
13 CONNECTING PERIPHERAL EQUIPMENT
69
TERMINAL DESCRIPTIONS
COM CONNECTOR
Pin No.
Pin Name
Function
I/O
1
NC
No connection
—
2
RXD
Transmit data
O
3
TXD
Receive data
I
4
NC
No connection
—
5
GND
Ground
—
6
NC
No connection
—
7
RTS
Receive enable
I
8
CTS
Transmit enable
O
9
NC
No connection
—
ACC2 CONNECTOR
Pin No.
Pin Name
Function
I/O
1
NC
No connection
—
2
RTTY
RTTY key input
I
3
ANO
Audio output from the transceiver
• Connect to the audio input of the TNC, MCP, or PC (or PC
interface connection).
• Audio output level is independent from the
AF
control setting.
• Audio output level can be changed by adjusting the value in
Menu No. 74. Set the value to a moderate audio output level.
The default value of 4 is approximately 0.5 V
p-p
, which is a
standard modulating signal. The settings of 0 ~ 9 vary from
approximately 0 V
p-p
to 1.2 V
p-p
.
• Impedance: Approx. 10 k
.
O
4
GND
Ground
—
5
PSQ
Transceiver squelch control
• Connect to the squelch input of the TNC, MCP, or PC
connection interface.
• Squelch open: Low impedance
• Squelch closed: High impedance
O
6
NC
No connection
—
7
NC
No connection
—
8
GND
Ground
—
9
PKS
PTT input for data communication
• Connect to the PTT output of the TNC, MCP, or PC connection
interface.
• Microphone audio input mutes when transmitting.
I
10
NC
No connection
—
11
ANI
Audio input for data communication
• Connect to the audio output of the TNC, MCP, or PC (or PC
interface connection).
• Audio input level is independent from the microphone gain (set
with the
[MIC]
key).
• Audio input level can be changed by adjusting the value in Menu
No. 73. The default value of 4 is approximately 10 mVrms, which
is a standard modulating signal. The settings of 0 ~ 9 vary from
approximately no modulation to approximately 1 mVrms.
• Impedance: Approx. 10 k
.
I
12
GND
Ground
—
13
SS
PTT input (same as the front panel MIC connector)
• During transmission, the audio input of ACC2 connector
terminal 11 (ANI) and the USB terminal are muted.
I