Cobra 29 LTD DE LE How To Use Manual Download Page 17 | Manualshive

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Cobra 29 LTD DE LE How To Use Manual Download Page 17

Operation

17

RF Gain Control

RF Gain Control

The RF Gain is used to optimize reception in
strong or weak signal areas.

Note

The RF Gain is used to optimize
reception in weak signal areas.

Rotate

the RF Gain knob

counterclockwise

to reduce gain in strong signal areas. In weak
signal areas turn

clockwise

to increase gain.

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Summary of Contents for 29 LTD DE LE

Page 1: ...Control 17 Setting Delta Tune 18 Setting Squelch 18 To Transmit 20 Setting Dynamike 20 Transmit 21 RF Meter 22 External Speaker 23 PA Public Address 24 Home And Office Set Up 26 Temporary Mobile Set Up 27 How Your CB Can Serve You 28 A Few Rules You Should Know 28 Channel 9 Emergency Messages 28 CB 10 Codes 30 Frequency Ranges 32 29 LTD DE LE Specifications 33 Warranty Information 34 Optional Acce...

Page 2: ... starting the installation Select a location that is convenient for operation yet does not interfere with the driver or passenger The transceiver is usually mounted to the underside of the dash with the microphone bracket beside it Note The transceiver is held in the universal mounting bracket by two thumbscrews which allow for adjustment at a convenient angle The bracket includes two self tapping...

Page 3: ...Installation 3 continued Connect the antenna cable plug to the receptacle marked ANT on the back of the unit 3 ...

Page 4: ... visually check the vehicle s battery connection to determine which terminal positive or negative is grounded positive is the larger of the two to the engine block or chassis A negatively grounded vehicle has its negative lead grounded to the chassis In a negative grounded vehicle connect the red lead of the DC power cord to an accessory 12 volt fuse Connect the black lead to the negative side of ...

Page 5: ... microphone bracket on either side of the unit driver s left using two screws supplied Bracket should be placed under the dash so microphone is readily accessible 6 7 Attach the 4 pin microphone cable to receptacle on the front of unit and install unit on bracket securely 8 SIG 1 3 5 7 9 30dB 2 3 CAL RF SWR RF ...

Page 6: ... adequate grounding system and prevention of electrolysis between fittings in the hull and water CB Antenna Note For optimum performance in passenger cars the ideal antenna location is on the center of the roof Second choice is on the center of the trunk Note Because many newer trucks feature fiberglass door skins the outside mirror must be grounded to the chassis via a ground strap when antenna i...

Page 7: ...re being received the transceiver may be operated with the vehicle s engine turned off The unit requires very little current and therefore will not significantly discharge the vehicle s battery Even though the Cobra 29 LTD DE LE has an automatic noise limiter in some installations ignition interference may be high enough to make good communications impossible Many possibilities exist and variation...

Page 8: ...in the CB position Operation Turning On 8 Turning On Make sure the power cord antenna and microphone are connected to their proper connectors before starting 2 1 Rotate the On Off Volume knob clockwise to a normal listening level ...

Page 9: ...peration 9 Setting Channel Selector Setting Channel Selector Select one of forty channels and adjust volume The selected channel is indicated by the LED readout directly above the channel selector knob 1 ...

Page 10: ...SWR is high Switch to the CAL position 2 1 Calibrate for SWR Standing Wave Ratio SWR calibration is done to properly adjust the length of the antenna and to monitor the quality of the coaxial cable and all RF connections This calibration is critical in order to achieve optimum performance Select channel 20 ...

Page 11: ...doors must be closed No one should be standing near the antenna See your antenna directions for more complete information continued Push and hold mic button 3 While holding mic button adjust the SWR CAL knob so the meter needle swings to the CAL mark on the meter located on the right 4 ...

Page 12: ...t as possible Anything over 3 is not acceptable The antenna indicator will light A slight antenna height adjustment higher or lower may be required Repeat relcalibration steps Repeat the same steps two through five on Channel 1 and 40 This will check SWR for all channels 6 While still holding down the mic button set the S RF SWR CAL switch to the SWR position to read the SWR reading 5 ...

Page 13: ...Operation 13 Rotate the On Off Volume knob clockwise the green RX TX LED will be illuminated To Receive 1 To Receive ...

Page 14: ...ust be in the S RF position to read the meter Operation 14 1 S Meter S Meter Swings proportionately to strength of incoming signal when receiving Switch to NOR to select desired channel 1 Selecting A Channel Selecting A Channel ...

Page 15: ...ference When switched to ANL the Automatic Noise Limiter is activated This helps reduce noise created by the vehicle s electronics When switched to NB ANL position the RF Noise Blanker is also activated providing increased noise filtration When switched to OFF position all noise filtration will be turned off NB ANL ANL OFF Noise Blanker Automatic Noise Limiter Switch 1 ...

