Icom IC-25A Instruction Manual page 16

Depress the S/S (Scan Start/Stop) button, and the frequency starts scanning the programmed
frequencies in the Memory Channels 1, 2, 3,4, 5, then "A" VFO and "B" VFO, 1, 2, 3, 4, 5,
"A" VEO, "B" VEO.
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 S/S Button. Depress it again to
restart the scanning.
This function can be changed to stop when the squelch is closed, i.e., an empty channel, by
the SCAN-STOP FUNCTION SWITCHING SOCKETS located under the top cover.
PROGRAMMED SCAN
This is used to scan between two desired frequencies, which are programmed in Memory Channels
1 and 2, by setting the VFO-SCAN FUNCTION Switch located on the front panel to "PROG-S"
position.
1.
Program the frequencies of the high edge of the desired scanning range into Memory Channel
2, and the low edge into Memory Channel 1.
For example, program 145.200MHz into Memory Channel 1 and 145.800MHz into Memory
Channel 2.
Set the VFO/MEMORY CHANNEL Switch to VFO position. Depressing the S/S Button starts
the scan from the high edge (145.800MHz) to the low edge. The scanning frequency incre-
ments depend on the VFO Switch setting.
When the scanning frequency reaches the lowest edge (145.200MHz), it automatically returns
to the high edge (145.800MHz) and continues scanning down to provide endless scanning
operation.
While the SQUELCH is engaged, the squelch opening as a signal is received will stop the
scanning automatically to lock onto the frequency. If the RECEIVE indicator LED is lit
because the SOUEL CH is not engaged, the scan does not stop at any signal.
To stop the scan operation, depress the S/S Button. Depressing the S/S Button again restarts
the scan from the frequency at which it stopped.
If this frequency is changed with turning the Tuning Control knob while the scan is stopped,
the scanning will restart from the VFO frequency. |
In this case, if the VFO frequency is below the low edge frequency, the frequency jumps to
the high edge frequency (145.800MHz) and restarts from the high edge.
If the changed frequency is higher than the high edge frequency and the S/S Button is pushed,
scanning will begin at the VFO frequency, scan down to the low edge but will return to the
preprogrammed high edge frequency.
Scan restarts Scan starts
Scan starts
Turning Tuning Control Turning Tuning Control
Scan restarts
(Frequency jumps to the high edge)
Scan stops
Scan restarts
Scan stops
Turning Tuning Control
Turning
Tuning contro!
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