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
