Icom IC-725 Instruction Manual

4
PRE-OPERATION
4-4
RECEIVER
CONTROLS
AND SWITCHES
Adjust
the
following controls
and
switches
on the front
panel
for
optimum
reception.
SQUELCH
CONTROL
Mutes
the
speaker.
Signals
and noises
that are stronger
than
the
squelch
threshold
level
open
the squelch
and
audio is
emitted
from the
speaker.
AF GAIN
CONTROL
Varies the
audio
output
level
from
the
speaker.
Clockwise
rotation
increases
the volume.
RIT CONTROL
Used for fine
tuning stations which call off
frequency
or
for
compensating for frequency drift.
Shifts the receive
frequency up
to
±1
kHz from the
displayed frequency
without
shifting the transmit
frequency.
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MW DOWN
CW/N SWITCH
By
installing an optional CW
narrow filter.
The
transceiver
has better
receive selectivity
in
CW
mode.
AGC
SWITCH
Out
position: AGC
slow
Normally used
when operating
in SSB
or
AM
mode.
In
position: AGC fast
Normally used
when operating in CW
mode.
Note that the AGC
switch does
not function
in FM mode.
PREAMP
SWITCH
Used
when
receiving weak
signals.
Push
[PREAMP]
to
the
IN
position to
improve
the S/N ratio
and sensitivity.
Especially
useful during
DX operation.
ATTENUATOR
SWITCH
Used
when the
received sound
from the
speaker is
distorted
by
very strong
signals.
Push [ATT] to
the IN
position to
activate
the 20 dB
attenuator.
NOISE BLANKER
SWITCH
Reduces pulse-type
noise
such
as
that
generated by auto-
mobile
ignition systems.
Note that the
noise blanker
function does not function
in
-AM and
FM modes and
may not
work well
when strong
signals are
on nearby
frequencies
or
when
noise is
con-
tinuous rather
than pulse-type.

Icom IC-725 Specifications

General

Brand	Icom
Model	IC-725
Category	Transceiver
Language	English