1-16
1
PANEL DESCRIPTION
D
ACC socket information
• ACC socket
ACC
PIN No. NAME
DESCRIPTION
SPECIFICATIONS
1 2 3 4
8
7
6
5
9 10 11 12
13
Rear panel view
Color refers to
the cable strands
of the supplied
cable.
q
brown
w
red
e
orange
r
yellow
t
green
y
blue
u
purple
i
o
!0
!1
!2
!3
gray
white
black
pink
light
blue
light
green
1
NC
(8 V*)
* If the Band Voltage modification is
performed, regulated 8 V output. (p.
12-2)
—
Output voltage
Output current
: 8 V
± 0.3
V
: Less than 10
mA
2
GND
Connects to ground.
—
3
SEND
Input/output
pin.
G r o u n d e d
when trans-
mits.
An external equipment
controls the transceiver.
When this pin goes low,
the transceiver transmits.
Input voltage (High)
Input voltage (Low)
Current flow
: 2.0 V to 20.0 V
: –0.5 V to 0.8 V
: Max. 20 mA
The transceiver outputs
a low signal to control
external equipment.
Output voltage (Low)
Current flow
: Less than 0.1 V
: Max. 200 mA
4
START Data line for the optional AT-180.
—
5
NC
(BAND*)
* If the Band Voltage modification is per-
formed, band voltage output. (p. 12-2)
—
Output voltage
: 0 to 8.0 V
6
ALC
ALC voltage input.
Control voltage
Input impedance
: –4 V to 0 V
: More than 3.3 k
˘
7
NC
—
—
8
13.8 V
13.8 V output when power is ON.
Output current
: Max. 1 A
9
KEY
Key line for the optional AT-180.
—
10
FSKK
Controls RTTY keying
“High” level
“Low” level
Output current
: More than 2.4 V
: Less than 0.6 V
: Less than 2 mA
11
MOD
Modulator input.
Input impedance
Input level
: 10 k
˘
: Approx. 100 mV rms
12
AF
AF detector output.
Fixed level, regardless of the
[AF] con-
trol
position.
Output impedance
Output level
: 4.7 k
˘
: 100–300 mV rms
13
SQLS
Squelch output.
Grounded when squelch opens.
SQL open
SQL closed
: Less than 0.3 V/5 mA
: More than 6.0 V/100 µA
• When connecting the ACC conversion cable (OPC-599)
When the SEND terminal controls the inductive load (such as a relay), a counter-electromotive force can cause the transceiver’s
malfunction or damage. To prevent this, we recommend adding a switching diode, such as an “1SS133,” on the load side of the
circuit to the counter-electromotive force absorption. When the diode is added, a switching delay of the relay may occur. Be sure
to check its switching action before operation.
Rear panel (Continued)
■
e
SEND
i
13.8V
ACC
socket
Relay
Switching diode
To a non-Icom
linear amplifier
[Example]
ACC 1
ACC 2
q
FSKK
t
AF
w
GND
y
SQLS
e
SEND
u
13.8 V
r
MOD
i
ALC
q
NC (8 V*)
t
ALC
w
GND
y
NC
e
SEND
u
13.8 V
r
NC (BAND*)
8
1
2
3
4
7
6
5
1
2
3
4
7
6
5
Connect to ACC socket
q w e r
t y u i
o !0 !1 !2
!3
* See page 12-2 for details.
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