*** TECHNICAL INFORMATION FOR THE WB6JHQ REPEATER CONTROLLER AND AUDIO MIXER ***

        THE CONTROLLER CARD HAS 4, TTL LEVEL, SENSE LINES.  THEY ARE THE COR
(CARRIER OPERATED RELAY),  PL (PRIVATE LINE), CPL (CONTROL PL), AND XMT
EXTERNAL TRANSMITTER KEYING.  ALL INPUTS ARE TTL ( 5 VOLT ) LOGIC.  DO NOT
APPLY ANY VOLTAGES HIGHER THAT 5 VOLTS.  USE OPEN COLLECTOR DRIVERS OR TRANSISTORS
TO PULL THE LINES TO GROUND.  ALL INPUTS ARE GROUND ACTIVE.

        THE COR LINE IS USED TO SENSE WHEN A CARRIER IS PRESENT AT THE REPEATERS
RECEIVER.  THIS IS THE SAME AS SENSING THAT THE RECEIVER SQUELCH IS OPEN.
THE CONTROLLER WILL YOU THIS LINE TO KEY THE REPEATER (TRANSISTOR T5) WHEN PL
MODE IS OFF AND WHEN THE REPEATER FUNCTION IS ON.  THIS LINE IS ALSO USED TO KEY
THE REMOTE BASE TRANSMITTER (TRANSISTOR T2) WHEN THE REMOTE BASE FUNCTION IS ON.
IF USING A G.E. MASTER II YOU WILL HAVE TO ADD A 2N2222 OR 2N3904 TO INVERT THE CUS
LINE.  PUT A 10K RESISTOR FROM CUS LINE TO BASE OF TRANSISTOR AND OPEN COLLECTOR
OF TRANSISTOR TO THE COR INPUT OF THE CONTROLLER CARD.  ALL LINES GOING INTO/OUT OF

        THE PL LINE IS USED TO SENSE WHEN THE PL DECODER HAS SENSED THE SPECIFIED
PL TONE SELECTED.  WHEN THE REPEATER IS SET TO PL MODE THIS LINE WILL KEY THE
REPEATER AND REMOTE BASE, IF ENABLED, INSTEAD OF USING THE COR LINE.  IN THIS
CASE THE REPEATER WILL ONLY KEY UP WHEN THE CORRECT TONE IS DECODED BY THE
CTCSS DECODER. (ie. COMSPEC TS-32 ETC.)

       THE CPL LINE IS USED FOR RING DETECT OF HAMTRONICS AUTOPATCH CARD.

      THE XMT LINE IS USED THE SAME AS THE COR LINE BUT COMES FROM THE
REMOTE BASE RECEIVER.  IT MAY BE EITHER COR OR PL DECODER SOURCED.  PULLING
THIS LINE TO GROUND WHEN THE REMOTE BASE FUNCTION IS ACTIVE WILL KEY THE
REPEATERS TX.

       ALL LINES GOING INTO/OUT OF THE CONTROLLER/MIXER ENCLOSURE SHOULD
BE BYPASSED WITH .01 MFD. CAPS AT PLUG.  I USE DB25 FOR THE CONNECTORS.
EMI FILTERS WOULD BE EVEN BETTER.  COMPUTERS GENERATE A LOT OF RANDOM
NOISE AND YOUR RECEIVER AND TRANSMITTER MAY PICK IT UP UNLESS YOU  ASSEMBLE
WITH GOOD SHIELDING.  USING RG174 FOR ALL AUDIO AND CONTROL LINES IS A GOOD IDEA.

      DIAGNOSTIC POR, POWER ON RESET, IS ACCOMPLISHED BY PULLING ALL THE
INPUT LINES TO GROUND VIA DIODES (SEE THE SCHEMATIC SUPPLIED) AND THEN POWER
ON THE CONTROLLER.  BY DOING THIS THE MICROCODE WILL BE PLACED INTO A DIAGNOSTIC
MODE.  THIS IS USED TO DETERMINE IF YOUR INPUT SENSE LINES ARE WORKING AND THAT
THE DTMF (TOUCH-TONE) DECODER IS WORKING.  THE LEDS ON THE CONTROLLER WILL
INDICATE THE STATE OF THE LINES AND THE DTMF BINARY OUTPUT. SEE REPEATER DOC.

