Kenwood TS-870S Instruction Manual page 13

Intelligent digital enhanced communications system
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Pin No. Pin Name
NC
1
Not connected
NC
Not connected
2
Audio output from receiver
ANO
3
• Connect to TNC or MCP receive data pin for digital operation.
• Audio level is independent of AF gain control setting.
• Audio level can be changed via Menu No. 21 (PKT.OUT) {page 25}.
• Output impedance: 4.7 k
Shield for Pin 3
GND
4
Squelch control
PSQ
5
• Connect to TNC or MCP squelch control pin for digital operation.
• Prevents the TNC from transmitting while the receiver squelch is open.
• Squelch open: Low impedance
6
S-meter output
SMET
Not connected
7
NC
Chassis ground
8
GND
Transceiver PTT line control
9
PKS
• Connect to TNC or MCP transmit/receive switching pin for digital operation.
• Microphone audio input is muted when the transceiver is switched to transmit.
10
NC
Not connected
11
Microphone audio input
PKD
• Connect to TNC or MCP transmit data pin for digital operation.
GND
Shield for Pin 11
12
SS
PTT control (in parallel with MIC jack) for connecting a footswitch or other external controller
13
Personal computer/
dumb terminal
TNC/MCP
power
supply
TNC/MCP
Function
• Squelch closed: High impedance
TS-870S
13
9
10
5
6
1
2
ACC 2 Connector
(Rear Panel view)
2 INSTALLATION
Black
Red
PS-52
11
12
7
8
3
4
7

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