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OLP-85/OLP-85P
69
R
EMOTE
R
EFERENCING
11 A
PPENDIX
- R
EFERENCING
M
ETHODS
Two jumper cable reference
This reference removes the losses at Connection 1,
Connection 2, and Connection 4 from the measurement.
Fig. 24 Two jumper reference - unidirectional
Fig. 25 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