Motorola ASTRO 25 GTR 8000 User Manual

2.3
RFDS Modules
The Radio Frequency Distribution System (RFDS) equipment included in your system depends on
which options were purchased from Motorola Solutions. The following are some examples of the RFDS
equipment available for your system.
NOTICE: If the RTTE option was selected, a duplexer is required for applicable applications.
2.3.1
RFDS Preselector (700/800 MHz)
The preselector provides a first level of band pass filtering for inbound RF signals. RF input and output
connectors are cabled to the RF Output RX-A. This filter must be included to fulfill TIA102-CAAB Class
A spurious response rejection (90 dB). The filter is not required when using a receiver multicoupler
system. This filter CANNOT be retuned in the field.
Figure 16: Preselector Filter (700/800 MHz)
2.3.2
RFDS Preselector (UHF)
The preselector rejects unwanted signals including the transmitter signals from overloading the
receiver. This filter must be included to fulfill TIA102-CAAB Class A spurious response rejection (90
dB). The filter is not required when using a receiver multicoupler system. This filter can be retuned in
the field.
MN003286A01-E
Chapter 2: GTR 8000 Base Radio Theory of Operation
71

Motorola ASTRO 25 GTR 8000 Specifications

General

Brand	Motorola
Model	ASTRO 25 GTR 8000
Category	Radio
Language	English