Cobra Electronics 29 LTD ST инструкция обслуживания

OPERA TING INSTRUCTIONS FOR YOUR 40 CHANNEL CITIZENS BAND 2-W A Y MOBILE RADIO Model 29 L TD ST Cobr a Electr onics Corpor ation 6500 W . Cortland Street Chicago, IL 60707 PRINTED IN HONG KONG ©COBRA ELECTRONICS CORP . 1997 480-1 13-P-001[...]

The Citizens Band lies between the shortwave br oadcast and 10-meter Amateur radio bands, and was established by law in 1949. The Class D two-way commu- nications service was opened in 1959. (CB also includes a Class A citizens band and Class C remote contr ol fr equencies.) FCC regulations permit only ÒtransmissionsÓ (one party to another) rathe[...]

Specifications (cont.) GENERAL Channels 40 Frequency Range 26.965 to 27.405 MHz. Fr equency Contr ol Phase Lock Loop (PLL) synthesizer . Frequency T olerance 0.005%. Operating T emperature Range -30¡ C to + 50¡ C. Microphone Plug-in dynamic. Input V oltage 13.8VDC nom.(positive or negative ground). Current Drain T ransmit : AM full mod., 1.5A (ma[...]

5 Installation (Cont.) 3. Connect the antenna cable plug to the standard r eceptacle on the unit. Most CB antennas are terminated with a type PL-259 plug which mates with the r eceptacle marked "ANT ." 4. Connect the red lead of DC power cor d to +13.8 VDC. In automobile instal- lations, +13.8 VDC is usually obtained from the accessory co[...]

7 Installation (Cont.) Ignition Noise Interference Use of a mobile receiver at low signal levels is normally limited by the pr esence of electrical noise. The primary source of noise in automobile installations is fr om the alternator and ignition system in the vehicle. Under most operating conditions, when signal level is adequate, the background [...]

Operation (Cont.) 9 6. DEL T A-TUNE. For normal operation, set this control to the center posi - tion. This feature has several uses and can gr eatly enhance receiver oper- ation. If a received signal is slightly of f frequency , the Delta-T une control can be used to Òfine-tuneÓ your receiver . Fine tuning is accomplished by listening for a more[...]

Operation (Cont.) 1 1 C. Rear Panel 1. PUBLIC ADDRESS: An external 8-ohm 4.0 watt P A speaker may be connect- ed to the P A Speaker Jack when this unit is used as a public addr ess system. The speaker should be directed away fr om the micr ophone to pr event acoustic feed-back. Physical separation or isolation of the microphone and speaker must be [...]

13 12 Operation (Cont.) Operating Procedure to Receive 1. Be sure that the power cor d, antenna and micr ophone ar e connected to the proper connectors befor e proceeding further . The P A/CB should be in the CB position. 2. T urn the radio ON by rotating the VOLUME CONTROL clockwise. 3. Set the RF GAIN CONTROL fully clockwise. 4. Set DEL T A-TUNE [...]

15 14 Maintenance and Adjustment The COBRA CB transceiver is specifically designed for the environment encoun- ter ed in mobile installations. The use of all solid state cir cuitry and its light weight r esult in high r eliability . Should a failure occur , however , review the following, then if necessary , r eplace parts only with identical parts[...]

Appendix (Cont.) A Few Rules That Should Be Obeyed 1 . Y ou a r e not allowed to carry on a conversation with another station for mo r e than five minutes at a time without taking a one-minute b r eak to give others a chance to use the channel. 2 . Y ou a r e not allowed to blast others o f f the air by overpowering them with illegally amplified tr[...]

W arranty and Service Limited T wo Y ear W arranty COBRA ELECTRONICS CORPORA TION warrants that its COBRA citizens band (CB) radio, and the component parts thereof, will be fr ee of defects in workmanship and materials for period of two (2) year from the date of first con - sumer purchase. This warranty may be enfor ced by the first consumer purcha[...]