Often Asked Questions and Answers".
Touch-Tone is a registered trademark of American Telephone and Telegraph
Company.
Copyright (c) 1987 Advanced Computer Controls, Inc.
All rights reserved
Printed in U.S.A.
Specifications subject to change without notice
RC-850 Controller Software Copyright (c) 1983, 1987 ACC
RC-850 Controller Command Codes Copyright (c) 1983, 1987 ACC
8/87 Rev 3 Hardware Reference - 3
About This Manual . . .
This manual provides hardware reference information for the RC-850
Repeater Controller.
Table of Contents
1
Specifications and Features
Specifications ... 1-1
Features ... 1-2
Standard Features ... 1-2
Voice Response Telemetry Option ... 1-3
Computer Interface Option ... 1-4
Telephone Interface Option ... 1-4
Front Panel Display Option ... 1-4
2
Initial Installation
Power ... 2-2
Carrier-Operated Switch ... 2-3
Push-to-Talk ... 2-3
Receiver Audio ... 2-4
Transmitter Audio ... 2-4
Telephone Line ... 2-5
Setting DIP Switch Options ... 2-5
Setting Audio Levels ... 2-6
Interfacing to Specific Repeaters ... 2-7
3
Input / Output Characteristics
Logic Inputs ... 3-1
Logic Outputs ... 3-1
Audio Inputs ... 3-2
Audio Outputs ... 3-2
Analog Measurement Inputs ... 3-2
Serial I/O ... 3-3
4
Sub-Audible Tone
Controller PL Logic Inputs ... 4-1
Communications Specialists TS-32 ... 4-1
Comm Spec TP-38 Shared Repeater Tone Panel ... 4-2
Remotely Controlling the TS-32 / SS-32 ... 4-3
5
Control Receiver and Other Audio Sources
Control Receiver ... 5-1
Spare Audio 1 ... 5-1
Digital Voice Recorder ... 5-2
6
Courtesy Tone Selection Hardware Reference - 4
7
Telephone Interface
Telephone Interface Board ... 7-1
Second Local Phone Line ... 7-1
Remote Phone Lines ... 7-2
Sharing the Phone Line ... 7-3
Using An Existing Coupler ... 7-4
Dial Tone Detector ... 7-4
8
Remote Bases and Links
Receive Audio ... 8-1
Link Transmit Audio ... 8-1
COS and PTT ... 8-2
Frequency Control ... 8-2
Interface to ICOM IC-22U Synthesizer ... 8-4
Driving Two Shift Register Chains ... 8-4
Controlling an HF Remote Base ... 8-5
9
Alarms
10
General Purpose Remote Control
Remote Control Logic Outputs ... 10-1
11
Remote Metering
S-Meter ... 11-1
Quieting ... 11-3
Temperature ... 11-3
Voltage ... 11-6
Current ... 11-7
Power ... 11-8
Everything You Need to Know About Op Amps ... 11-11
12
Principles of Operation
Main Controller Board ... 12-2
Telephone Interface Board ... 12-5
Front Panel Display Board ... 12-6
Voice Response Telemetry Board ... 12-7
Computer Interface Board ... 12-8
13
Troubleshooting
Maintenance & Servicing ... 13-1
General Checklist ... 13-2
RF Interference ... 13-3
Appendix I
Controls, Indicators, Connectors, DIP Switches
Appendix II
Interface to Specific Repeaters
Appendix III
Adjustments
Appendix IV
Lightning Protection
(Appendix V
Schematics and Parts Placement Diagrams) Specifications & Features - 1
Hardware Reference - 5
Chapter 1
Specifications and Features
This chapter provides specifications and features of the RC-850 Repeater
Controller with Version 3 Firmware.
Specifications
Microprocessor: 80C85
Memory:
Total expandable beyond 384K bytes
EPROM 136K
E2PROM 8K bytes
RAM 8K bytes, expandable to 16K bytes
Logic Inputs: Low <.8 volts

