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Icom IC-701

Icom IC-701
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SECTION
2
FEATURES
ALL.
BAND,
ALL
MODE,
ALL
SOLID
STATE
The
IC-701
covers
all
the
Amateur
HF
frequencies
from
1.8MHz
to
29.999.9MHz
plus
15MHz
WWV.
It
offers
not
only
SSB,
but
also
CW
and
RTTY.
All
of
the
circuits
in
the
IC-701,
including
the
driver
and
final
power
stages
are
completely
solid
state,
and
provide
about
100
Watts
output.
COMPUTER
COMPATIBLE
TUNING
SYSTEM
The
local
oscillator
circuit
(VFO)
employs
a
C-MOS
LSI!
for
the
PLL
that
has
been
custom-made
on
the
basis
of
ICOM’s
advanced
digital
technology.
The
VFO
circuit
is
a
digital
PLL
circuit
that
controls
frequency
determination
by
pulses
produced
by
the
tuning
control.
Unlike
conventional
PLLs,
it
controls
the
VCO
by
combining
and
dividing
crystal
oscillator
frequencies.
Therefore,
its
stability
is
much
higher
than
conventional
VFOs.
In
addition,
the
pulse
control
system
makes
it
possible
to
set
and
change
frequencies
with
external
digital
signals.
With
a
computer
programmed
and
connected
to
the
rear
accessory
socket,
you
can
easily
control
frequencies,
change
bands,
scan,
on
the
IC-701.
This
system
will
give
you
the
maximum
of
performance
and
versatility.
DUAL
DIGITAL
VFO’S
The
IC-701
contains
two
built-in
digital
VFO’s
located
in
ICOM’s
custom
LSI,
providing
the
ultimate
in
versitility.
DIGITAL
READOUT
AND
FULL
METERING
The
frequency
is
presented
in
bright
easy
to
read
LEDs,
with
no
backlash
or
waiting
time.
The
mulit-function
meter
shows
you
relative
signal
strength
in
receive,
power
output,
ALC,
SWR,
compression
level,
final
transistor
voltage
and
current.
All
the
important
information
you
need
to
know.
PASS
BAND
TUNING AND
SPEECH
PROCESSOR
The
IC-701
has
a
built-in
Pass
Band
Tuning
system
developed
by
ICOM
that
allows
you
to
continuously
adjust
the
pass
band
of
the
IF.
By
turning
the
control,
you
can
eliminate
interference
from
a
nearby
signal,
thus
providing
clear
reception.
It
can
also
be
used
as
a
tone
control.
During
transmit,
the
Pass
Band
Tuning
circuit
can
be
used
as
a
Speech
Processor
providing
increased
“talk
power”
for
outstanding
D
Xing.
OUTSTANDING
PERFORMANCE
The
RF
amplifier
circuit
using
MOS
FETs,
the
Schottky
barrier
diode
balanced
mixer
and
other
circuits
provide
excellent
Cross
Modulation
and
Two-Signal
Selectivity
characteristics.
The
IC-701
has
excellent
sensitivity
demanded
especially
for
mobile
operation,
high
stability,
and
with
two
Crystal
Filters
having
high
shape
factors,
exceptional
selectivity.
The
Same
Schottky
diode
mixer
is
used
in
the
transmitter,
and,
with
the
band
pass
filter
and
high
performance
K-Constant
two
stage
low-pass
filter,
ensures
transmission
of
pure
signals
with
very
low
spurious
emission.
ADDITIONAL
CIRCUITS
The
IC-701
has
a
built-in
Noise
Blanker,
VOX,
an
Auto
Dimmer
for
control
of
the
readout
and
meter
illumination,
CW
Monitor,
APC,
SWR
detector,
and
many
other
circuits
for
your
convenience.
The
IC-701
has
everything
you
need
to
really
enjoy
HF
operation,
in
an
extremely
compact,
rugged
transceiver.
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