Icom IC-751A - Page 30

4)
Adjust the
AF GAIN CONTROL for the desired
volume.
5)
Rotate the
TUNING
CONTROL and search
for
a
signal.
Tune
across the
signal
to
peak the meter
needle while listening
for
the
most
intelligible audio.
(2)
SSB TRANSMITTING
1)
Select
the transmit
mode using
either the T/R
SWITCH or the
PTT
SWITCH.
2)
Set
the
METER SWITCH to
the
Po
position. Speak into
the
microphone in a
normal
voice. The
meter movement
indicates
that a
signal
is
being transmitted.
3)
The
TRANSMIT
INDICATOR
lights
whenever the
IC-751A
is
placed in the
transmit
mode,
however an
RF
signal is
only trans-
mitted when
the selected
operating
frequency
is
within an
Amateur
band.
4)
Set
the METER
SWITCH to the ALC
position, and
adjust the
MIC GAIN
for
a
meter
reading
within the ALC
zone on
voice
peaks.
NOTE: Listen carefully before transmitting
to
be sure
your
transmission
will not
Interfere
with
any
other
communica-
tions.
•VOX
OPERATION
Refer
to
SECTION
7-1.
•SPEECH COMPRESSOR OPERATION
Refer
to
SECTION 7
-
2.
•
USING THE MONITOR FUNCTION The
transmitted
signal can be
monitored when
using the SSB mode
if
desired. This is
useful
to
check the audio
quality of your output,
particularly important
when using
the speech compressor,
DSet
the
MONITOR/MARKER
SWITCH on
the
top
panel to
MONITOR.
6-4
CW
OPERATION
(1)
CW
RECEIVING
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2)
Adjust the
MONITOR
LEVEL CONTROL
on the top
panel to a
comfortable
audio
level.
It
is
preferable
to
use headphones to
prevent "howling"
caused
by
feedback
from the speaker to
the microphone.
For
CW
reception,
select
the
CW
or
CW
NARROW mode.
Audio
output
from the speaker is
muted when
the
CW
NARROW
mode is
selected
with no
optional narrow
filter installed.
Other switches
and
controls are set the
same
as
for SSB reception.
1
)
Push
the POWER SWITCH to
turn
ON
the
power.
2)
Push the CW
SWITCH.
3)
Set
the desired
operating
frequency.
4)
Adjust the
AF GAIN CONTROL
for
a
suitable
volume.
5)
When the
FILTER SWITCH is pushed
IN, the passband
tuning
system may be
used to set the
receiver
selectivity to
700Hz by
tuning
the PBT CONTROL to
the maximum
counterclockwise
or
clockwise
position, or
to
2.3kHz
by
placing the control
at the
detent. Additionally,
the notch filter eliminates
specific inter-
ference
at
discrete
frequencies within the passband
of the
receiver.
Refer
to
SECTIONS
7
-
7
and 7
-
8
for passband and
notch filter
operation.
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26
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