Yaesu FT-991A, Руководство по эксплуатации

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Page 113 FT- 991 Operating Manual
VFO Scanning
Either the VFO or the memory channels of the FT-991A may be scanned, and the receiver will halt scanning on any
frequency with a signal strong enough to open the receiver squelch.
1. Set the VFO-A to the frequency on which you would
like to begin scanning.
2. Press the F
(M-LIST)
button, then touch [ SQL
] on
the LCD. Rotate the MULTI knob so that the back-
ground noise is just silenced.
F(M-LIST) Button
MULTI Knob
3. Press and hold in the microphone UP or DWN but-
ton for one second, or press the F
(M-LIST)
button
followed by [ SCAN
] to start scanning in the speci-
fied direction on the VFO frequency.
4. If the scanner halts on an incoming signal, the deci-
mal point between the “MHz” and “kHz” digits of
the frequency display will blink.
Advice:

If the incoming signal disappears, scanning will
resume in about five seconds.

On the SSB/CW and SSB-based Data modes, the
scanner will pause on a received signal, then will
step across the signal very slowly, giving you
time to stop the scan, if you like. In these modes
on the VFO, the scanner does not stop, however.
5. To cancel scanning, press the
PTT
switch, or touch
[
SCAN
] on the LCD.
Advice:

If the scan has paused on a signal, pressing the mi-
crophone UP or DWN button, or touching [ SCAN
]
on the LCD will cause scanning to resume instantly.

If you press the microphone PTT button during
scanning, the scanner will halt at once. However,
pressing the PTT button during scanning will not
cause transmission.

The manner in which the scanner resumes after it has
paused on a signal may be selected by using Menu
item “
038 MIC SCAN RESUME
”. The default “
TIME
”
(5 sec) setting will cause the scanner to resume scan-
ning after five seconds; however the scan setting
may be changed to resume only after the received
signal has dropped out.

If the Main Tuning Dial knob is rotated while scan-
ning is in progress, the scanning will continue up
or down in frequency according to the direction of
the Dial Knob rotation. (in other words, if the dial
is rotated to the left when scanning toward a higher
frequency, the direction of the scan will reverse.)
Quick Point:
If you have no interest in scanning, and wish to prohibit
the microphone UP / DWN buttons from initiating scan-
ning, you may disable scanning control from the mi-
crophone using Menu item “
037 MIC SCAN
” (set it to
“
DISABLE
”).
VFO and Memory Scanning