68
OLP-85/OLP-85P
11 A
PPENDIX
- R
EFERENCING
M
ETHODS
R
EMOTE
R
EFERENCING
Fig. 22 One jumper reference - unidirectional
Fig. 23 One jumper reference - bidirectional (switching source and
powermeter mode)
Measured loss = Δ
Conn. 2
+ Δ
FiberUnderTest
+ Δ
Conn. 3
This reference removes any loss at the connection between the
instrument in source mode and the reference test jumper (both
directions). However, the loss at the connection from instrument
in source mode‘s reference jumper to the fiber under test and
the connection from the fiber under test to the instrument in
powermeter mode‘s reference jumper will not be referenced out.
C1
C4
TX
RX
S
P
C1
C4
C1
C4
TX
RX
RX
TX
S
P
P
S
C1
Connection 1
C4
Connection 4
TX
Laser source output (Transmitter)
RX
Powermeter input (Receiver)
S
Source device
P
Powermeter device