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Remote Fiber Node (RFN) User Manual
©Copyright 2011, Fiber-Span Page 12 of 38
6.5. Cellular
The CELLULAR Plug-in is a bi-directional service module comprising of uplink and downlink
circuitry. Internally it houses all the devices that conditions, filters and amplifies the specified
frequency band while rejecting the adjacent family bands operating within the chassis.
Although it accommodates both paths, circuitry is kept shielded providing 120 dB of isolation
between them which prevents any RF crossover.
Circuitry is similar in the UL and DL paths, with uplink RF Gain at 40 dB while the downlink
has more gain, with the addition of a high power amplifier module that provides 40 dB to drive
the DAS for a total of 70 dB from end to end. In both directions, inserted between the pre-
amplifier and mid-amplifier is an attenuator with a 31 dB adjustment range.
Instrument operates in the UL 824-849, DL 869-894 MHz
Figure 5 displays RF connections in rear.
6.6. Extended PCS
The Extended PCS Plug-in is a bi-directional service module comprising of uplink and
downlink circuitry. Internally it houses all the devices that conditions, filters and amplifies the
specified frequency band while rejecting the adjacent family bands operating within the chassis.
Although it accommodates both paths, circuitry is kept shielded providing 120 dB of isolation
between them which prevents any RF crossover.
Circuitry is similar in the UL and DL paths, with uplink RF Gain at 40 dB while the downlink
has more gain, with the addition of a high power amplifier module that provides 40 dB to drive
the DAS for a total of 70 dB from end to end. In both directions, inserted between the pre-
amplifier and mid-amplifier is an attenuator with a 31 dB adjustment range.
Integrated with the Extended PCS plug-in is E911 input port that provides capability for an
emergency signal path that is combined, condition, and amplified using the same downlink
output power amplifier module. Because it is transparent not external peripherals required.
Instrument operates in the UL 1850-1915, DL 1930-1995 MHz region.
Figure 5 displays RF connections in rear.
Note: the rear plug-in RF connections shown in this section, upon looking into the RFN
chassis (facing you), the connections are mirrored.