:CALCulate[:SELected]:FORMat

Description

This command selects the format of the results data.

Command

Syntax	Parameter
`:CALCulate<ch>[:SELected]:FORMat`	{ `GDELay` \| `IMAGinary` \| `MLINear` \| `MLOGarithmic` \| `PHASe` \| `REAL` \| `UPHase` \| `SWR` \| `SMITh` \| `SLINear` \| `SLOGarithmic` \| `SCOMplex` \| `SADMittance`}

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.
{ `GDELay` \| `IMAGinary` \| `MLINear` \| `MLOGarithmic` \| `PHASe` \| `REAL` \| `UPHase` \| `SWR` \| `SMITh` \| `SLINear` \| `SLOGarithmic` \| `SCOMplex` \| `SADMittance` }	exactly the given options	`none`	`Illegal parameter value`	The results format

Query

Syntax	Response
`:CALCulate<ch>[:SELected]:FORMat?`	{ `GDELay` \| `IMAGinary` \| `MLINear` \| `MLOGarithmic` \| `PHASe` \| `REAL` \| `SMITh` \| `SLIN` \| `SLOG` \| `SCOM` \| `SADM` \| `UPHase` }

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

Options

Options	Description
`GDELay`	group delay
`IMAGinary`	imaginary part
`MLINear`	linear magnitude
`MLOGarithmic`	logarithmic magnitude
`PHASe`	phase (in degrees)
`REAL`	real part
`SWR`	standing wave ratio
`UPHase`	unwrapped phase
`SLINear`	linear magnitude + phase (deg)
`SLOGarithmic`	logarithmic magnitude + phase (deg)
`SCOMplex`	real part + imaginary part
`SMITh`	R + jX - (resistance + reactance)
`SADMittance`	G + jB - (conductance + susceptance)

Important

Smith data types are only supported for S11, S21, GAINphase or Z measurements. The S21 and GAINphase measurement does NOT support SMIT or SADM. If the selected format is not supported, a Settings Conflict error is raised.

Note

For S11 measurements SLIN, SLOG and SCOM return the reflection coefficient while for S21, GAINphase measurements the transmission coefficient will be returned. When perfomring Z measurements SLIN, SLOG and SCOM return the impedance (:CALC:SEL:ZPAR:DEF Z) respectively the admittance (:CALC:SEL:ZPAR:DEF Y) or reflection (:CALC:SEL:ZPAR:DEF REFL) values.
SMIT returns always impedance while SADMittance returns always admittance values.

Note

The format selection DOES NOT influence the result, when performing an absolute measurement (CH1, CH2, R, T). The only interesting value to obtain from an absolute measurement is the VRMS and therefore the VRMS value is returned, regardless of the format settings.

Presets

default value
{ `GDELay` \| `IMAGinary` \| `MLINear` \| `MLOGarithmic` \| `PHASe` \| `REAL` \| `UPHase` \| `SWR` \| `SMITh` \| `SLINear` \| `SLOGarithmic` \| `SCOMplex` \| `SADMittance`}	`MLINear`

Sample usage

Configure and start an S21 measurement and get the logarithmic magnitude.

var visaSession = new TcpipSocket(VISA_RESOURCENAME);
visaSession.RawIO.Write(":TRIG:SOUR BUS\n");
visaSession.RawIO.Write(":SENS:FREQ:STAR 5kHz;STOP 50kHz\n");
visaSession.RawIO.Write(":CALC:PAR:DEF S21\n");
visaSession.RawIO.Write(":CALC:FORM MLOG\n");
visaSession.RawIO.Write(":INIT\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(':TRIG:SOUR BUS\n');
visaSession.write(':SENS:FREQ:STAR 5kHz;STOP 50kHz\n')
visaSession.write(':CALC:PAR:DEF S21\n')
visaSession.write(':CALC:FORM MLOG\n')
visaSession.write(':INIT\n');
visaSession.write(':TRIG:SING\n')
# wait for the measurement to finish
visaSession.query('*OPC?\n')
frequencyValues = visaSession.query(':SENS:FREQ:DATA?\n')
measurementValues = visaSession.query(':CALC:DATA:SDAT?\n')