DS2460Q QAM Analysis Meter Operation Manual
86
standard OPM. Example, the standard OPM
measurement results is -5dBm, your OPM
measurement results is -6dBm, it means your OPM
has 1dBm offset for a long time using. You need do
some compensation by yourself. Now you enter 1dBm
in OFFSET position on one wavelength, press enter
button, quite compensation menu. Now you
measurement same signal, you can find the test result
display -5dBm (-6dBm +1dBm=-5dBm), same with
standard OPM. You can use your OPM for a long time
again. Several months later, you need compare with
standard OPM again, if your OPM has offset, you need
compensation again.
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