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Performing a Measurement
Keysight N7700 Photonic Application Suite, Fast Spectral Loss Engine, User's Guide
The measurement engine performs data synchronization with the
wavelength scale, based on power meter type, range and averaging time.
For optimum measurement results, the averaging time should be
determined by the measurement engine, so the Auto check box next to the
Averaging Time control should be checked.
Best dynamic range is achieved for high averaging times, while highest
wavelength resolution may require low averaging times unless low sweep
rates are used. If the Auto check box next to the Averaging Control is
checked, the engine chooses the appropriate averaging time based on the
selected wavelength step size. User higher step sizes for reduced noise
and increased dynamic range.
All of the above applies to reference sweeps as well, except that those
don't support stitching.
Before starting a measurement, perform the following steps:
•
Ensure that the Measurement Setup parameters suit your measurement
task (see
Application Setup Parameters
•
Check the Port/Ref. Manager to make sure that all the power meter
ports you want to incorporate into the measurement are selected.
•
In the Port/Reference Manager you can also perform reference
measurements, that subsequent measurements are referenced to. Any
port that has no reference data stored will be referenced to the TLS
power set in the measurement parameters. Best performance will be
achieved if reference data has been stored for each port.
Use the measurement controls as described below:
•
Run Single: You can perform single measurements by clicking Run
Single.
•
Run Repeat: By clicking Run Repeat the software will perform single
measurements in a repeat mode.
Fast Spectral Loss Measurement Application
on page 27).
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