FS FOPM-201 - Page 15

(2) P/F Test Mode
P/F test mode means the measured light power comparing to a preset threshold value
to determine if the measured light power meets user’s requirement or not. LCD will
display the optical power and current state. The LED indicators below the LCD display
will also change color to match the current state of measured light. This test mode is
very useful in some special cases required. See Fig. 2.
units: dB and dBm, using button to switch. See Fig. 1.
Unit dBm is to display the actual power.
Unit dB is to display a power value relative to a reference value. In this mode, reference
value needs to be preset correctly.
dBm/dB
10-03-03 11: 43: 15
1310nm
1.2
-4.5
-15.0
1490nm
ONU
dB
dB
dB
Auto off
OLT
1550nm
VIDEO
Fig.1 Normal Test Mode Menu (dB)
10-03-03 11: 43: 15
1310nm
1.2
-4.5
-15.0
1490nm
ONU
dBm
Pass
Fail
Warning
dBm
dBm
Auto off
OLT
1550nm
VIDEO
Fig.2 P/F Test Mode Menu