Icom ic-7300 Full Manual page 151

18
CONNECTOR INFORMATION
ACC socket
Connects to external equipment or a PC to control the
external unit or to control the transceiver.
• ACC socket
PIN
ACC
No.
13-pin
13
9 10 11 12
5 6 7 8
1 2 3 4
Rear panel view
q brown i gray
w red o white
e orange !0 black
r yellow !1 pink
t green !2 light
y blue blue
u purple !3 light
green
Color refers to the
cable strands of the
supplied cable.
* 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
e SEND
i 13.8 V
Relay
Switching diode
NAME
Regulated 8 V output.
1 8 V ( Used as the reference voltage for the
band voltage.)
2 GND Connects to ground.
Input/output
3 SEND* 1
pin.
4 BDT Not used.
Band voltage output.
5 BAND ( Varies with the selected amateur
band)
6 ALC ALC voltage input.
7 NC
8 13.8 V 13.8 V output when power is ON.
9 TKEY Not used.
10 FSKK Controls RTTY keying.
11 MOD Modulator input.
AF/IF Fixed AF detector or receive IF
12
(IF=12 kHz)* 2 (12 kHz) signal output.
Squelch output.
13 SQL S
Grounded when the squelch opens.
To a non-Icom
linear amplifier
DESCRIPTION
An external unit
controls the transceiver.
When this pin goes to
ground, the transceiver
transmits.
The pin goes low
when the transceiver
transmits.
—
* 2 You can change the pin 12 setting in the "ACC/USB
Output Select" item on the CONNECTORS set screen.
If the pin is set to IF, the transceiver outputs a 12 kHz IF
signal from [ACC]. In that case, you can listen to the DRM
broadcast with the application software receiver that is
installed into your PC.
* 3 You can change the input level in the "ACC MOD Level"
item on the CONNECTORS set screen. (p.12-7)
100 mV rms is at the 50% (default) setting.
* 4 You can change the output level in the "ACC/USB AF
Output Level" item on the CONNECTORS set screen.
(p. 12-7)
Approximately 200 mV rms is at the 50% (default) setting.
18-2
SPECIFICATIONS
Output voltage: 8 V ±0.3 V
Output current: Less than 10 mA
—
Input voltage (RX): 2.0 to 20.0 V
Input voltage (TX): –0.5 to +0.8 V
Current flow: Maximum 20 mA
Output voltage (TX): Less than 0.1 V
Current flow: Maximum 200 mA
—
Output voltage: 0 to 8.0 V
Input level: –4 to 0 V
Input impedance: More than 3.3 kΩ
—
Output current: Maximum 1 A
—
High level: More than 2.4 V
Low level: Less than 0.6 V
Output current: Less than 2 mA
Input impedance: 10 kΩ
Input level: 100 mV rms*
Output impedance: 4.7 kΩ
Output level: 100 ~ 300 mV rms*
SQL open: Less than 0.3 V/5 mA
SQL closed: More than 6.0 V/100 μA
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