Icom IC-751A - Mode Scan; Programmed Scan; Scan Resumption

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
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 SQUELCH
CONTROL
to quiet
the
noise output
from the speaker.
3)
Push
IN
the
MODE
SCAN (MODE-S)
SWITCH.
4)
Push the
SCAN SWITCH.
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 scan limits in memory channels
01
and
1)
Store the frequencies of the high
and low
limits of the desired
02.
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)
Select VFO Aor
B
with VFO A/B
SWITCH.
2)
Use the
VFO
A/B
SWITCH to select
the
VFO
you wish
to
use.
NOTE:
Store
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.
3)
Adjust
SQUELCH CONTROL. 3)
Adjust
the
SQUELCH CONTROL
to
quiet
the noise output from
the
speaker.
NOTE:
If
the
RECEIVE INDICATOR remains
ON, for example
if the
SQUELCH CONTROL
is
rotated
fully
counter-
clockwise, the scan will not stop at
any signals.
4)
Push
SCAN
SWITCH.
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)
Scan stops
when
a
signal
opens
the squelch. Scan
5)
The squelch opens
when
a
signal is received. This stops
the scan
resumes after 1
0
seconds.
automatically if the SQUELCH
CONTROL has been set as
explained in step 3).
After approximately 10
seconds, the
scan
resumes
downwards from the
frequency on which it stopped.
6)
Pushing the SCAN
SWITCH while the
scan
is
operating,
or during
the 10
second halt period,
clears the scanning
function. Trans-
mitting or
rotating the TUNING
CONTROL also
cancels the
scanning
function.
8-7
SCAN
RESUMPTION
After stopping due to a
received signal, all
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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