3-3
● REAR panel (2)
[ACC]
• 8-pin
[ACC]
ACC
PIN
No.
PIN
NAME
DESCRIPTION
SPECIFICATIONS
1
2
3
4
5
6
7
8
8-pin
Rear panel
view
1
RTTY
Controls RTTY keying.
High level:
More than 2.4 V
Low level:
Less than 0.6 V
Current flow:
Maximum 2 mA
2
GND
Connects to ground.
–
3
SEND
*
1
Input/output pin.
An external unit controls
the transceiver.
When this pin goes to
ground, the transceiver
transmits.
Input voltage (RX): 2.0 ~ 20.0 V
Input voltage (TX): −0.5 ~ +0.8 V
Current flow:
Maximum 20 mA
The pin goes low
when the transceiver
transmits.
Output voltage (TX): Less than 0.1 V
Current flow:
Maximum 200 mA
4
MOD
Modulator input.
Connects to the internal modulator circuit.
Input impedance:
10 kΩ
Output level:
Approx. 100 mV rms
*
2
5
AF/IF
(IF=12 kHz)
*
3
Fixed AF detector or receive IF (12 kHz)
signal output.
Output impedance: 4.7 kΩ
Output level:
100~300 mV rms
*
4
6
SQL S
Squelch output.
This pin goes to ground when the
squelch opens (TX/RX indicator lights
green).
SQL open:
Less than 0.3 V/5 mA
SQL closed:
More than 6.0 V/100 μA
7
13.8 V
13.8 V output when power is ON.
Output current:
Maximum 1 A
8
ALC
ALC voltage input.
Input level:
−4 ~ 0 V
Input impedance:
More than 10 kΩ
*
1
When the SEND terminal controls an inductive load, such
as a relay, a counter-electromotive force can malfunction
or damage the transceiver.
To prevent this, we recommend adding a switching diode,
such as an 1SS133, on the load side of the circuit to
absorb the counter-electromotive force.
When the diode is added, a delay in relay switching may
occur.
Be sure to check its switching action before operating.
(Example) ACC socket
To a non-Icom
linear amplifier
Relay
Switching diode
e
SEND
u
13.8 V
*
2
The MOD input level is adjustable in the MENU.
100 mV rms is at 50% as the default.
MENU » SET > Connectors > ACC MOD Level
*
3
The AF/IF (IF=12 kHz) settings are selectable to output a
12 kHz IF signal in the MENU. In that case.
MENU » SET > Connectors > ACC Output Select
*
4
The AF/IF (IF=12 kHz) output level is adjustable in the
MENU.
Approximately 200 mV rms is at the 50% as the default.
MENU » SET > Connectors > ACC IF Output Level
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