CBR-7 Installation and Testing
501-281, Rev C.0
7
Attenuation Measurement
Determine the light output level of the CBR-7 transmitter. Disconnect all patch cables from the
transmitter. Connect a coaxial cable between the Test and the A connectors of the CBR-7.
Connect a light meter to the transmit connector. Power the CBR-7 and measure the transmitter
light level.
CBR-7
A
B
XMIT
Rec
TEST
-5 dBm
Light
Meter
Disconnect the light meter from the transmitter. Connect the patch cable to the transmitter and
all the other optical components. Measure the light level at the receiver of the corresponding
CBR-7 repeater. This should be close to the level measured at the transmitter minus the
calculated attenuation determined at design.
Patch
Cable
Patch
Cable
Cable
Pa
tc
h
Pa
n
e
l
Pa
tc
h
Pa
n
e
l
Attn
CBR-7
A
B
XMIT
REC
TEST
-11.2dBm
Light
Meter
