Notch Function; Auto Notch Function; Manual Notch Function - Icom IC-7851 Instruction Manual

■ Notch function

The IC-7851 has Auto and Manual notch functions.
• Auto notch: Used in the SSB, AM, or FM mode
• Manual notch: Used in the SSB, CW, RTTY, PSK, or
AM mode
D Auto notch function
The Auto notch function uses DSP to automatically at-
tenuates beat tones, tuning signals, and so on, even if
they are moving.
➥
Push [NOTCH] several times to select "AN."
• Pushing [NOTCH] toggles the Notch function "AN" (Auto
notch), "MN" (Manual notch), and OFF.
•
" " is displayed when Auto notch is in use.
AN
D Manual notch function
The Manual notch can be set to attenuate a frequency
by rotating the [NOTCH] control.
q
Push [NOTCH] several times to select "MN."
• Pushing [NOTCH] toggles the Notch function "AN" (Auto
notch), "MN" (Manual notch), and OFF.
•
" " is displayed when manual notch is in use.
MN
• Hold down [NOTCH] for 1 second to toggle the manual
notch filter width between "WIDE," "MID," and "NAR." Af-
ter selecting, the filter width value is displayed for about
1 second.
w
Rotate the [NOTCH] control to manually attenuate
a frequency.
While tuning the manual notch, noise may be heard.
This comes from the DSP unit and does not indi-
cate an equipment malfunction.
FUNCTIONS FOR RECEIVE
[NOTCH] indicator
• The Auto notch indication
• The Manual notch indication
• When selecting the manual notch filter width
7-13
[NOTCH] control MAIN, SUB
[NOTCH] MAIN, SUB
7