Installation
C-1
Appendix C
Installation
Theory of Operation
Great care was taken in the design of the controller to make it installer-friendly.
Audio and digital interfaces are universal in nature, so that a minimum of
external hardware is needed to complete the installation. Although the
controller’s “engine” is a powerful microprocessor, the command language is
designed to be flexible and easy to learn.
Pre-Programming
The controller needs to know your repeater’s callsign for its Identifier. You also
must tell it your choice of Courtesy Message, Transmitter Timeout Timer, and
so on. You can program the controller on your workbench, with an external
DTMF pad and other devices to simulate the repeater, or you can program the
controller after installation through one of the receiver ports.
Default Information
To make the installation easier, the controller comes pre-programmed with
certain default information stored in non-volatile memory. This is refered to as
the Default Condition of the device.
When you have finished the installation, you may overwrite the pre-
programmed default conditions by entering DTMF commands. Likewise, if it
ever becomes necessary, you may also force the controller into its original
default condition by using the Initialize Push-Button during a power-up
sequence. This procedure is explained in the Getting Started chapter on
page 2-1.
This initialize push-button procedure causes the controller to read the default
condition information from the EPROM and write it over the old information
stored in the non- volatile memory.
Power Supply
The controller has a modest power requirement which can be supplied by the
repeater’s power supply in most cases. The controller requires 12VDC at
approximately 125mA (Main Board with Telephone Interface Module). The
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