19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 1 place stamp here Cobra Electronics Corporation 6500 W. Cortland Street Chicago, IL 60707 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 2 This device complies with Part 15 of the F.C.C. rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference and (2) This device must accept any interference received, including interference that may cause undesired operation. PRINTED IN THAILAND ©COBRA ELECTRONICS CORP. 1997 480-192-P-001 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 3 HOW TO USE YOUR 40 CHANNEL CITIZENS BAND 2-WAY MOBILE RADIO WITH INSTANT EMERGENCY CHANNEL 9 19 ULTRA II MODEL 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 4 HOW TO USE YOUR 40 CHANNEL CITIZENS BAND 2-WAY MOBILE RADIO MODEL 19 ULTRA II Contents Page The CB Story ..................................................................................................1 Introduction Frequency Range........................................................................................2 Specifications ..................................................................................................3 Installation Location ......................................................................................................4 Mounting and Connections ..................................................................4-5 CB Antenna ................................................................................................6 Ignition Noise Interference ......................................................................7 Operation Controls and Indicators ....................................................................8-9-10 Operating Procedure to Receive ............................................................11 Operating Procedure to Transmit ..........................................................11 Maintenance and Adjustment ....................................................................12 Appendix Ten Code....................................................................................................13 A Few Rules That Should Be Obeyed ..................................................14 How Your CB Can Serve You ................................................................14 Use Channel 9 for Emergency Messages Only....................................15 If You Need Service......................................................................................16 Limited Two Year Warranty ......................................................................17 Accessories ..........................................................................Inside Back Page 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 5 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 communications service was opened in 1959. (CB also includes a Class A citizens band and Class C remote control frequencies.) FCC regulations permit only ÒtransmissionsÓ (one party to another) rather than ÒbroadcastsÓ (to a wide audience). Thus, advertising is not allowed on CB channels because this is Òbroadcasting.Ó 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. Citizens Band (CB) Radio operators are no longer required to obtain an FCC license to operate their CB equipment or provide station identification. Nevertheless, an operator of a CB radio station is still required to comply with the communications act and with the rules of CB Radio Operation. Serial No. Date of Purchase Dealer Name Keep this manual for detailed information about your Cobra CB Radio System. SAVE YOUR SALES RECEIPT, THE CARTON AND "PACKING" FOR POSSIBLE FUTURE USE. 1 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 6 Introduction Frequency Range Your COBRA CB radio provides high-level, trouble-free performance over the following frequency assignments: Channel Frequency Frequency Channel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 in MHz 26.965 26.975 26.985 27.005 27.015 27.025 27.035 27.055 27.065 27.075 27.085 27.105 27.115 27.125 27.135 27.155 27.165 27.175 27.185 27.205 Channel 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Chann in MHz 27.215 27.225 27.255 27.235 27.245 27.265 27.275 27.285 27.295 27.305 27.315 27.325 27.335 27.345 27.355 27.365 27.375 27.385 27.395 27.405 These frequencies are generated and accurately controlled by a phase lock hoop (PLL) circuit, comprised of the latest state-of-the-art integrated circuit technology, ensuring high reliability and excellent frequency stability on the above channels. To obtain maximum performance please read carefully the descriptions and operating instructions in this manual. 2 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 7 Specifications GENERAL Channels Frequency Range Frequency Control Frequency Tolerance Operating Temp. Range Microphone Input Voltage Current Drain Size Weight Antenna Connector Semiconductors Meter 40. 26.965 to 27.405 MHz. Phase-Locked Loop (PLL) synthesizer. 0.005% -30¡C to +50¡C. Plug-in type; Electret condenser. 13.8V DC nom. (negative ground) Transmit: AM full mod., 1.5A (maximum). Receive: (Squelched, 0.115A, full audio output 1.0A (nominal). 6-5/8ÓD x 4-9/16ÓW x 1-13/16ÓH (165mm x 116 mm x 44 mm.) 3 lbs., 4 oz. (1.0 kg.). UHF, SO-239. 22 transistors, 17 diodes, 3 integrated circuits, 7 LEDs. Indicates relative power output and received signal strength. 4 watts. High- and low-level Class B amplitude. 300 to 3000 Hz. 50 ohms, unbalanced. Output transistors protected against mismatch up to 20:1 Less than 1µV for 10dB(S + N)/N. 6 dB @ 7 KHz, 55dB @ 15 KHz. 60 dB typical. 50 dB, typical. Double conversion, 1st: 10.695 MHz. 2nd: 455 KHz. Less than 10dB change in audio output for inputs from 10 to 50,000µV Adjustable; threshold less than 1µV. 3 watts. 300-3000Hz. Less than 10% @ 3 watts @ 1000 Hz. 8 ohms, round. 8 ohms; disables internal speaker when connected. TRANSMITTER Power Output Modulation Frequency Output Impedance Output Protection RECEIVER Sensitivity Selectivity Image Rejection Adjacent CH. Rejection IF Frequencies Automatic Gain Control (AGC) Squelch Audio Output Power Frequency Response Distortion Built-in Speaker External Speaker (Not Supplied) PA SYSTEM Power Output 4 watts into external speaker. External Speaker for PA 8 ohms; a separate jack is provided. (Not Supplied) (Specifications subject to change without notice.) 