1
1
PANEL DESCRIPTION
2001 NEW
■ Front panel
q POWER SWITCH [POWER]
➥ Push momentarily to turn power ON.
• Turn the optional DC power supply ON in advance.
➥ Push for 1 sec. to turn power OFF.
w TRANSMIT SWITCH [TRANSMIT]
Selects transmitting or receiving.
•The [TX] indicator lights red while transmitting and the
[RX] indicator lights green when the squelch is open.
e HEADPHONE JACK [PHONES]
Accepts headphones.
• Output power: 5 mW with an 8 Ω load.
•When headphones are connected, the internal speaker
or connected external speaker does not function.
r ELECTRONIC KEYER JACK [ELEC-KEY] (p. 14)
Accepts a paddle to activate the internal electronic
keyer for CW operation.
•Selection between the internal electronic keyer, bug-key
and straight key operation can be made in keyer set
mode. (p. 34)
•A straight key jack is separately available on the rear
panel. See [KEY] on p. 7.
•Keyer polarity (dot and dash) can be reversed in keyer
set mode. (p. 34)
•4-channel memory keyer is available for your conve-
nience. (p. 30)
t MICROPHONE CONNECTOR [MIC]
Accepts the supplied or an optional microphone.
• See p. 101 for appropriate microphones.
• See p. 12 for microphone connector information.
y RF GAIN CONTROL/SQUELCH CONTROL
[RF/SQL] (outer control)
Adjusts the RF gain and squelch threshold level.
The squelch removes noise output from the speaker
(closed condition) when no signal is received.
•The squelch is particularly effective for FM. It is also
available for other modes.
•12 to 1 o’clock position is recommended for any setting
of the [RF/SQL] control.
•The control can be set as ‘Auto’ (RF gain control in SSB,
CW and RTTY; squelch control in AM and FM) or
squelch control (RF gain is fixed at maximum) in set
mode as follows. (p. 81)
• When setting as RF gain/squelch control
Recommended level
RF gain
adjustable
range
Maximum
RF gain
S-meter
squelch
Noise squelch (FM mode)
Squelch is
open.
MODE
SSB, CW
RTTY
AM, FM
AUTO
RF GAIN
SQL
SQL
SET MODE SETTING
SQL
SQL
RF GAIN + SQL
RF GAIN + SQL
RF GAIN + SQL
POWER
TRANSMIT
PHONES
ELEC-KEY
MIC
NR
A
/NOTCH
TUNER
ANT
HF/VHF TRANSCEIVER
NR
NOTCH
AF
MIC GAIN
RF PWR
CW PITCH
F 1
F
2F
3
F
4
F
5
XFC
MP
-
W
GENE
50
0
21
7
24
8
28
9
14
5
10
4
18
6
3.5
2
1. 8
1
7
3
144
ENT
MP
-
R
TX
RX
LOCK
TS
SPLIT
F-INP
A/B
KEY SPEED
P.AMP/ATT
NB
VOX/BK-IN
MONITOR
CALL
LOCK/
SPCH
RF/SQL
i7400
MENU
SSB
CW/RTTY
AM/FM
FILTER
q
w
e
r
t
yuio !0 !1
!4!5!6!7 !3 !2
IC-7400.qxd 02.4.2 11:35 Page 1
To Next Page
Loading...
Need help?
General
