Icom IC-703 Instruction Manual page 12

QUICK REFERENCE GUIDE
c. Automatic Notch: The automatic notch will track
up to heterodynes. This is helpful for eliminating
annoying transmitter "tune up" tones on any band,
and to minimize continuous tone "heterodynes" en-
countered on the 40 meter phone bands at night,
for example. Once selected an icon will appear
"ANF" on the display.
q Select
.
• Push [DISPLAY] once or twice to select .
• Push [MENU] one or more times to select
w Push [(F-1)
] to activate the automatic notch fil-
ter.
NOTE: Your IC-703 is equipped with an AGC cir-
cuit. This allows the DSP to filter out interfering sig-
nals and QRM, while also taking this interference
out of the AGC. Bottom line, this will either elimi-
nate or greatly reduce the pumping of the AGC
from the interfering signal.
d. Noise Blanker: The noise blanker function re-
duces pulse-type noise such as that generated by
automobile ignition systems. This function is not ef-
fective for FM modes or for non pulse-type noise.
q Select
.
• Push [DISPLAY] once or twice to select .
• Push [MENU] one or more times to select
w Push [(F-2)
] to activate the noise blanker.
• "NB" appears when the function is ON.
[MENU]
USB
Appears
NB
S1 3 5
P
O
VII
.
.
[(F-2)] [DISPLAY]
BLANK
VFO A
7 9 20 40 60dB
CH
5 10
[(F-1)]
[MENU]
USB
DSP
Appear
ANF ANF
S1 3 5 7 9 20
P 5
O
Hint!
The Automatic Notch will not operate in the CW,
RTTY or SSB-D modes.
e. Adjusting the Noise Blanker: The noise blanker
is completely variable on how much of the Noise
Blanker is used.
q Push [
] for 1 sec. to enter the noise blanker
(F-2)
level set mode.
w Rotate the main dial to set the noise blanker level.
e Push [DISPLAY] to exit the noise blanker level set
mode.
[(F-2)]
USB
Hint!
When using the noise blanker, received signals
may be distorted if the noise blanker level setting
has been too high.
[DISPLAY]
BLANK
40 60dB VFO A
CH
10
[DISPLAY]
Main dial