Keysight Technologies 86120B, User Manual

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57
Using the Multi-Wavelength Meter
Measuring Laser Separation
Channel separation
Suppose that you want to measure separation on a system having the spectrum
shown in the following figure.
The Agilent 86120B displays separation on this spectrum as shown in the following
figure. Notice that the 1541.747 nm laser line is selected as the reference. It is shown
in absolute units. The wavelengths and powers of the remaining responses are
shown relative to this reference. For example, the first response is 2.596 nm below
the reference.
To determine channel spacing, simply read the relative wavelength measurement of
the laser lines immediately preceding and following the reference. Use the
, ,
and SELECT softkeys to change the reference laser line and read the channel spac-
ing between each channel.
To measure channel separation
1 Press the front-panel Preset key.