Radio Control - Motorola ENLN4056 Manual

Functional Description
1.1

Radio Control

1.1.1 Single Radio/Dual Radio Operation
As described in the Introduction, the ENLN4056 (TRICK) is capable of interfacing to either one or
two mobile radios.
Single radio application is limited to base station operation. In this configuration all signals and logic
commands are routed to a single radio from a single connector on the TRICK.
Dual radio operation is supported for base station and/or repeater operation. In this configuration,
TX audio and TX control signals are routed to the TX radio and RX audio and control signals are
routed to the RX radio, using two connectors on the rear of the TRICK.
Selection of single radio or dual radio operation is made via the RSS.
1.1.2 Radio Connections
The TRICK connects to the accessory connector on the rear of the mobile radio via a 16 way cable.
The accessory connector pin-outs are provided in the Installation and Programming Guide and
Chapter 1 of the Service Manual.
The radio accessory connector must be programmed using the radio RSS software to ensure
compatibility with the TRICK. The appropriate radio configuration is described in the Installation and
Programming Guide.
The radio signal levels are preset according to the selected radio type. Further details are provided
in the Technical Specification in Chapter 1 of the Service Manual. Using the RSS it is possible to fine
tune the RX and TX levels between -3dB and +3dB.
1.1.3 Programmable Start-up Channel
The TRICK may be programmed using the RSS to revert to a pre-defined channel number at
start-up. This function is useful in situations where power may be interrupted at the base station/
repeater site.
When the TRICK powers up, it will switch to the pre-defined channel and, if programmed, will send a
'status update' to update the wireline control console.
1.1.4 Signalling Standards
The TRICK is able to decode and encode the following 5 tone signalling standards;
Standard ZVEI
French ZVEI
Modified ZVEI
100ms CCIR
70ms CCIR
EEA
A table showing tone frequency values for each signalling format is provided in Appendix A of this
Manual.
1-2 Functional Description & Applications