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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.
S P EC I FI C A T IO NS
S i z e : 9 " W x 3 5 / B " H x 6 l / B " D
Weight: 5lbs.
cabinet: Heavy duty vinyl-clad steel. Non-sliding feet.
Pow er R equi remen ts : l l?Vac , 1 5W ; l 3. B V dc, 10 W '
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.
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