Electrical Design; Trunking Capability - Motorola MTR2000 Installation And Operation Manual

Description

Electrical Design

Trunking Capability

2
Transmitter Circuitry
The station transmitter circuitry is designed for continuous duty operation and may
be operated at full rated power. Output power is continually monitored by an inter-
nal directional coupler. The forward power voltage from the coupler feeds a power
control loop which continually adjusts and maintains the desired output power. All
adjustments are electronic, including deviation and output power.
Receiver Circuitry
The station receiver circuitry features multiple bandwidth (12.5kHz, 20kHz, 25kHz,
and 30kHz) capability. Injection signals for the first and second mixers are generated
by frequency synthesizer circuitry electronically controlled by the Station Control
Module. All receive signals (analog) are detected and digitized before being sent to
the Station Control Module, providing improved, consistent audio quality through-
out the coverage area.
Station Control Module
The Station Control Module is microprocessor-based and features extensive use of
ASIC and digital signal processing technology. The module serves as the main con-
troller for the station, providing signal processing and operational control for the sta-
tion modules.
Wireline Circuitry
The station wireline circuitry options provide a wide variety of telephone interfaces
and control mechanisms such as Tone Control. Telephone line connections are easily
made to the wireline circuitry via connectors on the rear of the station.
When equipped for trunking capability, the station can operate in Motorola's Smart-
net™ or the most advanced wide-area trunking system – SmartZone. The station can
operate as a remote voice channel or control channel repeater. The station interfaces
to a Trunking Central Controller (TCC) which provides the call processing and chan-
nel assignment tasks.
68P81096E36-H
06/28/05