Dsp Function; Dsp Unit - Icom ic-718 Instruction Manual

 DSP function
ï NR (Noise Reduction) function
When an optional UT-106 is installed, the Noise Re-
duction function can be used. Also, DSP appears in
the Function display.
The Noise Reduction function reduces noise compo-
nents and picks out desired signals that are buried in
noise. The received AF signals are converted to digi-
tal signals and then the desired signals are separated
from the noise.
q Push [NR] to turn the noise reduction ON.
• "NR" appears.
w Hold down [NR] for 1 second to enter the Noise
Reduction level Set mode.
e Rotate [DIAL] to adjust the Noise Reduction level.
r Push [NR] to exit the Set mode.
t Push [NR] again to turn the function OFF.
• "NR" disappears.
ï ANF (Automatic Notch Filter) function
When an optional UT-106 is installed, the auto notch
function can be used. Also, DSP appears in the Func-
tion display.
The function automatically attenuates more than 3
beat tones, tuning signals and so on, even if they are
moving.
The auto notch functions in only the SSB mode.
q Select the SSB mode.
w Push [ANF] to turn ON the Auto Notch function.
• "ANF" appears.
e Push [ANF] again to turn OFF the function.
• "ANF" disappears.
(Requires an optional UT-106
RECEIVE AND TRANSMIT
)

DSP UNIT

• Noise Reduction example
Noise Reduction OFF
Noise components
Higher setting of the [NR] level results in audio sig-
nal masking or distortion. Set the [NR] level for
maximum clarity. The Noise Reduction function is
usable in all modes.
Auto notch OFF
Desired
signal (AF)
Unwanted tone
frequency
5
Noise Reduction activated
Desired
signal (CW)
Auto notch ON
Desired
signal (AF)
Particular frequency
is attenuated
23