Cobra 148 GTL - Manual
Cobra 148 GTL – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – Section I Introduction; The CB Story
- Page 3 – Section II Specifications
- Page 4 – Section III Installation
- Page 6 – Section IV Operation
- Page 10 – Section V Maintenance and Adjustment
- Page 11 – Section VI Appendix
- Page 12 – If You Need Service
- Page 13 – COBRA CB RADIO ACCESSORIES; If you wish, you can order directly from Cobra; LIMITED TWO YEAR WARRANTY
- Page 14 – Cobra Electronics Corporation
How To Use Your
40-CHANNEL,
CITIZENS BAND
SSB/AM 2-WAY MOBILE RADIO
Model 148 GTL
Contents
Page
The CB Story ....................................................................................1
Section I: Introduction ......................................................................2
Section II: Specifications ..............................................................3, 4
Section III: Installation ........................................................5, 6, 7, 8
Section IV: Operation ................................................................9 - 17
Controls and Indicators ....................................................................9
A.Control Functions ..............................................................9, 10, 11
B.Indicator Functions ......................................................................12
Operating Procedure to Receive ......................................................12
Operating Procedure to Transmit ....................................................13
Receiving SSB Signals ..............................................................13, 14
Alternate Microphones and Installation ..............................15, 16, 17
Section V: Maintenance and Adjustment ..................................18 -21
FCC Warning ..................................................................................18
Section VI: Appendix ..........................................................19, 20, 21
Ten Code ........................................................................................19
A few Rules That Should Be Obeyed ..............................................20
How Your CB Can Serve You ..........................................................20
Use Channel 9 for Emergency Messages Only ................................21
Warranty Service Instructions ..........................................................22
Limited Two Year Warranty ..............................................................23
Cobra CB Radio Accessories ..................................Inside Back Cover
OPERATING INSTRUCTIONS FOR YOUR
40 CHANNEL
CITIZENS BAND
SSB/AM 2-WAY
MOBILE RADIO
Model 148 GTL
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Summary
Section I Introduction FREQUENCY RANGEThe COBRA 148GTL transceiver represents one of the most advanced SSB/AM two-way radios ever designed for use as a Class D station in the Citizens Radio Service.This unit features advanced Phase Lock Loop (PLL) circuitry, which is used in the AMmode and in the up...
RECEIVER Sensitivity SSB: 0.25 µV for 10dB (S+N)/N at greater than 1/2-watt of audio output. AM: 0.5 µV 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 Frequency AM: 7.8 M...
Section III Installation (Continued) IGNITION NOISE INTERFERENCE Use of a mobile receiver at low signal levels is normally limited by the presenceof electrical noise. The primary source of noise in automobile installations is fromthe generator and ignition system in the vehicle. Under most operating...
