Icom IC-756 - Manual (Page 5)

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PANEL DESCRIPTION
i 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.
- The control can be set as the RF gain control only
(squelch is fixed open) or squelch control (RF gain is
fixed at maximum) in set mode as follows. (p. 56)
- 11 to 12 o’clock position is recommended for any set-
ting of the [RF/SQL] control.
• When setting as RF gain/squelch control
o
RF POWER CONTROL [RF POWER]
Continuously varies the RF output power from min-
imum (2 W*) to maximum (100 W*).
* AM mode: 1 W to 40 W
!0 BALANCE CONTROL [BAL] (inner control; p. 30)
Adjusts the audio output balance between main and
sub readout frequencies while in dualwatch.
!1
COMPRESSION LEVEL CONTROL [COMP]
(p. 34)
Adjusts the speech compression level in SSB.
!2 NOISE REDUCTION LEVEL CONTROL [NR]
(outer control; p. 26)
Adjusts the noise reduction level when the noise re-
duction is in use. Set for maximum readability.
!3 NOISE REDUCTION SWITCH [NR] (p. 26)
Toggles the noise reduction ON and OFF. Functions
in SSB, CW and RTTY modes.
!4 NOISE BLANKER SWITCH [NB] (p. 26)
Toggles the noise blanker ON and OFF. The noise
blanker reduces pulse-type noise such as that gen-
erated by automobile ignition systems. This function
cannot be used for FM, or non-pulse-type noise.
!5
S/RF METER (p. 34)
Shows the signal strength while receiving. Shows
the relative output power, SWR or ALC levels while
transmitting.
!6
MONITOR SWITCH [MONITOR] (p. 33)
Monitors your transmitted IF signal.
- The CW sidetone functions when [MONITOR] is OFF in
CW mode.
!7 ANTENNA TUNER SWITCH [TUNER] (p. 39)
• Turns the antenna tuner ON and OFF (bypass)
when pushed momentarily.
• Starts to tune the antenna manually when pushed
for 2 sec.
- When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 20 sec.
Noise blanker OFF Noise blanker ON
NB NB
Noise reduction OFF Noise reduction ON
NR NR
BAL NR
Decreases
OFF
Increases
Compression
level decreases Compression
level increases
COMP
BAL NR
Increases main
readout gain Increases sub
readout gain
Increases Decreases
RF POWER
Recommended level
Minimum RF gain
Adjustable
range
RF gain
adjustable
range
Maximum
RF gain
Maximum
RF gain
Squelch is
open.
S-meter
squelch
S-meter squelch
threshold
Noise squelch
threshold (FM mode)
Shallow Deep
Squelch is
open.
S-meter
squelch
Noise squelch (FM mode)
Noise squelch (FM mode)
• When setting as RF gain control
(Squelch is fixed open.)
• When setting as squelch control
(RF gain is fixed at maximum.)