Yaesu FT-2000D, Руководство по эксплуатации

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Page 61 FT-2000D O
PERATING
M
ANUAL
IF N
OISE
B
LANKER
(
NB
)
O
PERATION
The FT-2000D includes an effective IF Noise Blanker, which can significantly reduce noise caused by automotive ignition
systems.
Main band
(
VFO-A
)
NB Operation
1. Press the [
NB
] button momentarily to reduce short-
duration pulse noise such as from switching transients,
automobile ignitions and power lines. The “
” icon
will appear in the display to confirm that the Narrow-
NB is operating. Press and hold in the [
NB
] button for
two seconds to reduce longer-duration man-made pulse
noise. The “
” icon will blink for five seconds, and
thereafter will appear continuously, to confirm that the
Wide-NB is operating.
2. Advance the [
NB
] knob to the point where the offend-
ing noise is best reduced or eliminated.
3. To end Noise Blanker operation, press the [ NB
] but-
ton once more. The “ ” icon will turn off, confirm-
ing that the Noise Blanker is no longer in operation.
A
DVICE
:
When you change the Noise Blanker level on the Main
(VFO-A) side, the Sub (VFO-B) band’s Noise Blanker
level will automatically change to be the same as that for
VFO-A, if the Sub (VFO-B) band’s Noise Blanker is en-
gaged.
Main Band (VFO-A) “ NB ” Icon
[B] Button
Sub Band (VFO-B) “ NB ” Icon
[NB] Button
I
NTERFERENCE
R
EJECTION
(
S
IGNALS WITHIN
3
KHZ
)
[NB] Knob
Sub band
(
VFO-B
)
NB Operation
1. Press the [ B
] button.
2. Within five seconds of pressing the [ B
] button (while
the imbedded orange LED is blinking), press the [ NB
]
button momentarily to reduce short-duration pulse
noise such as from switching transients, automobile ig-
nitions and power lines. The “
” icon will appear in
the display to confirm that the Narrow-NB is operat-
ing.
3. Within five seconds of pressing the [
B
] button (while
the imbedded orange LED is blinking), press and hold
in the [
NB
] button for two seconds to reduce longer-
duration man-made pulse noise. The “ ” icon will
blink for five seconds, then appear continuously, to con-
firm that the Wide-NB is operating.
4. To end Noise Blanker operation, press the [
B
] button,
then press the [ NB
] button. The “
” icon will turn
off, confirming that the Noise Blanker is no longer in
operation.
A
DVICE
:
When you change the Noise Blanker level on the Sub
(VFO-B) side, the Main (VFO-A) band’s Noise Blanker
level will automatically change to be the same as that for
VFO-B, if the Main (VFO-A) band’s Noise Blanker is
engaged.