Noise Reduction; Digital Selector - Icom IC-7850 Instruction Manual

7
FUNCTIONS FOR RECEIVE

■ Noise reduction

The Noise reduction function reduces random noise
components and enhances desired signals that are
buried in noise. The Noise reduction function uses the
DSP circuit.
Push [NR] to turn ON the Noise reduction.
q
• [NR] indicator lights.
• Pushing [NR] toggles the Noise reduction ON or OFF.
Rotate the [NR] control to adjust the Noise reduc-
w
tion level.
• Rotating the [NR] control to the right increases the re-
duction level, and rotating to the left decreases it.
• Set for maximum readability.
Too much noise reduction can result in audio signal
masking or distortion. Set the [NR] control for maxi-
mum readability.

■ Digital selector

The Digital selector control manually adjusts the cen-
ter frequency of the automatic preselector.
The automatic preselector adds selectivity ahead of
the 1st mixer. This reduces intermodulation distortion
from nearby strong signals.
The automatic preselector tracks the frequency tuning,
changing it's resonant frequency in discrete steps.
The Digital selector functions between 1.5 MHz and
29.999999 MHz.
Push [DIGI-SEL] to turn ON the Digital selector.
q
• The [DIGI-SEL] indicator lights.
• Pushing [DIGI-SEL] toggles the Digital selector ON or
OFF.
Rotate the [DIGI-SEL] control to adjust the center
w
frequency.
NOTE:
• When you rotate [MAIN DIAL] (or [SUB DIAL] dur-
ing Dualwatch or Split function) while the Digital
selector is activated, mechanical noise may be
heard due to the switching noise from internal re-
lays.
• The preamps (P.AMP 1 or P.AMP 2) cannot be
used while the Digital selector is activated.
[NR] MAIN, SUB
[NR] control MAIN, SUB
[DIGI-SEL] indicator
7-12
[NR] indicator
[DIGI-SEL]MAIN, SUB
[DIGI-SEL] control MAIN, SUB