FX80 PON Optical Power Meter User Manual
Page 22 of 38
•
REF MEM
command: extracts the previous reference level.
•
REF OFF
command: makes the previously stored reference level inactive. The
measurement result is then shown in
dBm
. After selecting this option, its name changes
onscreen to
[ REF ON ]
.
•
REF ON
command: makes the previously stored reference level active. To make the
current optical power the reference level, first select
[ REF FIX ]
, then
[ REF ON ]
. The
measurement result is then shown in
dB
(see an example below). After selecting this
option, its name changes onscreen to
[ REF OFF ]
.
•
REF +/-
command: finely adjusts the current reference level. Press the
|Up|
and
|Down|
buttons to change the reference level by 0.01. To set the adjusted level as reference, press
|Shift/Enter|
. To exit without setting, press
|F3|
(EXIT)
.
Broadband measurement taken against a reference level
6.4
Visual Fault Locator (VFL)
The FX80 can be equipped with a Visual Fault Locator (VFL).
To test a fiber line for continuity:
1. Connect the fiber to the VFL port.
2. Press the
|MODE|
button until get the VFL mode appears (see the Figure below).
