82
ORL-85/ORL-85P
13 A
PPENDIX
- R
EFERENCING
M
ETHODS
R
EMOTE
R
EFERENCING
The losses (
Δ
) at
Δ
Conn. 1
,
Δ
Conn. 2
,
Δ
Conn. 3
and
Δ
Conn. 4
are
referenced out, so the loss measurement is as follows:
Measured loss =
Δ
FiberUnderTest
This reference removes any loss at all the connections. A third
reference jumper is used. Just as with the other test jumpers, the
loss of this short reference jumper will not affect the loss
measurement.
By using a three-jumper reference, no connection loss is added
to the measured loss of the fiber under test.
C1
Connection 1
C4
Connection 4
C2
Connection 2
C3
Connection 3
TX
Laser source output (Transmitter)
RX
Powermeter input (Receiver)
S
Source device
P
Powermeter device