Cobra Electronics 21 LTD CB Story, Cuts Static coming in, adds Punch going out

21LTDST.MANUAL.REV.QX 9/25/98 10:59 AM Page 3

How To Use Your

Citizens Band
2-Way Mobile Radio
Model 21 LTD ST
Contents	Page
The CB Story	1
SoundTracker System	1
Specifications	2,3
Installation
Location	4
Mounting Connections	4, 5
CB Antenna	6
Ignition Noise Interference	7
In House Operation	7
Operation
Controls and Indicators	8, 9, 10
Operating Procedure to Receive	11
Operating Procedure to Transmit	12
How SoundTracker Works	13
Maintenance and Adjustment	14
Appendix
Ten Code	15
A Few Rules That Should Be Obeyed	16
How Your CB Can Serve You	16
Warranty Service Instructions	17
Limited Two Year Warranty	18
Accessories	Inside Back Cover

The CB Story

The Citizens Band lies between the shortwave broadcast 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 control frequencies.)

FCC regulations permit only “transmissions” (one party to another) rather than “broadcasts” (to a wide audience). Thus, advertising is not allowed on CB Channels because that is “broadcasting.”

“Cuts Static coming in, adds Punch going out!”

Cobra proudly introduces the first Patent Pending technology that dramatically improves the transmission and reception of CB radio signals.

This revolutionary system reconfigures the transmission signal which allows it to be transferred more effectively through cluttered airwaves. It literally “punches” your message through the hundreds of thousands of signals that are in the air. At the same time, SoundTracker system dynamically adjusts the relationship between the signal and static commonly referred to as noise. This allows Cobra’s SoundTracker system to significantly reduce the amount of static on all incoming CB signals. The system can be further optimized when two SoundTracker CB’s are used to talk to each other.

The end result is a clearer, cleaner sounding reception of signals and more powerful transmissions which dramatically improve CB Communications

All transmitter adjustments other than those supplied by the manufacturer as front panel operating controls, must be made by, or under the supervision of, the holder of an FCC-issued general Radio-Telephone Operator’s License.

Replacement or substitution of transistors, regular diodes or other parts of a unique nature, with parts other than those recommended by Cobra, may cause violation of the technical regulations of Part 95 of the FCC Rules, or violation of Type Acceptance requirements of Part 2 of the Rules.

You should read and understand Part 95 (included with this unit) of the FCC Rules and Regulations, before operating your Cobra radio, even though the FCC no longer requires you to obtain an operators license.

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