Tektronix OM4006D, Руководство пользователя

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Operating basics
page 115, Hybrid calibration (RT) .), put the following statement in the Engine
Command Window in the OUI before the DispCalEllipses statement:
CorrectPhase = true;
The resulting pHyb statement replaces the one in step 1. Hybrid Calibration
is optional if the receiver gain and phase accuracy is good enough to be
approximated by the ideal hybrid model in step 1.
After connecting and calibrating the receiver, it is ready for use with the OUI
software.
To emulate the behavior of a deployed receiver:
The OM4000 product is an analyzer for understanding the physical
performance of transmitters and optical communication links. It uses fi xed
calibration parameters to remove uncertainties. Deployed receivers will run
algorithms to correct in real time for skew, gain, and phase errors of the
receiver, being concerned more about data integrity rather than physical
measurement accuracy. To emulate this function of the receiver, it is important
to follow the calibration steps 1- 3, and to repeat the calibration when the
receiver properties change.
A deployed receiver will also run an adaptive algorithm that optimizes the
frequency response of the receiver. To emulate this function, use the adaptive
fi lter algorithm provided (you may have to ask for this as it is distributed
separately.)
56 OM4000D Series Coherent Lightwave Signal Analyzer