VNA Master™Programming Manual : VNA Commands : [:SENSe]:CALibration Subsystem
 
[:SENSe]:CALibration Subsystem
This subsystem controls the system calibration.
Calibration State
[:SENSe]:CALibration:STATe?
Description
Reports the calibrated state. This command returns a 0 if there is no valid calibration, otherwise it returns the bit of the S parameters that has a valid calibration. The bits are as follows:
S11 bit
0x01
S12 bit
0x02
S21 bit
0x04
S22 bit
0x08
For example, if a value of 15 is returned, then all of the S parameters bit is valid (because decimal 15 is equivalent to binary 1111). For another example, if a value of 1 is returned, then S11 has a valid calibration because binary of 1 is 0x01.
Syntax
[:SENSe]:CALibration:STATe?
Cmd Parameter
NA (query only)
Query Response
<NR1> <integer> (0 to 15)
Front Panel Access
NA
 
[:SENSe]:CORRection Subsystem
This subsystem provides commands for losses or gains external to the instrument.
[:SENSe]:CORRection Subsystem 
Keyword
Parameter Data or Units
[:SENSe]
 
:CORRection
 
:CKIT
:COLLect
 
Error Correction Data
[:SENSe]:CORRection:DATA?
Title
Error Correction Data
Description
Transfers the system error correction data from the instrument to the controller. <error term parameter> are string parameters that describe the different error terms.
<error term parameter>
Descriptions
ERF
(Forward) Reflection tracking
EDF
(Forward) Directivity
ESF
(Forward) Source match
ETF
(Forward) Transmission tracking
ELF
(Forward) Load match
EXF
(Forward) Isolation
ETFS
(Forward Sensitivity) Transmission tracking
ELFS
(Forward Sensitivity) Load match
EXFS
(Forward Sensitivity) Isolation
ERR
(Reverse) Reflection tracking
EDR
(Reverse) Directivity
ESR
(Reverse) Source match
ETR
(Reverse) Transmission tracking
ELR
(Reverse) Load match
EXR
(Reverse) Isolation
ETRS
(Reverse Sensitivity) Transmission tracking
ELRS
(Reverse Sensitivity) Load match
EXRS
(Reverse Sensitivity) Isolation
Error Correction Data (continued)
The format of the block data that is returned can be specified by the command :FORMat:DATA. The response begins with an ASCII header that specifies the number of data bytes. It appears in the format #AX, where A is the number of digits in X, and X is the number of bytes that follow the header. Each data point is separated by a comma delimiter. Each term contains one complex value (real and imaginary) for each sweep point.
Syntax
[:SENSe]:CORRection:DATA? <error terms parameters>
Cmd Parameter
NA (query only)
Query Response
<char> (returns block data)
Related Command
:FORMat:DATA
Front Panel Access
NA
Smith Chart Reference Impedance
[:SENSe]:CORRection:IMPedance[:INPut][:MAGNitude]:SMCHart
Description
Sets the Smith Chart reference impedance. Sets 50 for 50 ohm. Sets 75 for 75 ohm. The query form of the command returns the current Smith Chart reference impedance in ohms.
Syntax
[:SENSe]:CORRection:IMPedance[:INPut][:MAGNitude]
:SMCHart 50|75
[:SENSe]:CORRection:IMPedance[:INPut][:MAGNitude]
:SMCHart?
Cmd Parameter
<char> 50|75
Query Response
<char> 50|75
Range
50 ohm, 75 ohm
Default Value
50 ohm
Front Panel Access
Scale, Reference Impedance
Note 
The Reference Admittance that is used in the Inverse Smith Chart graph type and in the Admittance marker readout is the inverse of this Reference Impedance value and is derived from this variable.
 
Calibration Correction State
[:SENSe]:CORRection[:STATe]
Description
Turns the calibration error correction ON or OFF. Note that error correction can be turned ON only if valid calibration is available.
Syntax
[:SENSe]:CORRection[:STATe] OFF|ON
[:SENSe]:CORRection[:STATe]?
Parameter
OFF|ON
Cmd Parameter
<boolean> OFF|ON|0|1
Query Response
<bNR1> 0|1
Default Value
0
Front Panel Access
Shift‑2 (Calibrate), Cal Correction