Noise Blanker; Notch Function - Icom IC-756PROIII Instruction Manual

■ Noise blanker

The noise blanker eliminates pulse-type noise such
as from car ignitions. The noise blanker is not avail-
able for FM mode.
[NB] [(F-3)DEF]
AGC AGC
NB L eve l NB L eve l
MID MID
VOX VOX
ON ON
COMP COMP
OFF OFF
WIDE WIDE

■ Notch function

This transceiver has auto and manual notch func-
tions. The auto notch function automatically attenu-
ates more than 3 beat tones, tuning signals, etc.,
even if they are moving. The manual notch can be set
to attenuate a frequency via the [NOTCH] control.
➥ Push [NOTCH] to toggle the notch function be-
tween auto, manual and OFF in SSB and AM
modes.
➥ Push [NOTCH] to turn the manual notch function
ON and OFF in CW mode.
➥ Push [NOTCH] to turn the auto notch function ON
and OFF in FM mode.
• Set to attenuate a frequency for manual notch via the
[NOTCH] control.
• "AN" appears when auto notch is in use.
• "MN" appears when manual notch is in use.
While operating the manual notch, noise may be
heard. This comes from the DSP unit and does not
indicate an equipment malfunction.
Tuning dial
NB NB
5 0 % 5 0 %
DEF DEF
FUNCTION FOR RECEIVE
q Push [NB] to turn the noise blanker ON.
• [NB] indicator lights.
w Push [NB] for 1 sec. to enter the noise blanker
level set mode.
e Rotate the tuning dial to adjust the noise blanker
level.
• Push [(F-3)DEF] for 1 sec. to return to default value.
r Push [NB] to turn the noise blanker OFF.
• [NB] indicator goes off.
When using the noise blanker, received signals
may be distorted if they are excessively strong.
[NOTCH](switch)
Auto notch OFF
Desired
signal (AF)
Unwanted tone
frequency
5
[NOTCH](control)
Auto notch ON
Desired
signal (AF)
Particular frequency
is attenuated
5
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