Icom IC-R75 Instruction Manual - Page 24

5 RECEIVE FUNCTIONS ■ Optional noise reduction function optional UT-106 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 OFF Noise components Noise reduction activated Desired signal (CW) q P ush [NR] to turn the noise reduction ON. • [NR] indicator appears. w P ush [NR] for 2 sec. to enter the noise reduction level setting condition. • 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, including AM and FM modes. e R otate the tuning dial to adjust the noise reduction level. r P ush [NR] to exit the setting condition. t P ush [NR] again to turn the noise reduction OFF. • [NR] indicator disappears. ■ Optional auto notch 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 S elect SSB mode. w P ush [ANF] to turn the auto notch function ON. • [ANF] indicator appears. e P ush [ANF] again to cancel the function. • [ANF] indicator disappears. optional UT-106 Auto notch OFF Auto notch ON Desired signal (AF) Desired signal (AF) Unwanted tone frequency Particular frequency is attenuated 20