Fm Operation - Icom ic-751a Instruction Manual

3)
Push the
AM
SWITCH.
-FILTER
SWITCH
(2)
AM
TRANSMITTING
6-6 FM OPERATION
(1)
FM
RECEIVING
IJIIB4JMJI
AM EKl cw BQ3
SSB RTTY|SQ3
0
Q Q ! Q
•SQUELCH FUNCTION
Raises the
threshold
level.
SQUELCH -®-TONE
4)
Tune
in
an
AM
signal
with the
TUNING
CONTROL
using the
meter to
peak
the
signal.
5)
Push the
FILTER
SWITCH
to select
the
narrow receive
selectivity.
FILTER SWITCH
BANDWIDTH
ON
(IN)
3kHz
OFF
(OUT)
8kHz
NOTE:
The
PBT
CONTROL
(passband tuning) has
no
effect
in
the
AM
mode.
6)
Refer to
SECTION
10
-
1
for installation
instructions for the
optional
FL-33
crystal
filter.
Transmitting an
AM
signal
is
essentially the
same
as
for
SSB
trans-
mission.
1)
Select the transmit
mode
with
either
the
T/R
SWITCH
or the
PTT SWITCH
on
the
microphone.
2)
Turn
the
RF
POWER CONTROL maximum
clockwise or
set
it
to
obtain the desired
power
output.
3)
Set the
METER
SWITCH
to the
Po
position.
4)
Adjust the
MIC GAIN
CONTROL
for
a slight
indication of the
meter needle while speaking into the
microphone
in a
normal
voice.
NOTE: MIC GAIN
CONTROL
settings
which
are
too high
result
in
overmodulation and
a
distorted signal.
Set the
MIC
GAIN
carefully.
5)
The
speech compressor
(COMP SWITCH)
should be turned
OFF
to
prevent
overmodulation
or distortion.
6)
Use
the
FILTER
SWITCH
to
select
the widest
selectivity position.
1
)
Push
the
FUNCTION
SWITCH,
then the
FM
SWITCH.
2)
Set the other switches
and controls the same
as
for
SSB
recep-
tion.
The
PBT
CONTROL,
NOTCH
SWITCH
and
CONTROL,
NOISE
BLANKER
SWITCH
and
CONTROL,
AGC
SWITCH
and
FILTER SWITCH
do not function
in
this
mode.
3)
When
tuning an
FM
signal,
tune
for
maximum
signal strength as
indicated
on
the
meter with
the clearest audio.
SQUELCH:
If
closed,
the squelch
mutes
all
noise
from
the
speaker
when no
signal
is
received.
This
Is
useful
while waiting
for
another
station
to
call.
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