80
ORL-85/ORL-85P
13 A
PPENDIX
- R
EFERENCING
M
ETHODS
R
EMOTE
R
EFERENCING
Two jumper cable reference
This reference removes the losses at Connection 1,
Connection 2, and Connection 4 from the measurement.
Fig. 27
Two jumper reference - unidirectional
Fig. 28
Two jumper reference - bidirectional (switching source and
powermeter mode)
The losses (Δ) at Δ
Conn. 1
, Δ
Conn. 2
and Δ
Conn. 4
are referenced out,
so the loss measurement is as follows:
Measured loss = Δ
FiberUnderTest
+ Δ
Conn. 3
C1
C4
TX
RX
S
P
C2
C1
C4
C1
C4
TX
RX
RX
TX
S
P
P
S
C2
C2
C1
Connection 1
C4
Connection 4
C2
Connection 2
TX
Laser source output (Transmitter)
RX
Powermeter input (Receiver)
S
Source device
P
Powermeter device