276 8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
7 The Keysight 816x VXIplug&play Instrument Driver
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 Lambda Scan Parameters Function
The Get Lambda Scan Parameters
(hp816x_getLambdaScanParameters_Q) function returns all parameters
that the Prepare Lambda Scan (hp816x_prepareLambdaScan) function
adjusts or automatically calculates.
The Execute Lambda Scan Function
The Execute Lambda Scan (hp816x_executeLambdaScan) function runs
and returns the results of a Lambda Scan operation.
That is, it executes an operation where a Keysight Lightwave mainframe
with a continuous-sweep tunable laser module and up to four power
sensors installed, performs a wavelength sweep.
The Prepare Lambda Scan (hp816x_prepareLambdaScan) function must
be called before a Lambda Scan operation is executed. Use the return
values of this function (Number of Datapoints and Number of Power
Arrays) to allocate arrays for the Execute Lambda Scan
(hp816x_executeLambdaScan) function.
Equally Spaced Datapoints is enabled as part of this function and cannot
be disabled. Use Multi Frame Lambda Scan if you need to have inequally
spaced datapoints. See Equally Spaced Datapoints on page 273 for more
details.
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