Viavi SmartClass OLP-85 Series Operating Manual page 69

TX
C1
S
OLP-85/OLP-85P
Two jumper cable reference
This reference removes the losses at Connection 1,
Connection 2, and Connection 4 from the measurement.
C2
TX
C1
S
Fig. 24 Two jumper reference - unidirectional
C2
RX
C4
P
Fig. 25 Two jumper reference - bidirectional (switching source and
powermeter mode)
C1 Connection 1
C4 Connection 4
C2 Connection 2
TX Laser source output (Transmitter)
RX Powermeter input (Receiver)
S Source device
P Powermeter device
The losses (Δ) at Δ
Conn. 1
so the loss measurement is as follows:
Measured loss = Δ
FiberUnderTest
11 A
PPENDIX
RX
C4
P
C2
RX
C1
P
, Δ and Δ
Conn. 2 Conn. 4
+ Δ
Conn. 3
- R M
EFERENCING ETHODS
R R
EMOTE EFERENCING
TX
C4
S
are referenced out,
69