80
OLT-85/OLT-85P
13 A
PPENDIX
- R
EFERENCING
M
ETHODS
L
OOPBACK
AND
R
EMOTE
R
EFERENCING
Fig. 28 Loopback Referencing: 1-jumper cable (
1
), 2-jumper cable (
2
),
3-jumper cable (
3
)
Remote Referencing
One jumper cable reference
This reference removes the losses at Connection 1 and
Connection 4 from the measurement.
Fig. 29 One jumper reference - unidirectional
TX
RX
TX
RX
TX
RX
1
3
2
TX
Laser source output (Transmitter)
RX
Powermeter input (Receiver)
C1
C4
TX
RX
S
P