Icom ic-751a Instruction Manual page 10

d)RF GAIN
CONTROL
SQUELCH
-S>-TONE
Raises the
threshold
level.
(0)TONE
CONTROL
SQUELCH
^TONE
Treble
(Q)MIC
GAIN
CONTROL
MIC GAIN -®-RF
PWR
®RF
POWER CONTROL
MIC GAIN
-^RF PWR
@
FUNCTION SWITCH
This control
varies the gain of the
RF
stage
when
the transceiver
is
in
the receive
mode.
Rotate the control
fully
clockwise
for
maximum
gain.
When
tuning
in
the
SSB
or
CW
mode,
the S-meter
needle
rises as
the control
Is
rotated counterclockwise
and
only
those
signals
stronger
than the
level
indicated
by
the needle are
heard.
This control
sets
the squelch threshold
level.
To
turn
OFF
the
squelch function, rotate
this
control
completely counterclockwise.
To
set
the threshold
level
higher, rotate
the control clockwise.
Adjust
this
control clockwise
until
the green
RECEIVE
indicator
just goes
out while no
signal
is
being
received.
This control
varies
the
receive
audio
tone.
Adjust the control to
provide the
clearest,
most
pleasing audio.
Adjust
this
control
for
a
suitable
modulation
level
while speaking
into the
microphone
in
a
normal
voice.
Rotate the control clock-
wise to increase the
gain.
This control varies the
RF
output
power from
10
watts to
maximum.
•
SSB
:
100W PEP
•
CW, RTTY,
FM
:
100W
•
AM
:
BOW
Rotate the control clockwise to increase the output power. Use
the
minimum
power
necessary for
reliable
communication.
This switch
activates
the secondary switch functions
on
the front
panel
as
indicated
by
the reverse-image
lettering
(white
letters
on
a
black
background).
©FUNCTION
INDICATOR
©MODE
SWITCHES
am
i™
CWPP3
SSB
I3M
RTTYlSna
The
FUNCTION INDICATOR
lights after
the
FUNCTION
SWITCH
Is
pushed, and
indicates
that the secondary switch func-
tions are activated.
AM:
Push
for
AM
operation.
FM:
Push
the
FUNCTION SWITCH
first,
then push
the
AM
SWITCH
to select
the
FM
mode.
CW:
Push
for
CW
operation with the standard
filters.
-
6
-