        THE TRANSISTORS ARE ASSIGNED AS FOLLOWS USING THE NORMAL MICROCODE
SUPPLIED:             T1 USED TO CONTROL POWER TO THE REMOTE BASE RX/TX.
                      T2 USED TO KEY THE REMOTE BASE TX.
                      T3 MAY BE USED AS NEEDED.
                      T4 MAY BE USED AS NEEDED.
                      T5 USED TO KEY THE REPEATERS TX.
                      T6 USED AS SERIAL CLOCK OUTPUT TO 10 CH. MIXER BOARD.
                      T7 USED AS SERIAL DATA OUTPUT TO 10 CH. MIXER BOARD.
                               NOTE: THE TRANSISTORS MAY NEED TO BE CHANGED
                                     FROM MPS-A13 TO 2N3904.  THIS IS BECAUSE
                                     MPS-A13 ARE DARLINGTONS AND WILL NOT PULL
                                     TO LOGIC GROUND.

        THE CURRENT VERSION OF CODE WILL CONTROL AN LCD DISPLAY, HAMTRONICS
AUTOPATCH CARD, A DIGITALKER AND A REMOTE BASE.  THESE ADD-ONS ARE NOT AVAILABLE
FROM ME BUT I WILL SUPPLY THE SCHEMATICS FOR THE DIGITALKER, LCD DISPLAY AND
MODS TO HAMTRONICS AUTOPATCH CARD ON REQUEST.

TRANSISTORS T3 AND T4 ARE USED FOR THE AUTOPATCH CARD IF USED.  A PICTORIAL OF THE
REQUIRED CONNECTIONS TO AND FROM THE HAMTRONICS CARD WILL BE SUPPLIED ON
REQUEST ALONG WITH AN EXPLINATION OF MINOR MODS. TO THE CARD.

        OTHER CONTROLLER CARD INPUTS/OUTPUTS ARE:
                      J1-1  12 VOLTS POWER INPUT.
                      J1-2  NO CONNECTION.
                      J1-3  PULL TO GROUND TO RESET CONTROLLER.
                      J1-4  GROUND.
                      J2  DTMF TONE INPUT.  200 TO 400 MV P-P. FROM MIXER J16.
                      J3  ID TONE OUTPUT.  NORMALLY GOES TO MIXER J9.

        THE AUDIO MIXER BOARD INPUTS ARE USED AS FOLLOWS:
                      J1   FROM REPEATER RECEIVER. (SQUELCHED AUDIO)
                      J2   FROM REMOTE BASE RECEIVER. (SQUELCHED AUDIO)
                      J3   USE AS NEEDED.
                      J4   USE AS NEEDED.
                      J5   USE AS NEEDED.
                      J6   USE AS NEEDED.
                      J7   USE AS NEEDED.
                      J8   USE AS NEEDED.
                      J9   FROM CONTROLLER CARD COMPUTER AUDIO OUT J3.
                      J10  FROM THE CONTROL RECEIVER FOR THE DTMF DECODER.
                      J11  SERIAL DATA INPUT FROM T7 OF CONTROLLER CARD.
                      J14  SERIAL CLOCK INPUT FROM T6 OF CONTROLLER CARD.
                      J15  12 VOLT POWER INPUT.
                      J20  MAY BE USED AS A SQUELCH. NORMALLY NOT USED.
                      J22  NORMALLY NOT USED.

        THE AUDIO MIXER BOARD OUTPUTS ARE USED AS FOLLOWS:
                      J12  ATTACH TO A 4 TO 8 OHM SPEAKER.
                      J13  AUDIO OUTPUT FROM MIXER TO REPEATER TX.
                      J16  AUDIO OUTPUT FROM MIXER TO CONTROLLER J2.(DTMF INPUT)
                      J17  ATTACHED TO A SWITCH TO TURN AUDIO AMP ON/OFF.
                      J18  SERIAL CLOCK OUTPUT TO NEXT MIXER. REMOVE R13 IF USED.
                      J19  SERIAL DATA OUTPUT TO NEXT MIXER.
                      J21  ATTACHED TO A SWITCH TO TURN DB METER ON/OFF.

        SEE THE PICTORIAL DIAGRAMS SUPPLIED WITH THE CONTROLLER.