Electra bearcat IV - General Description; Specifications

GENERAL
DESCRIPTION
The
Bearcat
IV
is a
table
and
mobile
model,
four-band
FM
monitor
receiver
providing
automatic
scanning
of
B
channels
in
all
of
the
four
Public
safety/Business
Bands
at
30-50mHz,
146-l74m]Hz,
450-470mH2,
and
4?0-5L2mHz.
Its
features
in-
clude:
Full-band
coverage
in
all
4 bands;
B
plug-in
crystals
in
any
combination
may
be
used;
high
speed
automatic
or
man-
uai scanningi
channel
switches
to
omit
scanning
of
undesired
channels;
solid
state
l,ight
Emitting
Diode
channel
indicators;
quieting
squelch
control;
front-mounted
3"x5" speaker;
ex-
ternal
speaker
jack;
cables
for llTV
ac or
l2V
dc
operation;
and
operation
from
a single
telescoping
or
outside
antenna.
The
most
advanced
developments
in solid
state
circuitry
are
incorporated
in
this
receiver;
dual-gate
MOS
ltield
Effect
r-f
and
mixer
transistors
provide
low
noise
and
low
cross-
modulation.
Single
"orr""ri*
into
monolithic
quartz
crystal
i-f
filters
reduces
spurious
resPonses
and
radiation
and
i-p.ou",
selectivity;
linear
inteEated
circuits
provide
i-f
gri;,
detection,
",rdio
amplification
and
output;
TTL
I'C'
multivibrators
and
gates
prbuidr
scanning
logic;
desired
chan'
nels
are
scanned
"*ith
't
o
time
lost
scanning
unwanted
channels."'-"4;;"clusive
track-tuning
system
using
voltage-variable
ca-
pacitators
provides
high
performance
full-band
coverage.
SPECI
FICATIONS
Size:
9"W
x 35/B"H
x 6l/B"D
Weight:
5lbs.
cabinet:
Heavy
duty
vinyl-clad
steel.
Non-sliding
feet.
Power
Requirements:
ll?Vac,
15W;
l3.BVdc,
10W'
Antenna:
Telescoping
antenna
(supplied).
Connector
provided
for
outside
or
mobile
antenna
Input
lmpedance:
50-70
ohms.
sensitivity:
H and
L
bands:
readable
at
.25
microvolt
for
1
SkHz
deviation'
.6
microvolt
for
20
dB
signal-to-noise
ratio:
U/T
band
slightly
less.
Channels:
Up to
B crystal-controlled
channels
may
be scanned
automatically
or
selected
individually
or in any
combination.
Frequency
Range:
Low
band
30-50
mHz
(Aligned
33-4BmHz)
High
band 150-1?4
mHz,
total
spread24
mIJz'
UHF
band
450470
mHz,
total
spread
20
mHz'
UHF
"T"
band
470'512
mHz,
total
spread
42
mHz
Scan
Rate:
Approximately
25
channels
per second.
Crystals:
Miniature plug-in
type
HC-25/U
for
easy user
installation.
Accessories
Supplied:
All-band
telescoping
antenna
/
Universal
mobile
mount-
ing
bracket
I
'itZ
Vac power
cable
i
t-g.g
Vdc
_po-wel-q"!l^q--(!onnects
to
ilX"."oo.""
or
"Radio"
iuse block.
FOR
USE
WITH NEGATM
GROUND
SYSTEMS
ONLY).
Front
Panel
Features:
Squelch
control
/
Volume
on-off
control
/
Combined
Manual-Scan
Channel
Select
Switch
/
B
channel
switches
/
B
Light
Emitting
Dode
channel indicators
/
Forward-facing
3"
x 5" speaker'
Iisted
by Underwriters'
Laboratories,
Inc.
Certified
under
FCC
Reg.
Part 15.
-2-