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VII
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
S4
.
• Push [DISPLAY] once or twice to select
S
.
• Push [MENU] one or more times to select
S4
.
w
Push [(F-1)
ANF
] 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.
Hint!
The Automatic Notch will not operate in the CW,
RTTY or SSB-D modes.
CH
VFO A
P
O
S1
5
5
3
7
9
20
40
10
60dB
USB
BLANK
S4 ANF NR NRL
ANF
ANF
DSP
Appear
[(F-1)]
[DISPLAY]
[MENU]
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
M3
.
• Push [DISPLAY] once or twice to select
M
.
• Push [MENU] one or more times to select
M3
.
w
Push [(F-2)
NB
] to activate the noise blanker.
• “NB” appears when the function is ON.
e. Adjusting the Noise Blanker:
The noise blanker
is completely variable on how much of the Noise
Blanker is used.
q
Push [
(F-2)
NB
] for 1 sec. to enter the noise blanker
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.
Hint!
When using the noise blanker, received signals
may be distorted if the noise blanker level setting
has been too high.
USB
N1 NB LEVEL
[(F-2)]
Main dial
[DISPLAY]
CH
VFO A
P
O
S1
5
5
3
7
9
20
40
10
60dB
USB
BLANK
M3 FIL NB MET
NB
[(F-2)]
[MENU]
[DISPLAY]
Appears