Noise Reduction - Icom IC-9700 Basic Manual

4
RECEIVING AND TRANSMITTING

Noise Reduction

SSB, CW, RTTY, AM, FM and DV modes
The Noise Reduction function reduces random noise
components and enhances signal audio.
Push to turn the Noise Reduction function ON or
NR
OFF.
D Adjusting the Noise Reduction level
Adjust the Noise Reduction level to where noise is
reduced but the received signal is not distorted.
1. Hold down for 1 second.
NR
• Turns ON the Noise Reduction function and opens the
NR menu.
2. Rotate to adjust the Noise Reduction
MULTI
level to between 0 and 15.
L Adjust to a higher level to increase the reduction
level, and a lower level to decrease it.
3. To close the NR menu, push
Noise Reduction OFF
NR level 0
Noise components
Displayed
when the Noise
Reduction
function is ON
Rotate
Push
.
EXIT
Noise Reduction ON
NR level 4
Desired signal (CW)
4-6
Notch Filter
SSB, CW, RTTY, AM and FM modes
The IC-9700 has Auto Notch and Manual Notch
functions.
Auto Notch automatically attenuates beat tones,
tuning signals and so on. It can be used in the SSB,
AM and FM modes.
Manual Notch attenuates beat tones, tuning signals
and so on by manually adjusting the filtering
frequency. It can be used in the SSB, CW, RTTY and
AM modes.
D Selecting the Notch filter type
Push several times to select "AN (Auto Notch)"
NOTCH
or "MN (Manual Notch)."
L Pushing changes between "AN (Auto Notch),"
NOTCH
"MN (Manual Notch)" and OFF.
D Setting the Manual Notch filter
When Manual Notch is selected, adjust the filtered
frequency.
1. Hold down
NOTCH
NOTCH menu.
• Opens the Notch menu.
• The Manual Notch is automatically selected and "MN"
is displayed.
2. Touch [WIDTH] several times to select the Manual
Notch filter width from "WIDE," "MID" and "NAR."
3. Rotate slowly, to manually attenuate the
MULTI
frequency.
4. To close the NOTCH menu, push
NOTE: While adjusting, noise may be heard.
This comes from the FPGA and does not indicate an
equipment malfunction.
Displayed when
a notch filter is
selected
for 1 second to display the
.
EXIT