Справочник Пользователя для ICOM ic-2720h

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PANEL DESCRIPTION

New2001

yEXTERNAL SPEAKER JACK 1 [SP-1]

Connects an 8 

Ω speaker. Outputs both left and right

bands audio when no external speaker is connected to
[SP-2]. See the table below for details.

• Audio output power is more than 2.4 W.

uEXTERNAL SPEAKER JACK 2 [SP-2]

Connects an 8 

Ω speaker. Outputs right band’s audio only. 

• Audio output power is more than 2.4 W.

iPOWER RECEPTACLE [DC13.8V]

Accepts 13.8 V DC ±15% with the supplied DC power
cable.

☞ NOTE: DO NOT use a cigarette lighter socket as a

power source when operating in a vehicle. The plug
may cause voltage drops and ignition noise may be su-
perimposed onto transmit or receive audio.

D

D Speaker information

D DATA JACK PIN ASSIGNMENT

q DATA IN

Input terminal for data transmit. See p. 62 for details on
how to toggle data speed between 1200 (AFSK) and
9600 bps (G3RUH, GMSK).

w GND

Common ground for DATA IN, DATA OUT and AF OUT.

e PTT P

PTT terminal for packet operation only. Connect ground to
transmit data.

r DATA OUT

Data out terminal for 9600 bps operation only.

t AF OUT

Data out terminal for 1200 bps operation only.

y P SQL

Becomes high (+5 V) when the transceiver receives a sig-
nal which opens the squelch.

• To avoid unnecessary TNC transmission, connect squelch to the

TNC to inhibit transmission when receiving signals.

• Keep audio output at a normal level, otherwise a “P SQL” signal

will not be output.

Front panel view

w

y

r

q

e

t

No external

Internal speaker (mixed audio)

speakers

[SP-1] only

External speaker (mixed audio)

[SP-2] only

Internal speaker

External speaker

2 external

External speaker via

External speaker via

speakers

[SP-1]

[SP-2]

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