Icom IC-2720H [23/96] Panel description

Icom IC-2720H [23/96] Panel description
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PANEL DESCRIPTION
New2001
1
yEXTERNAL SPEAKER JACK 1 [SP-1]
Connects an 8 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 speaker. Outputs right bands 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.
DD
Speaker information
D DATA JACK PIN ASSIGNMENT
qDATA 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).
wGND
Common ground for DATA IN, DATA OUT and AF OUT.
ePTT P
PTT terminal for packet operation only. Connect ground to
transmit data.
rDATA OUT
Data out terminal for 9600 bps operation only.
tAF OUT
Data out terminal for 1200 bps operation only.
yP 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
Connected
Left band audio Right band audio
speaker
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]
IC-2720H_2.qxd 03.5.13 9:45 Page 6 (1,1)

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