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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.
-
26
-
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