Command

Syntax	Parameter
`:CALCulate<ch>:PARameter<tr>:DEFine`	{ `S11` \| `S21` \| `GAINphase` \| `CH1` \| `CH2` \| `Z` \| `R` \| `T` }[,`DEFault`]

Parameters	accepted format	allowed suffixes	possible Errors	description
<`ch`>	{ `1` \| `empty` }	`none`	`Invalid channel index`	Currently only one channel is supported. `Empty` means `1` is used as default.
<`tr`>	{ `1` \| `empty` }	`none`	`Invalid trace index`	Currently only one trace is supported. `Empty` means `1` is used as default.
{ `S11` \| `S21` \| `GAINphase` \| `CH1` \| `CH2` \| `Z` \| `R` \| `T` }	exactly the given options	`none`	`Illegal parameter value`	The measurement to perform
[optional] `DEFault`	exactly the given options	`none`	`Illegal parameter value`	If applied the input parameters (gain, attenuation, termination, ...) are ALWAYS set to the default values; otherwise the settings from the previous measurement will be kept.

Query

Syntax	Response
`:CALCulate<ch>:PARameter<tr>:DEFine?`	{ `S11` \| `S21` \| `GAINphase` \| `CH1` \| `CH2` \| `Z` \| `R` \| `T` }

Parameters	accepted format	description
<`ch`>	{ `1` \| `empty` }	Currently only one channel is supported. `Empty` means `1` is used as default.
<`tr`>	{ `1` \| `empty` }	Currently only one trace is supported. `Empty` means `1` is used as default.

Response value	description
{ `S11` \| `S21` \| `GAINphase` \| `CH1` \| `CH2` \| `Z` \| `R` \| `T` }	The measurement type.

Options

Options	Description
`CH1`	Absolute measurement on channel 1. (VRMS)
`CH2`	Absolute measurement on channel 2. (VRMS)
`GAINphase`	Gain - phase measurement.
`R`	Absolute measurement on channel R (Ch1). (VRMS)
`S11`	S11 measurement.
`S21`	S21 measurement.
`T`	Absolute measurement on channel T (Ch2). (VRMS)
`Z`	Impedance measurement (Series Thru, Shunt Thru, Port 1 Reflection, External Coupler, External Bridge, Impedance Adapter and Voltage Current Gain as defined in: :SENSe:Z:METHod)

Presets

default value
{ `S11` \| `S21` \| `GAINphase` \| `CH1` \| `CH2` \| `Z` \| `R` \| `T` }	`S11`

Sample usage

Configure and start a S21 measurement.

var visaSession = new TcpipSocket(VISA_RESOURCENAME);
visaSession.RawIO.Write(":SENS:FREQ:STAR 5kHz;STOP 50kHz\n");
visaSession.RawIO.Write(":CALC:PAR:DEF S21\n");
visaSession.RawIO.Write(":TRIG:SING\n");
// wait for the measurement to finish
visaSession.RawIO.Write("*OPC?\n");
visaSession.RawIO.ReadString();
visaSession.RawIO.Write(":SENS:FREQ:DATA?\n");
var frequencyValues = visaSession.RawIO.ReadString();
visaSession.RawIO.Write(":CALC:DATA:SDAT?\n");
var measurementValues = visaSession.RawIO.ReadString();

Python

visaSession.write(':SENS:FREQ:STAR 5kHz;STOP 50kHz\n')
visaSession.write(':CALC:PAR:DEF S21\n')
visaSession.write(':TRIG:SING\n')
visaSession.query('*OPC?\n')
frequencyValues = visaSession.query(':SENS:FREQ:DATA?\n')
measurementValues = visaSession.query(':CALC:DATA:SDAT?\n')

:CALCulate:PARameter:COUNt

:CALCulate:PARameter:SELect

:SENSe:FREQuency:STARt

:SENSe:FREQuency:STOP