Icom IC-718 - Manual (Page 25)

23
5
RECEIVE AND TRANSMIT
ï ANF (Automatic Notch Filter) function
When an optional UT-106 is installed (DSP appears
in the function display), an auto notch function can
be used.
The function automatically attenuates more than
3 beat tones, tuning signals, etc., even if they are
moving.
The auto notch functions in SSB mode only.
q Select SSB mode.
w Push [ANF] to turn the auto notch function ON.
• [ANF] indicator appears.
e Push [ANF] again to cancel the function.
• [ANF] indicator disappears.
Unwanted tone
frequency
Desired
signal (AF) Desired
signal (AF)
Particular frequency
is attenuated
Auto notch OFF Auto notch ON
n DSP function
(Requires an optional UT-106 DSP UNIT )
When an optional UT-106 is installed (DSP appears
in the function display), noise reduction function can
be used.
The noise reduction function reduces noise
components and picks out desired signals which
are buried in noise. The received AF signals are
converted to digital signals and then the desired
signals are separated from the noise.
q Push [NR] to turn the noise reduction ON.
• [NR] indicator appears.
w Push [NR] for 1 sec. to enter the noise reduction
level setting condition.
e Rotate the tuning dial to adjust the noise
reduction level.
r Push [NR] to exit the setting condition.
t Push [NR] again to turn the noise reduction OFF.
• [NR] indicator disappears.
• Noise reduction example
Higher setting of the [NR] level results in audio
signal masking or distortion. Set the [NR] level for
maximum clarity. The noise reduction function is
available in all modes.
Noise reduction OFF Noise reduction activated
Desired
signal (CW) Noise components
ï NR (Noise reduction) function