3 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 8 Installation Location Plan the location of the transceiver and microphone bracket before starting the installation. Select a location that is convenient for operation and does not interfere with the driver or passengers in the vehicle. In automobiles, the transceiver is usually mounted to the underneath of the dash panel, with the microphone bracket beside it. Mounting Connection The transceiver is held in the universal mounting bracket by two thumb screws, permitting adjustment at the most convenient angle. A universal mounting bracket is supplied along with self tapping screws and star washers. The mounting must be mechanically strong and also provide a good electrical connection to the chassis of the vehicle. To mount the transceiver: 1. Determine the most convenient location in your vehicle. Hold the COBRA radio with mounting bracket in the exact location desired. If nothing will interfere with mounting it in the desired position, remove the mounting bracket and use it as a template to mark the location for the mounting screws. 2. Drill necessary holes and secure mounting bracket in location. 4 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 9 Installation (Cont.) 3. Connect the antenna cable plug to the standard receptacle on the 4. Connect the red lead of DC power cord to +13.8VDC. In automounit. Most CB antennas are terminated with a type PL-259 plug which mates with the receptacle marked ÒANT.Ó bile installations, +13.8VDC is usually obtained from the accessory contact in the fuse box. This prevents the set being left on accidentally and also permits operating the unit without the vehicleÕs engine running. Before installing the CB radio, visually check the vehicle battery connections to determine which battery terminal, positive or negative (positive is the larger of the two) is grounded to the engine block (or chassis). 5. Connect the black lead to the negative side of the automobile. This is usually the chassis of the car. Any convenient location with good electrical contact (remove paint) may be used. near it using two screws supplied. When mounting in an automobile, place the bracket under the dash so the microphone is readily accessible. 6. Mount the microphone bracket on right side of the transceiver, or 5 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 10 Installation (Cont.) CB Antenna Since the maximum allowable power output of the transmitter is limited by the FCC, the antenna is one important factor affecting transmission distance. Only a properly matched antenna system will allow maximum power transfer from the 50-ohm transmission line to the radiating element. In mobile installations (cars, trucks, boats, etc.), an antenna system that is non-directional should be used. A vertically polarized, quarter-wavelength whip antenna provides the most reliable operation and greatest range. The shorter, loaded-type whip antennas are more attractive, compact and adequate for applications where the maximum possible distance is not required. Also, the loaded whips do not present the problems of height imposed by a full quarter-wavelength whip. Mobile whip antennas utilize the metal body of the vehicle as a ground plane. When mounted at a corner of the vehicle they are slightly directional, in the direction of the body of the vehicle. For all practical purposes, however, the radiation pattern is nondirectional. The slight directional characteristic will be observed only at extreme distances. A standard antenna connector (type SO-239) is provided on the transceiver for easy connection to a standard PL 259 cable termination. Cobra loadedtype antenna models ATW-500, AT-55, ATW-1000 and ATW-400 are highly recommended for most installations. Consult your Cobra dealer for further details. When installed in a boat, the transceiver will not operate at maximum efficiency without a ground plate, unless the vessel has a steel hull. Before installing the transceiver in a boat, consult your dealer for information regarding an adequate grounding system and prevention of electrolysis between fittings in the hull and water. 3-Way Combinations Antennas are available which allow operation of all three bands (AM-FM & CB), using a single antenna. However, use of this type of antenna usually results in less than normal transmit and receive range when compared to a standard-type "Single Band" antenna designed for CB only. 6 19.ULTRA.MANUAL.qx 9/15/97 4:09 PM Page 11 Installation(Cont.) Installation (Cont.) Ignition Noise Interference Use of a mobile receiver at low signal levels is normally limited by the presence of electrical noise. The primary source of noise in automobile installations is from the alternator and ignition system in the vehicle. Under most operating conditions, when signal level is adequate, the background noise does not present a serious problem. Also, when extremely low level signals are being received, the transceiver may be operated with vehicle engine turned off. The unit requires very little current an therefore will not significantly discharge the vehicle battery. Even though the COBRA radio has an automatic noise limiter, in some installations, ignition interference and other forms of automobile generated noise may be high enough to make good communications difficult. The electrical noise may come from several sources. Many possibilities exist and variations between vehicles require different solutions to reduce the noise. Consult your COBRA dealer or a 2-way radio technician for help in locating and correcting the source of severe noise. Base Station Operation (Operation from 120VAC, House Current) To operate your transceiver from your home or office, using the regular house current as the power source, you will require a 12VDC power pack that has been specially designed for the purpose. It is available as optional equipment from your COBRA dealer. It consists of a 120-volt, 60 Hz AC to 12-volt DC power converter with a 3A rating. Simply connect the red (+) and black (-) leads of the transceiver to the corresponding terminals of the power packs. DO NOT ATTEMPT TO OPERATE THIS TRANSCEIVER BY CONNECTING DIRECTLY TO 120 VAC. SERIOUS DAMAGE WILL RESULT. Temporary Mobile Operations To operate your CO ...