Page 16: ...Operation 16 Bright Dim Switch Bright Dim Switch Switch to BRT or DIM to control brightness of the channel indicator and multi function meter for day or nighttime driving 1 ...

Page 17: ... used to optimize reception in strong or weak signal areas Note The RF Gain is used to optimize reception in weak signal areas Rotate the RF Gain knob counterclockwise to reduce gain in strong signal areas In weak signal areas turn clockwise to increase gain 1 ...

Page 18: ...ions as a fine tune control enabling you to capture a more readable signal as well as eliminate adjacent channel interference Setting Squelch Squelch is the control gate for incoming signals Setting Delta Tune 18 Operation 1 1 Rotate Delta Tune knob to the center position for optimum tuning Gate closed Setting Squelch ...

Page 19: ...gnals in To achieve the Desired Squelch Setting DSS turn the Squelch control counterclockwise until you hear noise Now turn the control clockwise just until the noise stops This is the DSS setting 19 Operation 2 3 Gate open Gate set to Desired Squelch Setting DSS ...

Page 20: ...dio before transmitting Prolonged transmitting without an antenna or a poorly matched antenna could cause damage to the transmitter Be sure to read the F C C Rules and Regulations included with this unit before transmitting Operation 1 Select desired channel 1 Initially set fully clockwise so that maximum voice volume is available Dynamike may have to be reduced in some conditions ...

Page 21: ...smit Operation Transmit Push and hold mic button to transmit Transmitter is now activated When transmitting hold the microphone two inches from your mouth and speak in a clear normal voice Release to receive 1 ...

Page 22: ...Operation RF Meter 22 RF Meter This meter swings proportionately to the RF output outgoing signal while transmitting The S RF SWR CAL switch must be in the S RF position 1 ...

Page 23: ...Note The external speaker should have 8 ohm impedance and be rated to handle at least 4 0 watts When the external speaker is plugged in the internal speaker is automatically disconnected Note Cobra external speakers are rated at 10 watts Connect an external speaker to the external speaker jack on the rear panel 1 ...

Page 24: ... PA switch to PA position Note Speaker should have 8 ohm impedance and be rated to handle at least 4 0 watts Note The speaker should be directed away from the microphone to prevent acoustic feedback Note Activity on the CB channel will be heard through the PA speaker Adjust volume control to a normal listening level 1 2 ...

Page 25: ...Operation 25 Push and hold microphone button and speak in a normal voice Your voice will now transmit on the PA speaker Adjust PA speaker volume with the Dynamike control 3 4 ...

Page 26: ...Power Pack rated at a minimum of 2 amps and a properly installed base station antenna Home And Office Set Up 26 Warning Do not attempt to operate this transceiver by connecting it directly to 120 vac Note For further information call Cobra Customer Service 773 889 3087 1 Simply connect the red and black leads of the transceiver to the corresponding terminals of the power pack ...

Page 27: ...o purchase an optional automobile power adapter from your COBRA dealer This adapter and a magnetic mount antenna allow you to quickly install your transceiver for temporary use Connect properly installed and matched base station antenna Plug power cable into back of unit marked Power Be sure to observe polarity markings 2 3 ...

Page 28: ...ata Provide help in event of an emergency Provide direct contact with home or office Assist police by reporting erratic drivers Get local information to find destination Communicate with family and friends Suggest spots to eat and sleep Keep you alert while traveling A Few Rules You Should Know A Conversations cannot last more than 5 minutes with another station A one minute break is required to l...

Page 29: ... 10 No tornado sighted Yes Out of gas on I 95 at mile marker 211 No Out of gas in my driveway Yes Four car accident on I 94 at Exit 11 Send police and ambulance No Traffic moving smoothly on I 94 Yes Weather Bureau has issued thunderstorm warning Bring sailboat into port No Attention motorists Weather Bureau advises snow tomorrow will accumulate 4 to 6 inches Yes Fire in building at 539 Main Evans...

Page 30: ...ed 10 5 Relay message 10 6 Busy stand by 10 7 Out of service leaving 10 8 In service subject to call 10 9 Repeat message 10 10 Transmission completed standing by 10 11 Talking too rapidly 10 12 Visitors present 10 13 Advise weather roads 10 16 Make pick up at 10 17 Urgent business 10 18 Anything for us 10 19 Return to base 10 20 My location is 10 21 Call by phone 10 22 Report in person to 10 23 St...

