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Signal Generation – The SOURce Subsystem Measurement Operations & Settings
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 129
command:
[:SOURce[n]][:CHANnel[m]]:READout:DATA?
syntax: [:SOURce[n]][:CHANnel[m]:READout:DATA?
description: Returns the data as a binary stream from either a lambda logging operation or the maximum
power the laser can produce at each wavelength.
parameters: LLOGging:
PMAX:
Returns a binary stream that contains each wavelength step of the lambda
logging operation, see
“[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:LLOGging” on page 140.
Each binary block is an 8-byte long double in Intel byte order.
Returns a binary stream that contains the maximum power the laser can pro-
duce at each wavelength. Each binary block is a 8-byte long double (the
wavelength value) followed by a 4-byte long float (the power value). The
stream is in Intel byte order.
response: A binary stream in Intel byte order.
example: sour2:read:data? llog → the data as a binary stream
affects: All tunable laser and DFB source modules
command:
[:SOURce[n]][:CHANnel[m]]:READout:DATA:BLOCk?
syntax: [:SOURce[n]][:CHANnel[m]:READout:DATA:BLOCk?<wsp>LLOGging|PMAX,<offset>,<# of
data points>
description: Returns a specified binary block from either a lambda logging operation, or maximum power
at wavelength characteristic.
parameters: LLOGging: Returns the data block from lambda logging. The binary block is an 8-
byte long double in Intel byte order.
PMAX: Returns the data block from the power curve characteristic. Each binary
block is a 8-byte long double (the wavelength value) followed by a 4-
byte long float (the power value). The stream is in Intel byte order.
<offset> A zero based offset that specifies the index of the first value within the
block to be transferred.
<# of data points> The number of points (not bytes!) in the transferred block.
response: A binary stream in Intel byte order.
example: sour0:read:data:block? llog,100,20000 → the data as a binary stream
affects: All tunable laser and DFB source modules
command:
[:SOURce[n]][:CHANnel[m]]:READout:DATA:MAXBlocksize?
syntax: [:SOURce[n]][:CHANnel[m]:READout:DATA:MAXBlocksize?
description: Returns the maximum block size for a single GPIB transfer for lambda logging functions. If
your application requires more data points please use SOURce[n]][:CHANnel[m]]:READ-
out:DATA:BLOCk? instead of SOURce[n]][:CHANnel[m]]:READout:DATA?
parameters: none
response: The maximum number of data points (not bytes!) in the transferred block, as an integer value.
example: sour0:read:data:maxb? → 120<END>
affects: All tunable laser and DFB source modules