Icom IC-251A Instruction Manual page 23

The programmed frequencies in the three Memory Channels are maintained as long as the power,
including MEMORY power, of the IC-251A/E is not turned OFF or new frequencies reprogrammed.
When the MEMORY Switch on the rear panel is set to ON (up), all the programmed frequencies
on the Memory Channels and the operating frequencies of both "A" and "B'"' VFOQ's are retained
even when the POWER Switch is turned OFF.
SCANNING OPERATION
The IC-251A/E provides various scanning operations. Read the following instructions carefully to
fully enjoy the IC-251A/E's many capabilities.
MEMORY SCAN
This is to scan the three Memory Channels continuously.
1. Program three desired frequencies in Memory Channels 1, [2], and {3).
2. Set the VFO/MEMORY Switch to the "MS" position. At this time, the operating or displayed
frequency is not changed.
3. Depress the MS/MW Switch, and the display frequency starts scanning the programmed
frequencies in the Memory Channels 1, [2], (3), 1, 2, GL...
4. If the SQUELCH is engaged, the scan stops when the squelch is opened and receives a signal.
To stop scanning without opening the squelch, depress the MS/MW Button. Depress it again
to restart the scanning.
PROGRAMMED SCAN "A"
This is to scan between two desired frequencies, which are programmed in Memory Channels
[2] and (3). ;
1. Program the frequencies of the high and low edge of the desired scanning range in Memory
Channels [2] and [3]. Regardless of which channel the higher frequency is programmed in, the
scan starts from the high edge of the range.
For example, program 145.2MHz in Memory Channel [2] and 145.8MHz in Memory Channel
(3).
2. Set the VFO Switch to "A". Depressing the MS/MW Button starts the scan from the high
edge (145.8MHz) to the low edge. The scanning frequency increments depend on the MODE
Switch setting and the TS Button setting.
3. When the scanning frequency reaches the low edge (145.2MHz), it automatically returns to
the high edge (145.8MHz) and continues scanning down to provide endless scanning operation.
4. While the SQUELCH is engaged, the squelch opening when a signal is received will stop the
scanning automatically to lock onto the frequency. Depressing the MS/MW Button will
restart the scan from the frequency at which it stopped. If the RECEIVE indieator LED is
lit because the SQUELCH is not engaged, the scan does not stop at any signals.
5. To stop the scan operation, depress the MS/MW Button. Depressing the MS/MW Button
again restarts the scan from the high edge (145.8MHz) of the programmed range.
PROGRAMMED SCAN A
145.2MHz : 145.8MHz
Memory Channel[2] Signal Memory Channel [3]
MS/MW Pushed
=e
Rm ee ee mm em ee ee em mm et ee ae ee ae ee ee
Manual Return to the high edge
stop ;
TS See See coe Se ce bee Sek ~
~~ ~
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