English dropdown-ico

Manual Cobra Electronics 148 GTL

14 pages 0.36 mb
Download

Go to site of 14

Summary
  • Cobra Electronics 148 GTL - page 1

    Ho w T o Use Y our 40-CHANNEL, CITIZENS B AND SSB/AM 2-W A Y MOBILE RADIO Model 148 GTL Contents P age T he CB Story .................................................................................... 1 Section I: Introduction ...................................................................... 2 Section II: Specifications ...................... ...

  • Cobra Electronics 148 GTL - page 2

    Section I Intr oduction FREQUENCY RANGE T he COBRA 148GTL transceiv er represents one of the most adv anced SSB/AM two- wa y radios ever designed for use as a Class D station in the Citizens Radio Service. T his unit features adv anced Phase Lock Loop (PLL) circuitry , which is used in the AM mode and in the upper and lower single sideband modes, p ...

  • Cobra Electronics 148 GTL - page 3

    RECEIVER Sensitivity SSB: 0.25 µ V for 10dB (S+N)/N at greater than 1/2-watt of audio output. AM: 0.5 µ V for 10 dB (S+N)/ at greater than 1/2-watt of audio output. Selectivity AM: 6dB @ 3 KHz, 50 dB @ 9 KHz. SSB: 6 dB @ 1.1 KHz, 60 dB @ 2.3 KHz. Image Rejection More than 65 dB . IF F requency AM: 7.8 MHz 1st IF , 455 KHz 2nd IF . SSB: 7.8 MHz. A ...

  • Cobra Electronics 148 GTL - page 4

    Section III Installation (Continued) IGNITION NOISE INTERFERENCE Use of a mobile receiv er at low signal levels is normally limited b y the presence of electrical noise. The primary sour ce of noise in automobile installations is from the generator and ignition system in the v ehicle. Under most operating conditions, when signal lev el is adequate, ...

  • Cobra Electronics 148 GTL - page 5

    Section III Installation (Continued) D . T ry a different location on y our car (keeping in mind the radiation pattern you wish). E. Is the antenna perfectly vertical? F . T ry a different location in y our neighborhood. Stay a wa y from large metal objects when adjusting (metal telephone or light posts, fences, etc.). NO TE T he COBRA 148GTL will ...

  • Cobra Electronics 148 GTL - page 6

    10 Section IV Oper ation (Continued) 4. SWR CAL CONTROL (outer dual concentric) . In order for you to ac hieve maximum radiated po wer and the longest range, it is important that y our antenna be in good condition, properly adjusted and matched to y our trans- ceiv er . T he Built-in SWR (standing w ave r atio) meter lets you easily measure your an ...

  • Cobra Electronics 148 GTL - page 7

    Section IV Oper ation (Continued) B. INDICA TOR FUNCTIONS 1. S-METER. Swings proportionally to the strength of the incoming signal. 2. RF METER . Swings proportionally to the RF output power . 3. SWR METER . Swings proportionally to the r atio of standing w a v e voltage and RF output. Used to properly adjusts the length of the antenna, and to moni ...

  • Cobra Electronics 148 GTL - page 8

    Section IV Oper ation (Continued) T hus when a v oice is used in place of a whistle or tone, in the proper listening mode the voice will be recei ved correctly whereas in the incorrect mode, the voice will be tr anslated backwards and cannot be made intelligible b y the voice lock control. When listening to an AM transmission, a correct sideband is ...

  • Cobra Electronics 148 GTL - page 9

    Section IV Oper ation (Continued) Fig. 2. Microphone Cable Preparation T o wire the microphone cable to the plug provided, proceed as follo ws. Fig. 3 . Microphone plug wiring. 1. Remove the retaining screw . 2. Unscrew the housing from the pin receptacle bod y . 3. Loosen the two cable clamp retainer screws. 4. F eed the microphone cable through t ...

  • Cobra Electronics 148 GTL - page 10

    18 Section V Maintenance and Adjustment T he COBRA 148GTL transceiv er is specifically designed for the environment en- countered in mobile installations. T he use of all solid state circuitry and its light weight result in high reliability . Should a failure occur , however , replace parts only with identical parts. Do not substitute. Refer to the ...

  • Cobra Electronics 148 GTL - page 11

    Section VI Appendix (Continued) A FEW RULES THA T SHOULD BE OBEYED 1. Y ou are not allowed to carry on a con versation with another station for more than fiv e minutes at a time without taking a one-minute break, to give others a chance to use the c hannel. 2. Y ou are not allowed to blast others off the air b y over -powering them with illegally a ...

  • Cobra Electronics 148 GTL - page 12

    If Y ou Need Ser vice If Y ou T hink Y ou Need Service, Call 773-889-3087 Y ou ma y be asked to send your unit to the Cobr a factory . It will be necessar y to furnish the following, in or der to hav e the product serviced and r eturned. 1. F or W arr anty Repair , include some form of proof-of-pur chase, such as a me - c hanical r eproduction or c ...

  • Cobra Electronics 148 GTL - page 13

    Description Part No. Cost Ea. X Qty . = Amount Replacement microphone with 4-pin connector for 148 GTL CA-73 $19.95 MOBILE POWER MICROPHONE Amplified Power Microphone with 4-pin connector for 148 GTL CA-75 $19.95 NOISE CANCEL MICROPHONE for 148 GTL CA-77 $39.95 ECHO POWER MICROPHONE or 148 GTL CA-79 $69.95 High Performance, Magnetic Mount Antenna. ...

  • Cobra Electronics 148 GTL - page 14

    2 PRINTED IN THAILAND ©COBRA ELECTRONICS CORPORA TION 1996 480-163-P- 001 Cobr a Electronics Corpor ation 6500 W . Cortland Street Chicago, IL 60707 ...

Manufacturer Cobra Electronics Category Two-Way Radio

Documents that we receive from a manufacturer of a Cobra Electronics 148 GTL can be divided into several groups. They are, among others:
- Cobra Electronics technical drawings
- 148 GTL manuals
- Cobra Electronics product data sheets
- information booklets
- or energy labels Cobra Electronics 148 GTL
All of them are important, but the most important information from the point of view of use of the device are in the user manual Cobra Electronics 148 GTL.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Cobra Electronics 148 GTL, service manual, brief instructions and user manuals Cobra Electronics 148 GTL. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Cobra Electronics 148 GTL.

Similar manuals

A complete manual for the device Cobra Electronics 148 GTL, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Cobra Electronics 148 GTL by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Cobra Electronics 148 GTL.

A complete Cobra Electronics manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Cobra Electronics 148 GTL - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Cobra Electronics 148 GTL, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Cobra Electronics 148 GTL, that we can find in the current document
3. Tips how to use the basic functions of the device Cobra Electronics 148 GTL - which should help us in our first steps of using Cobra Electronics 148 GTL
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Cobra Electronics 148 GTL
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Cobra Electronics 148 GTL in a specific country, if it was not possible to solve the problem on our own.

Do you have a question concerning Cobra Electronics 148 GTL?

Use the form below

If you did not solve your problem by using a manual Cobra Electronics 148 GTL, ask a question using the form below. If a user had a similar problem with Cobra Electronics 148 GTL it is likely that he will want to share the way to solve it.

Copy the text from the picture

Captcha
New picture

Comments (0)