GTR 8000 Base Radio
1.1.1 GPW 8000 Receiver
A receive-only conventional GPW 8000 Receiver consists of a transceiver module, fan module, and power supply.
The transceiver module includes the functionality for the receiver and station control with or without an optional
transceiver option card. The receiver software, configuration, and network management, as well as inbound traffic
handling, are performed through the transceiver module. On-board serial and Ethernet service ports are on this
module for local servicing through CSS. The power supply module supports the transceiver module. Radio
Frequency Distribution System (RFDS) provides the interface between the receiver and the site antennas.
The receiver provides all the receive function of a GTR 8000 Base Radio as a receive-only station in a Conventional
Architecture or ASTRO
®
3.1 Conventional System. The receiver operates in a voting environment with connection
to a comparator providing additional receive only stations in areas where it would otherwise be difficult to receive
a signal from low-power subscriber units. The receiver also operates as a monitor receiver in a non-voting
environment with connection to a console.
1.2 GTR 8000 Base Radio/GPW 8000 Receiver
Components
Table 1-1
Base Radio/Receiver Modules and Function
Base Radio/Receiver
Description
Power Supply
Operates from either an AC or DC input and provides
the DC operating voltage for the base radio. If
installed, also provides a separate battery charger,
which can be used to maintain the charge on a 48 VDC
nominal system, positive or negative ground.
Power Amplifier (PA)*
Accepts a low-level modulated RF signal from the
transceiver module and amplifies it for transmission
through the site transmit antenna. Also provides
a low-level RF feedback signal to the transceiver
module to achieve the required transmitter linearity.
Also performs functions related to the fan module.
Transceiver (XCVR)
Provides the control, exciter, and receiver functions
for the base radio.
The exciter functionality is turned off in the
GPW 8000 Receiver.
1-2
6871022P86-B - July 2013