Yaesu FT-991A, Руководство по эксплуатации

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Page 54 FT- 991 Operating Manual
Interference Rejection
Operating Mode
SSB
CW
RTTY/DATA-LSB/
DATA-USB
AM
FM/DATA-FM
(28/50/144/430
MHz Bands)
NARROW
(
NAR
)
One-Touch IF Filter Selection
Press the F
(M-LIST)
button to display the function menu list. Touch the [ NAR/WIDE
] button to enable one-touch,
mode-specific, selection of a narrow IF DSP filter setting that does not require resetting the bandwidth control to the
WIDTH/SHIFT system.
Touching [
NAR/WIDE
] on the LCD once more returns
the bandwidth control to the WIDTH/SHIFT system.
The factory default bandwidths are:
F(M-LIST) Button

: Depends on the [
WIDTH
] setting
( ): Default Bandwidth
“ON”
200 Hz - 1.8 kHz 
(1.5 kHz)
50 - 500 Hz 
(500 Hz)
50 - 500 Hz 
(300 Hz)
6 kHz
9 kHz
“OFF”
1.8 - 3.0 kHz 
(2.4 kHz)
500 Hz - 3.0 kHz 
(2.4 kHz)
500 Hz - 3.0 kHz 
(500 Hz)
9 kHz
16 kHz
[
NAR/WIDE
]
Touch Key
Advice:

If [
NAR/WIDE
] on the LCD has been touched to
engage the narrow filter, you may further adjust the
narrow IF bandwidth by touching [
WIDTH
] on the
TFT display and rotating the MULTI knob. The IF
SHIFT may also be operated.

When in the FM mode, touching [ NAR/WIDE
] on
the TFT display will narrow both transmit and re-
ceive bandwidths.