Cisco GS7000 Installation And Operation Manual page 46

Chapter 2 Theory of Operation
circuitry. It does not include the thermal movement of the optical receivers.
Forward Configuration Module
The forward configuration module determines the forward path topology in the RF
amplifier module and the 1.2 GHz GS7000 Node. The output signals from one to
four optical receivers enter the forward configuration module where they are
combined and or directed to the two or four independent forward paths in the RF
amplifier module. Forward path segmentation and/or redundancy are set by
plugging the appropriate forward configuration module into the RF amplifier
module. The forward configuration module is a plug-in, field accessible module. See
Forward Configuration Module (on page 29) for more information.
Forward Band Linear Equalizer Module
The forward band linear equalizer module sets the overall forward path tilt of the RF
amplifier module and the 1.2 GHz GS7000 Node. The 1.2GHz GS7000 Node launch
amplifier is shipped with four 18.0 dB linear equalizers installed in the RF amplifier
module. One equalizer is installed in each of the four amplifier module forward
paths. This sets the nodes forward path tilt to 17.5 dB linear. Forward band linear
equalizer modules of other values are available. This allows the nodes forward path
tilt to be adjusted as needed. The forward band linear equalizer module is a plug-in,
field accessible module. See the equalizer charts in Appendix A - Technical
Information.
Node Signal Director Jumper/Splitter Module
The node signal director jumper/splitter module is a plug-in, field accessible module.
It is present on the center output ports on either end of the RF amplifier module. The
orientation of these modules determines where the RF amplifiers center output port
signals are directed. The node signal director jumper allows the center output port
signals to be routed to either the amplifiers primary center output port or to its
auxiliary corner output port. The node signal director splitter module splits the
center output port signals equally between the primary and auxiliary output ports.
Auxiliary Reverse Injection Director Module
The auxiliary reverse injection director module is a plug-in module. It is accessible
only after the RF amplifier modules cover has been removed. Auxiliary reverse
injection director modules are present on the auxiliary corner output ports on either
end of the RF amplifier module. The orientation of these modules determine if the
nodes auxiliary output ports are configured to be primary or split node output ports,
or local reverse injection ports.
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