Cisco GS7000, Installation And Operation Manual

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Optical Analog Transmitter Modules
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Optical Analog Transmitter Modules
Optical Analog Transmitter Module Descriptions
The optical analog transmitter module takes in reverse band RF signals and puts out
optical signals. The 1.2 GHz GS7000 Node is designed to work specifically with the
existing mid gain, temperature compensated DFB optical transmitters. Other mid
and high gain optical transmitters may be installed in the 1.2 GHz GS7000 Node
with varying effects on the overall node specifications. The new module cover fits on
all existing optical transmitters. This module cover has a sliding tray incorporated
into it allowing the transmitters fiber pigtail to be spooled up and contained within
the transmitter module. This greatly improves fiber management within the node.
The optical transmitter modules plug directly into the optical interface board via a
connector header and are secured in place with two screws. Output attenuator pads
are provided on the optical interface board for each transmitter mounted in the
housing lid.
RF test points are accessible through holes in the module housing. The optical power
test point for the optical transmitter module has a scaling ratio of 1 V = 1 mW. A -20
dB RF power test point is accessible through the module top cover.
The top cover contains a status monitor LED. Each optical transmitter module laser
power indicator turns off when the laser power output falls outside the alarm
threshold. It is on (green) when within the alarm threshold.