10
TEST PROCEDURES
OPTICAL POWER MEASUREMENT
Connecting the PON power meter to the FTTx network
Optical Power Measurement
In Optical Power mode, the PON meter
does not compare optical power
measurements to any specific threshold.
To view results in Optical Power mode, it
may be necessary to press the
F/P
button
so that PASS/FAIL/WRNG are not
displayed, and
Optical power can be displayed in dBm, dB, or
microwatt (uW) measurement units. Press the
dBm/dB
button to display until the desired
measurement unit appears on the display.
the indicator LEDs are not lit.
To view optical power in dB units, an optical
reference must first be set for all
wavelengths. See the “SET/VIEW
REFERENCE” section for instructions.
Measures upstream
signals coming from
customer equipment
(ONT: 1310nm)
ONT
Measures downstream
signals coming from
CO/head-end equipment
(OLT: 1490 / VDO:1550nm)
OLT
---------------------
ONU:
1310nm
dBm
OLT:
VDO:
1490nm
dBm
1550nm
dBm
-24 72
-12 37
+ 3 47