Page 31: ... 44 Have a message for 10 45 All units within range please report 10 50 Break channel 10 60 What is next message number 10 62 Unable to copy Use phone 10 63 Net directed to 10 64 Net clear 10 65 Awaiting your next message assignment 10 67 All units comply 10 70 Fire at 10 71 Proceed transmission in sequence 10 77 Negative contact 10 81 Reserve hotel room for 10 82 Reserve room for 10 85 My address...

Page 32: ...B channels 1 26 965 21 27 215 2 26 975 22 27 225 3 26 985 23 27 255 4 27 005 24 27 235 5 27 015 25 27 245 6 27 025 26 27 265 7 27 035 27 27 275 8 27 055 28 27 285 9 27 065 29 27 295 10 27 075 30 27 305 11 27 085 31 27 315 12 27 105 32 27 325 13 27 115 33 27 335 14 27 125 34 27 345 15 27 135 35 27 355 16 27 155 36 27 365 17 27 165 37 27 375 18 27 175 38 27 385 19 27 185 39 27 395 20 27 205 40 27 40...

Page 33: ... dB 10KHz Image Rejection 80 dB typical Adjacent Channel Rejection 60 dB typical IF Frequencies Double Conversion 1st 10 695 MHz 2nd 455 KHz Automatic Gain Control AGC Less than 10 dB change in audio output for inputs from 10 to 50 000 microvolts RF Gain Control Adjustable for optimum signal reception Noise Blanker RF type Squelch Adjustable threshold less than 1µV Audio Output Power 4 watts Frequ...

Page 34: ...fic legal rights and you may also have other rights which vary from state to state Exclusions This limited warranty does not apply 1 to any product damaged by accident 2 in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs 3 if the serial number has been altered defaced or removed 4 if the owner of the product resides outside the U S A All implied wa...

Page 35: ...s For in vehicle use 634 081 9 001 0 60 Replacement Microphone Bracket For in vehicle use 741 080 9 001 0 45 21 Base Loaded Magnet Mount Antenna HG A1000 28 95 38 Base Loaded Magnet Mount Antenna HG A1500 28 95 54 Base Loaded Magnet Mount Antenna HG A2000 28 95 4 Pin Premium Noise Cancelling Microphone HG M84 74 95 4 Pin Premium Noise Cancelling Microphone Wood Grain HG M84W 74 95 ...

Page 36: ...lease fill out order form on next page and mail fax directly to Cobra Optional Accessories 5 Pin Premium Noise Cancelling Microphone HG M85 74 95 4 Pin Replacement Dynamic Microphone HG M73 19 95 4 Pin Noise Canceling Microphone HG M77 30 95 Dynamic External Speaker HG S100 21 95 Noise Canceling External Speaker HG S300 28 95 Noise Canceling With Talk Back External Speaker HG S500 32 95 Power Micr...

Page 37: ...he product serviced and returned 1 For Warranty Repair include some form of proof of purchase such as a mechanical reproduction or carbon or a sales receipt If you send the original receipt it cannot be returned 2 Send the entire product 3 Enclose a description of what is happening with the unit Include a typed or clearly print name and address of where the unit is to be returned 4 Pack unit secur...

Page 38: ...29 LTD DE LE Operating Instructions for your Cobra 29 LTD DE LE Edition CB Radio ...

Page 39: ... 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 req...

Page 40: ... 10 RX Receive TX Transmit LED Indicator 11 Channel 9 Normal Switch 12 Dimmer Switch 13 CB PA Switch 14 NB ANL ANL Off Switch 15 S RF SWR CAL Switch 16 Signal Strength Meter 17 Microphone Back Side 18 Public Address Speaker Jack 19 External Speaker Jack 20 Antenna Connector 21 Power Jack Controls and Indicators A2 1 2 3 4 5 6 7 20 21 16 8 10 18 19 11 12 13 14 15 17 9 ...

Page 41: ...he manual you still need help call Cobra Customer Service at 773 889 3087 Cobra Customer Service Live operators are available M F 8 00 am 6 00 pm CST at 773 889 3087 Automated Technical Assistance available 24 hours a day seven days a week E mail questions to productinfo cobra com Cobra on the World Wide Web Frequently Asked Questions FAQ can be found on line at www cobra com Our Thanks to You A3 ...

Page 42: ...5 120 01 160 00 11 75 160 01 and up 14 50 For AK HI and PR please add an additional 15 00 for UPS shipments Item Description Cost Ea Qty Amount 426 002 N 001 Replacement DC Power Cord 7 50 251 353 9 001 Replacement Mounting Bracket 4 50 634 081 9 001 Replacement Thumb Screws 0 60 741 080 9 001 Replacement Microphone Bracket 0 45 HG A1000 21 Base Loaded Magnetic Mount Antenna 28 95 HG A1500 38 Base...

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