Manual Icom IC-7300 (page 151 of 173) (English)

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CONNECTOR INFORMATION

18-2

ACC socket

Connects to external equipment or a PC to control the

external unit or to control the transceiver.

• ACC socket

ACC

No.

NAME DESCRIPTION SPECIFICATIONS

1 8 V

Regulated 8 V output.

( Used as the reference voltage for the

band voltage.)

Output voltage:

Output current:

8 V ±0.3 V

Less than 10 mA

2 GND Connects to ground. —

3 SEND*

Input/output

pin.

An external unit

controls the transceiver.

When this pin goes to

ground, the transceiver

transmits.

Input voltage (RX):

Input voltage (TX):

Current ow:

2.0 to 20.0 V

–0.5 to +0.8 V

Maximum 20 mA

The pin goes low

when the transceiver

transmits.

Output voltage (TX):

Current ow:

Less than 0.1 V

Maximum 200 mA

4 BDT Not used. —

5 BAND

Band voltage output.

( Varies with the selected amateur

band)

Output voltage: 0 to 8.0 V

6 ALC ALC voltage input.

Input level:

Input impedance:

–4 to 0 V

More than 3.3 kΩ

7 NC — —

8 13.8 V 13.8 V output when power is ON. Output current: Maximum 1 A

9 TKEY Not used. —

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 kΩ

100 mV rms

AF/IF

(IF=12 kHz)*

Fixed AF detector or receive IF

(12 kHz) signal output.

Output impedance:

Output level:

4.7 kΩ

100 ~ 300 mV rms

13 SQL S

Squelch output.

Grounded when the squelch opens.

SQL open:

SQL closed:

Less than 0.3 V/5 mA

More than 6.0 V/100 μA

1 2 3 4

8765

10 11 12

13-pin

Rear panel view

q brown

w red

e orange

r yellow

t green

y blue

u purple

i gray

o white

!0 black

!1 pink

!2 light

blue

!3 light

green

Color refers to the

cable strands of the

supplied cable.

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.

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.

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.

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 amplier

Relay

Switching diode

e SEND

i 13.8 V

is there available a wiring pictorial chart for the small internal ic-7300 coaxial jumper cables?
ie: from the RF unit to the PA board? tnx Sam in Alabam KF4TXQ Submitted on 2-1-2022 at 06:09
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Icom IC-7300 Manual

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