Keysight Technologies 8163A/B Programming Manual page 279

8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
The wavelength sweep is actually started 50 pm before the Start
Wavelength and ends 50 pm after the Stop Wavelength, this means, you
have to choose a Stop Wavelength to assure that the full chosen
wavelength range is covered. If the step is larger than 50 pm, then this
larger margin is used instead.
Triggers coordinate the Tunable Laser module with all Power Meters. The
function sets for the lowest possible averaging time available for the
installed Power Meters and, then, sets the highest possible sweep speed
for the selected Tunable Laser module sweep. All mainframes must be
connected to the GPIB bus and have their Input Trigger Connector
connected to the Output Trigger Connector of the mainframe that the
Tunable Laser module is installed in.
If one of the following circumstances occurs, the "parameter mismatch"
error will be returned:
1 If one Power Meter is out of the specification at 1550 nm, the error
"powermeter wavelength does not span 1550nm" will be returned. For
example, the HP 81530A Power Sensor and the HP 81520A Optical
Head are out of specification at 1550 nm. Remove the Power Meter
that is out of specification at 1550 nm from the mainframe.
2 If the Step Size is too small and results in a trigger frequency that is to
high for the installed Power Meters, the error "could not calculate a
sweep speed!" will be returned. Increase the Step Size.
3 If the chosen wavelength range is too large and Step Size is too small,
the error "too many datapoints to log!" will be returned. In this case,
reduce the wavelength range and/or increase the Step Size.
The Get MF Lambda Scan Parameters Function
The Get MF Lambda Scan Parameters
(hp816x_getMFLambdaScanParameters_Q) function returns all
parameters that the Prepare Multi Frame Lambda Scan
(hp816x_prepareMfLambdaScan) function adjusts or automatically
calculates.
The Execute Multi Frame Lambda Scan Function
The Execute Multi Frame Lambda Scan (hp816x_executeMfLambdaScan)
function runs a Lambda Scan operation and returns an array that contains
the wavelength values at which power measurements are made.
Use the values returned from the Prepare Multi Frame Lambda Scan
(hp816x_prepareMfLambdaScan) function to set the parameters of the
Execute Multi Frame Lambda Scan (hp816x_executeMfLambdaScan)
function.
The Keysight 816x VXIplug&play Instrument Driver 7
279