KI6503 48-Channel Optical CWDM Power Meter
User Manual KI6503 48-Channel Optical DWDM Power Meter Revision 1
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6.6 Absolute (dBm) / relative (dB) measurement modes
In PM (Power Meter) Modes, press [dB/dBm] to toggle between absolute and
relative measurement modes.
When relative mode is selected, the displayed power will be become “0.00
dB”, see figure below.