8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide 273
The Keysight 816x VXIplug&play Instrument Driver 7
Lambda Scan Applications
These functions combine multiple SCPI commands into a single, functional
operation. They are designed to allow quick and easy access to common
instrument command sequences.
These application functions allow you to perform one of the following
applications:
• A Lambda Scan - a measurement operation where a Keysight
Lightwave mainframe with a continuous sweep tunable laser module
and up to four power meters installed, performs a wavelength sweep
while the power meters are synchronized to record optical power.
• A Multi Frame Lambda Scan - a measurement operation where a
Keysight Lightwave mainframe with a continuous-sweep tunable laser
module performs a wavelength sweep in coordination with power
meters that are installed in the same mainframe or in other
instruments. These additional instruments must be connected to the
PC and have their input rigger connector connected to the output
trigger connector of the laser mainframe. The Multiframe LambdaScan
also provides more flexibility in configuring the measurement
parameters. The N774x-series multi-port power meters are also
supported..
The following two functions apply to both Lambda Scan and Multi Frame
Lambda Scan applications:
• The Set Lambda Scan Wavelength
(hp816x_set_LambdaScan_wavelength) function allows you to use a
different wavelength than 1550 nm during a Lambda Scan operation.
All Power Meters taking part in the Lambda Scan operation will be set
to the chosen wavelength.
• The Enable High Sweep Speed (hp816x_enableHighSweepSpeed)
function was used with older model lasers and enables/disables the
highest available sweep speed (40 nanometers per second) for Lambda
Scan operations. The Lambda Scan operation chooses the highest
possible sweep speed for the chosen step size.
• If you choose Enable, the highest sweep speed possible will be used.
This may lead to less accurate measurements.
• If you choose Disable, the highest sweep speed will not be used.
Equally Spaced Datapoints
A linear interpolation is performed on all wavelength and power data for
the Lambda Scan Application and is optional for the Multi Frame Lambda
Scan Application.
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