Instruction/ maintenance manual of the product 2010 GTL WX Cobra Electronics
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40 CHANNEL SOLID ST A TE CITIZENS B AND SSB/AM TW O-W A Y RADIO B ASE ST A TION W ith Sev en W eather Channels and NO AA Emergenc y Alert T one OPERA TING INSTRUCTIONS FOR Y OUR Model 2010 GTL WX.
How T o Use Y our SOLID ST A TE CITIZENS B AND SSB/AM 2-W A Y RADIO B ASE ST A TION Model 2010 GTL WX Contents Page The CB Story .................................................................................... 1 Section I: Introduction ...........
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 communications service was opened in 1959. (CB also includes a Class A citizens band and Class C remote control frequencies.
Section I Introduction FREQUENCY RANGE The COBRA 2010 GTL WX transceiver represents one of the most advanced AM base station radios used as a Class D station in the Citizens Radio Service. This unit features advanced Phase Lock Loop (PLL) circuitry providing complete coverage of all 40 channels as shown below.
Section II Specifications GENERAL Channels 40. Frequency Range 26.965 to 27.405 MHz. Frequency Control Phase Lock Loop (PLL) synthesizer. Frequency Tolerance ± 130 Hz Typical. Operating Temperature Range -30 ° C to + 50 ° C. Microphone Plug-in type; 600 Ω dynamic.
Section II Specifications (Cont.) 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.
5 Section III Installation LOCATION Prior to beginning operation of the transceiver, a basic installation must be prepared. Installation of the transceiver itself is a rather simple procedure. In selecting the location for the unit, two basic factors must be considered: 1.
Section IV Operation CONTROLS AND INDICATORS There are eighteen controls, 2 meters, 1 LCD and 1 jack on the front panel of your 2010 GTL WX. A. CONTROL FUNCTIONS 1. POWER SWITCH. Press in to turn on radio. Press in, again, and release to turn off radio.
7 Section IV Operation (Continued) 6. SWR CAL CONTROL . In order for you to achieve maximum radiated power and the longest range, it is important that your antenna be in good condition, properly adjusted and matched to your transceiver. The Built-in SWR (standing wave ratio) meter lets you easily measure your antenna condition.
8 Section IV Operation (Continued) 15. PRESS-TO-TALK MICROPHONE . The receiver and transmitter are controlled by the press-to-talk switch on the microphone. Press the switch and the transmitter is activated; release switch to receive. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal "voice.
9 SWR CAL SWR MOD CAL LSB AM USB MIN FREQ. CTR CLOCK AM / SSB BASE STATION WITH WEATHER ALERT AM / SSB BASE STATION WITH WEATHER ALERT HOUR VOICELOCK MAX MIN RF GAIN DYNAMIKE POWER PHONE VOLUME MIC SQUELCH COARSE NB SWR CAL 100% 0 1.
10 OPERATING PROCEDURE TO RECEIVE 1. Place the WX/CB Switch in the CB position. 2. Turn the set ON by pressing the POWER Switch. 3. Adjust the VOLUME for a comfortable listening level. 4. Set the Channel selector switch to the desired channel. 5. Set RF GAIN fully clockwise.
OPERATING PROCEDURE TO RECEIVE WEATHER BAND continued 3. If threatening weather is nearby, the National Weather Service may broadcast a 10 second alert tone. This tone will be heard through the CB, even if the WX/CB Switch is in the CB mode or the unit is turned off (see NOTE below).
12 RECEIVING SSB SIGNALS There are three types of signals presently used for communications in the Citizens Band: AM, USB, and LSB. When the MODE switch on your unit is placed in the AM position, only standard double-sideband, full carrier signals will be detected.
RECEIVING SSB SIGNALS continued Once the desired SSB mode has been selected, frequency adjustment may be necessary in order to make the incoming signal intelligible, the VOICE LOCK control allows the operator to vary frequency above and below the exact-center frequency of the received signal.
14 Section V Maintenance and Adjustment The COBRA 2010 GTL WX transceiver is specifically designed for the environment encountered in base station installations. The 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.
15 10-37 Wrecker needed at 10-38 Ambulance needed at 10-39 Your message delivered 10-41 Please turn to channel 10-42 Traffic accident at 10-43 Traffic Tie up at 10-44 I have a message for you 10-45 Al.
16 Section VI Appendix (Continued) A FEW RULES THAT SHOULD BE OBEYED 1. You are not allowed to carry on a conversation with another station for more than five minutes at a time without taking a one-minute break, to give others a chance to use the channel.
Section VI Appendix (Continued) 17 USE CHANNEL 9 FOR EMERGENCY MESSAGES ONLY FCC gives the following examples of permitted and prohibited types of communica- tions for use on Channel 9. These are guidelines and are not intended to be all- inclusive. Permitted Example Message Yes ”A tornado sighted six miles north of town.
Section IV Operation (Continued) ALTERNATE MICROPHONES AND INSTALLATION For best results, the user should select a low-impedance dynamic type microphone or a transistorized microphone. Transistorized type microphones have a low output impedance characteristic.
Section VI Appendix (Continued) Fig. 4 . Microphone plug pin numbers viewed from rear of pin receptacle. Be sure that the housing and the knurled ring of Fig.
20 Section VI Appendix (Continued) Fig. 2. Microphone Cable Preparation To wire the microphone cable to the plug provided, proceed as follows. Fig. 3 . Microphone plug wiring. 1. Remove the retaining screw. 2. Unscrew the housing from the pin receptacle body.
21 If Y ou Need Ser vice If You Think You Need Service, Call 773-889-3087 You may be asked to send your unit to the Cobra factory. It will be necessary to furnish the following, in order to have the product serviced and returned.
W ARRANTY 22 Limited Two Year Warranty COBRA ELECTRONICS CORPORATION warrants that its COBRA citizens band (CB) radio, and the component parts thereof, will be free of defects in workmanship and materials for period of two (2) year from the date of first consumer purchase.
Amount (Tax if applicable ★★ ) Shipping / handling $3.50 Total ★★ Description Part No. Cost Ea. X Qty. = Amount COBRA CB RADIO ACCESSORIES CUT ALONG DOTTED LINE FOLD THIS FLAP OVER BOTTOM AND TAPE IT DOWN AND SIDES TO CLOSE FOLD ALONG THIS LINE FIRST FOLD ALONG THIS LINE SECOND Allow 4 to 6 weeks delivery.
PRINTED IN MALAYSIA ©COBRA ELECTRONICS CORP. 1996 480-114-P-001 FOLD HERE TO MAKE SELF MAILER PLACE STAMP HERE Cobra ® Cobra Electronics Corporation 6500 W.
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