Cisco GS7000, Инструкция по установке и эксплуатации

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Optical Receiver Module
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Optical Receiver Module
Optical Receiver Module Description
The optical receiver module takes in optical signals and puts out forward band RF
signals. The module cover has a sliding tray incorporated into it allowing the
receivers fiber pigtail to be spooled up and contained within the receiver module.
This greatly improves fiber management within the node.
The optical receiver modules plug directly into the optical interface board via a
connector header and are secured in place with two screws. Input attenuator pads
are provided on the optical interface board for each receiver mounted in the housing
lid.
All optical receiver test points are provided and are accessible through holes in the
module housing. The optical power test points for the optical receiver module has a
scaling ratio of 1 V = 1 mW. A -20 dB RF power test point is accessible through the
front panel.
The optical receiver module has an optical power LED to indicate the presence of
optical power that is either above or below the specified range. ON indicates optical
power is within operating limits and OFF indicates that optical power is below the
alarm threshold.
The optical power level into the optical receiver module is monitored by the status
monitor or local control module. When the node is setup for redundant optical
receiver operation, a digital signal is generated by the status monitor or local control
module to switch between the primary and redundant optical receiver module in the
forward configuration module.