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48
5
FUNCTION FOR RECEIVE
■
Noise blanker
■
AGC time constant
The
noise blanker
reduces pulse-type noise such as
that generated by automobile ignition systems. This
function is not effective for FM mode or for non pulse-
type noise. If you don’t want to use the noise blanker
for AM communications, the “
30 AM NB
” item in initial
set mode must be turned OFF (ON is the default set-
ting—p. 80).
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 toggle the noise blanker ON and
OFF.
• “NB” appears when the noise blanker is turned ON.
e
Push [
(F-2)
NB
] for 1 sec. to enter the noise blanker
level set mode (below).
r
Rotate the main dial to set the noise blanker level.
t
Push [DISPLAY] to exit the noise blanker level set
mode.
NB
CH
VFO A
S1
5
3
7
9
20
40
60dB
USB
M3 FIL
NB
MET
P
O
5
10
Appears when
the noise blanker
is turned ON.
Main dial
[DISPLAY]
[MENU]
[F-2]
The
AGC
(Automatic Gain Control) controls receiver
gain to produce a constant audio output level even
when the received signal strength is varied by fading,
etc. Use AGC slow for normal phone operation; AGC
fast for receiving data and searching for signals. AGC
time constant cannot be changed in FM mode.
q
Select
M4
.
• Push [DISPLAY] once or twice to select
M
.
• Push [MENU] one or more times to select
M4
.
w
Push [(F-3)
AGC
] to toggle the AGC time constant
between fast and slow.
• “F
AGC
” appears when the fast time constant is selected.
CH
VFO A
S1
5
3
7
9
20
40
60dB
USB
M4 VOX COM AGC
F
AGC
P
O
5
10
Appears when
AGC fast is
selected.
[DISPLAY]
[MENU]
[F-3]
N1 NB LEVEL
This item adjusts the noise blanker level. The noise
blanker level can be adjusted from 0 to 10.
The default is 5.
USB
Although noise blanker level set mode is available in all modes, the noise blanker function is not effective for FM
mode.
While
M3
is selected in all modes, push [
(F-2)
NB
] for
1 sec. to enter the noise blanker level set mode.
D
Noise blanker level set mode
5