High 2.415 volts

Impedance 10K

Programmable active high/low
Logic Outputs: VMOS power transistors (open drain)
60V / 100 mA drive capacity
Programmable active high/low
Audio Inputs: 100K impedance, adjustable levels
Audio Outputs: 5V p-p transmitter and link audio
Power: 11.5 to 15V DC @ 175mA
Operating Temperature: -15 to +55 degrees C (5 to 131 degrees F)
Cabinet size: 17" W x 14.5" D x 2.5" H, 19" rack mountable
Weight: Approximately 4 lbs. Specifications & Features - 1
Hardware Reference - 6
Features
Standard Features (on main controller board)
- Main controller board is a complete standalone repeater controller
- Remotely programmable with Touch-Tone commands:
Messages over 200 (ID's, tails, mailbox, etc.).
May include CW, paging tones, DTMF tones, external devices,
synthesized speech (w/VRT option), and Digital Voice Recorder
tracks (w/DVR)
Morse code parameters:
Speed 5-35 WPM, Pitch - DC-3000 Hz, Level - 4 steps
Control Op and user command codes (30 prefix groups, up to 7 digits
each)
Courtesy tone parameters (13 sets pitch, durations, spacings
fully programmable)
Timers 27 sets, 0-30 minute with 1 second resolution
Autodialer numbers (250)
Telephone exchange tables
Pager memories
Remote base frequency memories
Non-volatile E2PROM storage (no batteries)
- Autopatch / Autodial (requires Telephone Interface Option for local
line)
Supports up to two local phone lines, three remote phone lines (3
total)
Store/forward, DTMF or rotary (2 speeds each)
Optional phone number readback
User Loadable Autodial 240 numbers (50 numbers hold up to 35
digits)
Emergency Autodial (10 numbers) with message readback
Antidialer traps 10 numbers, permits wildcards and globals
for blocks of numbers
Toll restrict leading 1/0 and digit count; or exchange tables for
telephone exchanges in 2 area codes, 3 permitted area codes
Full or half duplex patch
Cover tone for semi-private patches
Activity timer with warning warble
Autodial storage of credit card / MCI / Sprint access codes
- Reverse patch - general or directed to 100 stored user call signs
- Paging two-tone, 5/6 tone, DTMF, CTCSS, HSC display, GSC digital,
commandable or may be included in any programmable messages
- Electronic Mailbox
User-to-user mail
System generated mail; system generated mail unanswered reverse
patch and alarms
Addressed by user call sign slot, 100 user call sign storage
10 "canned" messages; digits may be appended to messages,
i.e., phone numbers
- Remote bases and links
Up to 4 transceivers
Commandable frequency and offset of 2 transceivers
Remote base frequency memories with names
Cross-linking of the transceivers
Command entry from the remotes and links Specifications & Features - 1
Hardware Reference - 7
- 11 access and control modes
PL for access, user level, or Control Op level command
Main and "user level only" PL inputs
Touch-Tone access mode with programmable timeout
Individual user access codes for 800 users
Attributes for further custom tailoring
- 10 "Macro Sets" for easy Control Operator selection of predefined
repeater setup parameters
- General purpose remote control
Logic outputs 6 expandable to 64
- Audio delay line (75 ms) to mute squelch tails and fully mute Touch-
Tone
- Courtesy tone
13 sets to convey information
Selectable by Control Op or logic inputs
Programmable pitch, delay, and spacing of 3 segments per tone set
- Low distortion computer synthesized tone generation, single and dual
frequency, programmable to 1 Hz resolution, 4 levels
- Noise and kerchunker filtering
- Control receiver provisions
- Fully integrated CMOS 16 digit DTMF decoder
- Intelligent ID algorithm automatically selects from up to 14
programmable IDs
- Tail messages 13, selectable occurance rate
- Command acknowledgement with unique response messages
- Built-in E2PROM programmer/eraser for remotely programmed parameters
- Low power, single supply operation with built-in battery switchover
circuitry
- Fully socketed with top quality machine contact IC sockets for
reliability and easy service
- Proven reliability designed in, with watchdog timer, voltage
monitoring circuitry, transient protection, conservative design
- Compatible with ACC's Digital Voice Recorder
- Manual, free telephone technical support
Voice Response Telemetry Option
- Natural sounding speech synthesizer for effective user/repeater
interface
Custom ham/repeater oriented vocabulary of over 300 words,
expandable to over 600 words
Letters, numbers, phonetic alphabet
Amateur radio terms club net, meeting, hamfest, amateur, etc.
Male and female voices, sound effects
Easy to use interactive message editor
- Clock/calendar
Scheduler
10 "Setup States" storing over 200 parameters each
30 Time/day of week changeovers and events
Commandable readback of time
Time, date, and morning/afternoon/evening available as run time
variables in programmable messages Specifications & Features - 1
Hardware Reference - 8
- Analog metering
16 channel analog measurement
Readback on command and inclusion in any programmable messages
Immediate readings, and ongoing min/max readings for each channel
Firmware defined talking meter faces for voltage, current, S-
meter, deviation, quieting, power, temperature, weather
conditions, etc.
Built-in sensors for temperature and voltage
Internal telemetry logging
- Alarm inputs with programmable identification messages; leaves mailbox
message if alarm is not cleared
Computer Interface Option
- Two hardware RS-232 serial I/O ports
Firmware supports packet radio "bulletin board" like user
interface
Selectable baud rates
- Two auxiliary dedicated Touch-Tone receivers
- Three memory sockets for expansion to 384