Icom IC-718 Instruction Manual - Page 25

DSP function - filter installation

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5 RECEIVE AND TRANSMIT s DSP function (Requires an optional UT-106 DSP UNIT) ï NR (Noise reduction) function 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. • Noise reduction example Noise reduction OFF Noise components Noise reduction activated Desired signal (CW) q Push [NR] to turn the noise reduction ON. • [NR] indicator appears. 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. 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. 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. Auto notch OFF Auto notch ON The function automatically attenuates more than 3 beat tones, tuning signals, etc., even if they are moving. Desired signal (AF) Desired signal (AF) 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 Particular frequency is attenuated 23

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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 mov-
ing.
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
■
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 compo-
nents 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 sepa-
rated 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 sig-
nal 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