Specifies the source attenuator level in dB at which to perform a transmission response calibration.

Calibrations of the following type are required to set this value.

This key corresponds with the PNA SCPI command "SOURce<cnum>:POWer<port>:ATTenuation <num>, [src]" parameter as explained the Keysight Documentation

An Example:

;******************************************************************************
;Calibration Configuration (TransmissionResponse)
;*******************************************************************************
[Cal_TransmissionResponse]
CalAcquireTimeoutSec = 60
CalSetDescription = TransmissionResponse test
CalSetName = Cal_TransmissionResponse
CalType = TransmissionResponse
ConfigType = Calibration
DirectoryToUse = c:\temp
LoadFilename = TransmissionResponseSetup.csa
SaveFilename = TransmissionResponseCal.csa
PathName = PATH_1
PowerAverageCount = 1
PowerAverageTolerance = 0.2
PowerIterationCount = 30
PowerIterationTolerance = 0.5
PowerLevel2 = 10
PowerLevelOffset = 0.0
PowerSensorPort = 1
ReceiverResponseAttenuation = 0.0
ReceiverStimulusAttenuation = 0.0
SourceAttenuation = 0.0

;******************************************************************************
;Device Configuration (DCM on PNA port 1)
;*******************************************************************************
[DCM_1]
ConfigType = Dcm
IpAddress = 10.11.201.20
IpScpiPort = 5025
IpTracePort = 5007
ResponseTimeoutSec = 60

;******************************************************************************
;Switch Configuration (DCM on PNA port 1)
;*******************************************************************************
[DCMSwitch]
ConfigType = Switch
Device = DCM_1
SwitchIndex = 1

;******************************************************************************
;Path Configuration (RF to DCM)
;*******************************************************************************
[PATH_1]
ConfigType = Path
PnaPort1Device = DCM_1:1,3
PnaPort2Device = DCM_1:3
SwitchPath = DCMSwitch:0

;*******************************************************************************
;PNA Configuration
;*******************************************************************************
[PNA_1]
ConfigType = Pna
DirectoryToUse = C:\Temp
FileTransferTimeoutSec = 60
IpAddress = 10.11.210.1
IpScpiPort = 5025
IpTracePort = 5007
PortCount = 4
ResponseTimeoutSec = 60
VerifyCommands = 0