User's Manual

Remote Fiber Node (RFN) User Manual
©Copyright 2011, Fiber-Span Page 10 of 38
Although it accommodates both paths, circuitry is kept shielded providing 120 dB of isolation
between them which prevents any RF crosstalk.
The iDEN uplink has 2 independent internal inputs that combined iDEN 8 and iDEN 9
allocated bands. Downlink last stage output power amplifier accommodates both iDEN 8 and
iDEN 9 frequency bands.
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 iDEN8: UL 817-824, DL 862-869, iDEN9: UL 896-902, DL 935-
941 MHz regions.
Figure 4 displays Plug-in iDEN RF connections in rear.
Figure 4
6.3. AWS
The AWS 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 AWS 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.