Icom IC-751A Instruction Manual page 46

8,-5 MODE SCAN
1) Push VFO/M SWITCH.
2) Adjust SQUELCH CONTROL.
3) Push MODE-S SWITCH.
4) Push SCAN SWITCH.
8 - 6 PROGRAMMED SCAN
1) Store·the scan limits in memory channels 01 and
02.
NOTE: StQre both scanning limits in MEMO 01
and MEMO 02 using either the· HAM or
the .GENE mode. HAM mode limits
must be in the same band.
2) Select VFO A or B with VFO A/B SWITCH.
3) Adjust SOUELCH CONTROL.
4) Push SCAN SWITCH.
5) Scan stops when a signal opens the squelch. Scan
resumes after
10
seconds.
8 - 7 SCAN RESUMPTION
-
_ _ _ SCAN
RESUME
The purpose of this scan is to selectively monitor those memory
channels which contain frequencies programmed with the same
mode (FM, USB, LSB or CW).
1) Push the VFO/MEMORY SWITCH to select the MEMORY
CHANNEL mode.
2) Adjust the SOUELCH CONTROL to quiet the noise output
from the speaker.
3) Push IN the MODE SCAN (MODE-S) SWITCH.
4) Push the SCAN SWI TCH.
The transceiver begins from the channel selected in step 1 ), and
steps through each memory channel with the same mode,
stopping only when a receive signal is detected.
The purpose of this scanning function is to monitor a particular
section of the band.
1) Store the frequencies of the high and low limits of the desired
scanning range in memory channels 01 and 02. See SECTION
8 - 2 PROGRAMMING MEMORY CHANNELS, if necessary, for
instructions on how to write frequencies into memory channels.
The scan begins from the high limit of the range regardless of
which channel has the higher frequency stored.
2) Use the VFO A/B SWITCH to select the VFO you wish to use.
3) Adjust the SOUELCH CONTROL to quiet the noise output from
the speaker.
NOTE: If the RECEIVE INDICATOR remains ON, for example
if the SOUELCH CONTROL is rotated fully counter-
clockwise, the scan will riot stop at any signais.
4) Push the SCAN SWITCH to start the scan. The transceiver scans
from the high limit towards the low limit. The scanning rate
depends on the TUNING SPEED SWITCH position.
5) The squelch opens when a signal is received. This stops the scan
automatically if the SOUELCH CONTROL has been set as
explained in step 3). After approximately 10 seconds, the scan
resumes downwards from t:ie frequency on which it stopped.
6) Pushing the SCAN SWITCH while the scan is operating, or during
the 10 second hait period, clears the scanning function. Trans-
mitting or rotating the TUNING CONTROL also cancels the
scanning function.
After stopping due to a received signal, ail scans resume after a fixed
time of approximately 10 seconds. However, switch S10 may be
used to override this feature.
The factory setting is the SCAN RESUME position. When placed in
the SCAN CLEAR position, the scan function automatically clears
when a receive signal opens the squelch circuit. To continue scan-
ning, push the SCAN SWITCH again.
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