RF Technology R220 Operation And Maintenance Manual page 10

RX PCB
The Receiver and Transmitter modules plug into the back plane DB25/F
connectors
Miniature spade connectors (2.1 x 0.6 x 7mm) are captive/ soldered at the labelled
points.
To configure: Solder wire connections between appropriate points
RX PCB
Receiver
DB25/F
1, 14 +12V
2 TXD
15 RXD
3 COR+
16 COR-
4 TONE
17 AUDIO
5 AGND
18 DISC
6 LINE+
20 LINE-
8 EXT SQ
13, 25 GND
21 BCD 1
9 BCD 2
22 BCD 4
10 BCD 8
23 BCD 10
11 BCD 20
24 BCD 40
12 BCD 80
Page 10
2 RECEIVER INTERNAL JUMPER OPTIONS
DESCRIPTION
+12V DC SUPPLY
TX Data
RX Data
Carrier Operate Sw+ PressToTalk input
Carrier Operate Sw- Tx/Rx output
Subtone output Hi Z audio input+
Audio output Hi Z audio input-
Audio Ground Ext tone input+
Discriminator output Ext tone input-
Line output+ Line input+
Line output- Line input-
Ext Squelch input Auto Level Control
Ground, 0V
Channel select 1's digit
Channel select 1's digit
Channel select 1's digit
Channel select 1's digit
Channel select 10's digit
Channel select 10's digit
Channel select 10's digit
Channel select 10's digit
TX PCB
.
TX PCB
Transmitter
DB25/F
+12V 1, 14
TXD 2
RXD 15
PTT 3
T/R 16
AUD+ 4
AUD- 17
TONE+ 5
TONE- 18
LINE+ 6
LINE- 20
ALC 8
GND 13, 25
BCD 1 21
BCD 2 9
BCD 4 22
BCD 8 10
BCD 10 23
BCD 20 11
BCD 40 24
BCD 80 12
RF Technology R220