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Front panel
q
POWER SWITCH [POWER/TIMER]
➥
Push momentarily to turn power ON.
• Turn the optional DC power supply ON in advance.
• A/D converter calibration of the DSP unit starts and it
takes approx. 10 sec.
➥
Push momentarily to toggle the timer function ON
and OFF. (p. 63)
• The power switch lights while the timer function is ON.
➥
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. 43)
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. 43)
• A straight key jack is separately available on the rear
panel. See [KEY] on p. 12.
• Keyer polarity (dot and dash) can be reversed in keyer
set mode. (p. 43)
• 4-channel memory keyer is available for your conve-
nience. (p. 44)
t
MICROPHONE CONNECTOR [MIC]
Accepts the supplied or optional microphone.
• See p. 84 for appropriate microphones.
• See p. 9 for microphone connector information.
y
AF CONTROL [AF]
(inner control)
Varies the audio output level from the speaker.
u
MIC GAIN CONTROL [MIC GAIN]
Adjusts microphone input gain.
• The transmit audio tone in SSB mode can be adjusted in
set mode. (p. 65)
✔
How to set the microphone gain.
Set the [MIC] control so that the ALC meter sometimes
swings during normal voice transmission in SSB mode.
MIC GAIN
Recommended level for
an Icom microphone
Increases
Decreases
AF
RF/SQL
No audio output
Max. audio output
Decreases
Increases
(dot)
(com)
(dash)
2
2
PANEL DESCRIPTION
TIMER
POWER
TRANSMIT
PHONES
ELEC-KEY
MIC
TUNER MONITOR
NB
NR
AF
BAL
NR
RF/SQL
MIC GAIN RF POWER
COMP BK-IN DELAY KEY SPEED
F-1
F-2
F-3
F-4
F-5
HF/50MHz TRANSCEIVER
i756PRO™
SSB
CW/RTTY
AM/FM
FILTER
EXIT/SET
q
w
e
r
t
!2
!3
!4
!5
!6
y
i
!1
o !0
u
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