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4. CONTROL INTERFACE CONNECTOR DESCRIPTION
A 25 position D-sub connector for remote control is provided on the front panel of KG506.
The functions of each pin are as follows;
1 CH 0, 1
2 CH 1, 2
3 CH 2, 4
4 CH 3, 8
5 CH 4, 16
6 CH 5, 32
7 GROUND
8 RSSI
9 DISC. OUT
10 SQ. CONT.
11 BUSY
12 MUTE
13 MOD-1
14 GROUND
15 PTT
16 MOD-2
17 SIMPLEX
18 ERROR
19 DECODE
20 RX AUD-1
21 RX AUD-2
22 TX OUT
23 EXT. POW SW
24 VOLUME
25 +12V (nom)
CN1 Mini phone jack
71-506-10D FULL-DUPLEX MOBILE
apply 1 to 6 bits of binary input to pins 1 thru 6 to select 64
channels, pull "LOW" for active state. Pin 1 is LSB.
MSB
Ground
Receive Signal Strength Indication, 0 to 5 V DC
Discriminator audio output, low level
To external Squelch control, 10K pot to ground
Goes to 5V logic high when squelch is opened by signal
When pulled low, mutes RX and Repeat audio
Microphone modulation input
Ground
Pull low to transmit
Digital modulation input, TTL level, DC sensitive
Provides logic output during simplex operation
Provides "flashing" high/low if error/alarm is present
Logic low upon decoding 5-tone or DTMF code
With pin 21, provides balanced "0 dBm" audio
With pin 20, provides balanced "0 dBm" audio
Indicates error in PA, low power or high SWR
Connect to ground through external POWER switch
To external volume control, 10 K pot to ground
Switched 13.6 VDC to external accessories
Balanced Speaker output both sides above ground.
7
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