FX80 / FX81 PON Optical Power Meters User Manual
Page
28
of
50
6.3.2
Setting Power Reference Level
To measure the fiber insertion loss, first set a reference level for each test wavelength. Set the
reference level by pressing the
|F3| (OPTION)
button.
Selecting a reference option for PM measurement
•
REF
SET
function: sets the current power value as the reference level. Select
REF
SET
with
the cursor and press the
|Shift/Enter|
button. The value onscreen then changes to
--.—
dB.
The current reference level value is shown on the second row to the left (-6.86 dBm in the
example below). [
REF SET
replaces
REF FIX
in later firmware versions]
Current power value set as the reference level
