Icom IC-751A Instruction Manual

(2)
CW
NARROW
RECEIVING
amBSI
cwBBD
ssbBMrttyBE
The
IC-751A
has
already
FL-32A
(500Hz/-6dB)
filter
installed.
If
an
optional
narrow
filter
is
installed,
push
the
FUNCTION
SWITCH,
then
the CW
SWITCH
to
select
the
narrow
filter
thereby
improving
the
receiver
selectivity
with
higher
shape
factor.
Background
noise
is
reduced
and
the
signal-to-noise
ratio
(S/N)
is
improved
with
the
narrow
filter
for
more
enjoyable
listening
condi-
tions.
•OPTIONAL
FI
LTERS
1
)
The
chart
shows
the
optional
filters
available.
FILTER
CENTER
FREQUENCY
CHARACTERISTICS
(BANDWIDTH)
-6dB
-60dB
FL-52A
455kHz
500Hz
1.0kHz
FL-53A
455kHz
250Hz
480Hz
2)
Push the
FUNCTION
SWITCH,
then
the
CW
SWITCH
to
select
the
CW
NARROW
mode.
The
GW
NARROW
INDICATOR
lights
when the
function is
activated.
(3)
CW
TRANSMITTING
NOTE:
See
SECTION
4
-
5
CW
KEY for CW key
connections.
3)
Once the
CW
NARROW
mode is
selected,
follow
the
instructions
in
the CW
RECEIVING
section.
1)
Insert
the CW
key
plug
into
the
KEY
JACK
on
the
rear
panel
of
the
IC-751A.
2)
Set
the
switches
and
controls as
shown
in
the
chart.
SWITCH/CONTROL
POSITION
RF
POWER
MAX.
CLOCKWISE
METER
Po
VOX
GAIN
OFF
(MAX.
COUNTERCLOCKWISE)
3)
Select
the
transmit
mode
with the
T/R
SWITCH.
4)
Operate
the
CW
key.
The
meter
movement
indicates
that a
signal
is
being
transmitted.
•
CW
SIDETONE
MONITOR
An
700Hz
sidetone
oscillator
is
provided to
monitor
keying
when
in
the CW
mode.
The
MONITOR
LEVEL
CONTROL
varies
the
volume
of
the
tone.
This
control
is
located
on
the top
panel
of
the
transceiver.
•
Rotate
the
MONITOR
LEVEL
CONTROL
clockwise to
increase
the
volume
of the
oscillator
tone.
The
transceiver
AF GAIN
CONTROL
also
varies
the
volume.
• BREAK-IN
OPERATION
Refer to
SECTION
7
-
4
for
semi
or
full
break-in CW
operation.
6-5
AM
OPERATION
(1)
AM
RECEIVING
Set
all
controls
as
stated
in
SECTION 6
-
1
SETTINGS.
1)
Push IN
the
POWER
SWITCH.
2)
Select
the
desired
band
of
operation.
-
27
-

Icom IC-751A Specifications

General

Brand	Icom
Model	IC-751A
Category	Transceiver
Language	English