Icom IC-9700 - Noise Reduction

4
RECEIVING AND TRANSMITTING
4-6
Noise Reduction
SSB, CW, RTTY, AM, FM and DV modes
The Noise Reduction function reduces random noise
components and enhances signal audio.
Push
NR
to turn the Noise Reduction function ON or
OFF.
Displayed
when the Noise
Reduction
function is ON
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
NR
for 1 second.
• Turns ON the Noise Reduction function and opens the
NR menu.
2. Rotate
MULTI
to adjust the Noise Reduction
level to between 0 and 15.
L Adjust to a higher level to increase the reduction
level, and a lower level to decrease it.
Rotate
Push
Noise Reduction OFF
NR level 0
Noise Reduction ON
NR level 4
Noise components Desired signal (CW)
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 ltering
frequency. It can be used in the SSB, CW, RTTY and
AM modes.
D Selecting the Notch lter type
Push
NOTCH
several times to select “AN (Auto Notch)”
or “MN (Manual Notch).”
L Pushing
NOTCH
changes between “AN (Auto Notch),”
“MN (Manual Notch)” and OFF.
Displayed when
a notch lter is
selected
D Setting the Manual Notch lter
When Manual Notch is selected, adjust the ltered
frequency.
1. Hold down
NOTCH
for 1 second to display the
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.”
NOTE: While adjusting, noise may be heard.
This comes from the FPGA and does not indicate an
equipment malfunction.
3. Rotate
MULTI
slowly, to manually attenuate the
frequency.
4. To close the NOTCH menu, push
EXIT
.
3. To close the NR menu, push
EXIT
.