Chapter 1 General Information
of the RF plant that is already in place.
The GS7000 Node can be upgraded to a GS7000 Hub Node in the field. This is
accomplished by the installation of optical amplification (EDFA) modules, optical
switching modules, and the Status Monitor/Local Control Module in the node lid.
The GS7000 Hub Node can then serve as a traditional node feeding the local HFC
plant and as an optical hub with the optical amplifiers. The node hub with the
amplifiers can service up to 32 nodes at a distance of 50 km with only three fibers.
EDFAs are available in 17 dBm, 20 dBm, and 22 dBm for broadcast constant output
power. A 17 dBm, 20 dBm and 21 dBm narrowcast constant gain EDFA version is
available to fit any architecture for requirements like DWDM narrowcasting.
The optical switch module is used for switching the input of an EDFA module from
a primary signal to a backup or secondary signal. The switch is monitored and
controlled by the Status Monitor/Local Control Module (SM/LCM) in the node.
A specific model of the SM/LCM is required for use in the hub node. This SM/LCM
model monitors and controls several EDFA and optical switch parameters and
functions while continuing to monitor the standard node components.
Features
The 1.2 GHz GS7000 Node has the following features:
Six port 1.2 GHz RF platform
Uses rugged GaN Technology on the output stage
Uses standard GainMaker style accessories (i.e., attenuator pads, equalizers,
diplexers and crowbar)
Field accessible plug-in Forward Interstage Linear Equalizers,
Forward/Reverse Configuration Modules, and Node Signal Directors
3-state reverse switch (on/off/-6 dB) allows each reverse input to be isolated
for noise and ingress troubleshooting (status monitor or local control module
required)
Auxiliary reverse injection (5 - 210 MHz) configurable on up to 2 ports (port 3
or port 6)
Positions for up to 4 optical receivers and 4 optical transmitters in housing lid
Provides hub node functionality with addition of available optical amplifier
and optical switch modules
Optional low-cost Local Control Module may be installed in conjunction with
a Redundant Forward Configuration Module to allow optical forward path
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