Electra bearcat IV 사용 설명서 - 페이지 4

{카테고리_이름} Electra bearcat IV에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Electra bearcat IV 12 페이지. Fm monitor receiver

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CRYSTAT INSTALLATION

DISCONNECT POWER BEFORE REMOVING CABINET

L E A V E P O W E R O F F W H I L E I N S T A L L I N G C R Y S T A L S

To remove the cabinet, first remove the screw at the bot-

tom rear edge. Push the rear panel forward through the cab-

inet. The components and crystal sockets are in full view and

easily accessible.

Up to eight crystals may be installed in any combination

of L, H, or U/T bands. Each crystal is installed in the sockets

corresponding to its channel. (Channel I is nearest the side of

the radio)

The eight three-position slide switches select the desired

band for each crystal. To select "Lo"

Band (30-50mHz) for

a particular channel, place the corresponding switch in the

"L"

position. (Nearest the front of the radio). The center or

"H"

position of the switch selects

"Hi"

Band (150-l74mHz) and

the third or

o'U/T"

position is used for both

"U"

(450-470

mHz) andooT" (470-5l2mHz) bands.

Remove the crystal by a gentle pull upward. Insert the cry-

stal by aligning the pins with the sockets and pushing straight

down. DO NOT BEND THE SOCKETS. THESE \'IINIA-

TURE SOCKETS ARE N,IADE OF SPRING BRONZE AND

WILL BREAK OFF IF BENT EXCESSIVELY.

NOTE: Do not install two crystals of the same frequency.

Rigid qualiry' standards are applied to crystals furnished

by Electra Company to assure full performance. therefore our

warranty does not include correcting poor operation caused by

crystals from other sources.

The "U/T" alignment spread is 450mHz to ll2mH.z, the

"H" 150mHz to

l7[mHz, and the "L" 33m[z to ABmHz.

New frequencies may be added within these spreads.

CRYSTAL FORMULAS

'(L'r

Received frequency + 10.80 mHz = crystal frequency

Example:

35.80 mHz + f0.80 mHz = 46.600fi)

mHz

"H"

Received frequency -

10.80 mHz = crystal frequency

Example: 155.01 mHz - 10.80 mHz = 48.07000

,, UIT"

Received frequency -

10.80 mHz = cr1 stal frequency

Example: 453.250 mHz - 10.80 mHz = {9.16llI mHz

USER HINTS

Radio equipment usually operates in an environment of

man-made electro-magnetic noise which radiates from power

lines, fluorescent lights, motors, appliances, ignition systems,

etc. Modern radios are designed to minimize interference from

such sources but operation may be affected under conditions

of unusually strong noise.

Distant weak,

".hp"

or noise signals may be received by

this receiver because of its high sensitiuity. Whenever such

conditions interrupt scanning or whenever a very busy channel

prevents reception of other desired signals, the affected

channel may be bypassed by means of its individual panel

switch.

ln cases of strong interfering noise or signals it may be

desirable to reduce the length of the antenna to reduce noise

pickup below a critical level. This may be very effective in

medium and strong signal areas.

-Single-channel operation may be obtained as described

under Operating Instructions. It may also be accomplished

with the "\IANUAL-SCAN" switch in either position by lock-

ing out all but the desired channel. This assures that the radio

will alwavs be on that channel even when turned OFF and ON.

Continuous-carrier signals such as the ESSA weather broad-

casls on 162.55mH2, which are available in many areas, may

be received when desired by use of the individual channel

swi tches.

In mobile service the commonly encountered poor recep-

tion conditions are signal fading, nearhy faulty ignition

systems, power lines and proximity to strong signals. Careful

setting of the squelch control will minimize these conditions.

Shen moring or shipping the radio, remove the telescoping

antenna to avoid damage to it or to the internal circuit assem-

blies.

R A D I O S E R V I C E S

Locd Govemment

Specid Emergency

Police

Highway Maintenance

-Hospitds

Fire

Forestry-Conserration

-Ambulances

Press

Motion Pictures

-Physicians

Business

Special Indusbial

-Disaster Relief

Railroad

Telephone Maintenance

-School Busses

Taxicab

Automotile

Emergency

Power

Marine

Public Mobile Radio

Peholeum

Manufachrers

Mobile Telephones

Forest Products

Motor Carrier

Rural Radio

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