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Page 46 FT-950 OPERATING MANUAL
IF NOISE BLANKER
(
NB
)
OPERATION
The FT-950 includes an effective IF Noise Blanker, which can significantly reduce noise caused by automotive ignition
systems.
INTERFERENCE REJECTION
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 three seconds,
and thereafter will appear continuously, to confirm that
the Wide-NB is operating.
2. If desired, you may adjust the Noise Blanker level via
Menu item “067 RGEN NB 1 LVL” (for short-dura-
tion pulse noise) or “068 RGEN NB 2 LVL” (for longer
duration pulse noise) to the point where the offending
noise is best reduced or eliminated. See box below for
details.
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.
ADVICE:
The Noise Blanker operation will be memorized indepen-
dently on each VFO stack of VFO-A and VFO-B. How-
ever, the Noise Blanker level is in common.
[
NB
]
Button
Adjusting the Noise Blanker Level
1. Press the
[
MENU
]
button to engage the Menu
mode.
2. Rotate the
[
SELECT
]
knob to select Menu item
067 RGEN NB 1 LVL” (for short-duration pulse
noise) or “068 RGEN NB 2 LVL” (for longer-du-
ration pulse noise).
ADVICE:
Press the
[
SELECT
]
knob to toggle the display
between “Menu Number & Menu Group Name”
and “Menu Item”.
3. Rotate the
[
CLAR/VFO-B
]
knob to the point where
the offending noise is best reduced or eliminated.
4. Press and hold in the
[
MENU
]
button for one sec-
ond to lock in the new setting and exit to normal
operation.
[
CLAR/VFO-B
]
Knob
[
MENU
]
Button
[
SELECT
]
Knob
48


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