ACC RC-85 Owner's Manual page 83

Chapter 8
Interfacing to Other Equipment
Contents
8-1 Introduction
8-1 PL Decoder
8-3 Talking S-Meter
8-3 Control Receiver
8-4 Site Alarm
8-5 Remote Control Outputs
8-7 Expanded Remote Control Outputs
8-9 Spare Audio Source
8-9 External Tape Player
8-9 Digital Voice Recorder
8-10 Sharing the Phone Line
Introduction
The basic interface of the RC-85 controller to the repeater system was described
in detail in Chapter 2. There are many additional features of the controller
which may optionally be used in your repeater. This chapter describes
interfacing of those additional features to your repeater system.
PL Decoder
A PL decoder may be connected to the RC-85 controller to permit PL access and/
or control. Any decoder with an active high logic output may connect to the PL
Logic Input on connector J3 (Logic Connector). A logic low must be less than .8
volts, and a logic high greater than 2.4 volts. If the decoder's output is "open-
collector", tie a pullup resistor, approximately 10K, from the output to the 12
volt supply.
A popular tone decoder is the Communcations Specialists TS-32. The diagram
below shows how the TS-32 may interface with the repeater receiver and the
RC-85 controller (it is shown for PL decode only - the encode section may be used
as you wish). The active high logic output (OUT-2) may drive the controller PL
logic input (J3 pin 4) with a 10K pullup resistor to +12 volts. It's necessary to
ground the Hang-up pin on the TS-32 to enable decoding.
(Interfacing to Other Equipment)
RC-85 Repeater Controller Owner's Manual
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