ICOM ic-756pro 取り扱いマニュアル

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5

RECEIVE AND TRANSMIT

■

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.

Unwanted tone 
frequency

Desired 
signal (AF)

Desired 
signal (AF)

Particular frequency
is attenuated

Auto notch OFF

Auto notch ON

■

The noise blanker eliminates pulse-type noise such
as from car ignitions. The noise blanker is not avail-
able for FM mode.

➥

Push the [NB] switch to turn the noise blanker ON
or OFF.

When using the noise blanker, received signals

may be distorted if they are excessively strong.

Noise blanker OFF

Noise blanker ON

[NB] switch

■

The noise reduction function reduces noise compo-
nents and picks out desired signals which are buried
in noise. The received signals are converted to digital
signals and then the desired signals are separated
from the noise.

q

Push the [NR] switch to turn the noise reduction
ON.

• [NR] indicator lights.

w

Rotate the [NR] control to adjust the noise reduc-
tion level.

e

Push the [NR] switch to turn the noise reduction
OFF.

• [NR] indicator does not light.

Deep rotation of the [NR] control results in audio
signal masking or distortion. Set the [NR] control
for maximum readability.

Noise reduction OFF

Noise reduction activated

Desired 
signal (CW)

Noise components