User manual COBRA 2000GTL BASE STATION

[. . . ] REFER TO SERVICING TO QUALIFIED SERVICE PERSONNEL. Features -341 Operating Frequencies Allows operation on all available frequencies. 30 Watts Output Power Provides maximum power on AM and FM 100 PEP SSB. Dual Finals Provides steady output power. Dual Power Allows operation on Low and High power. [. . . ] Both controls increase frequency when turned clockwise and decrease it when turned counter-clockwise. --- 10 English Nothing comes close to a Cobra® 11 Your Mobile Radio Frequency · Your Mobile Radio Frequency · Frequency Three controls and one indicator are used together to set and display the radio frequency on which your mobile radio will receive and transmit signals. In this connection, it is important to understand the frequency bands built into the unit and the way they are displayed on the Dual 7 Segment Display. The 10 meter frequency range is broken down into four bands on your mobile radio. These are selected using the Band A / B / C / D knob. Band A B C D Frequency Range -- MHz 28. 000 ­ 28. 495 28. 500 ­ 28. 995 29. 000 ­ 29. 495 29. 500 ­ 29. 700 Frequency Frequency Display Receive and transmit frequencies are shown directly by the 6 digit numeric display in 100 Hz increments. -- Frequencies are also displayed on the Dual 7 Segment Display using a combination of numerical figures and decimal points. The figures indicate the first two values after the decimal point in the frequency, such as the 00 in 28. 005 MHz. The right hand decimal point in the display indicates whether the third value after the decimal point in the frequency is 0 or 5 -- if the right hand decimal is visible on the display, the third value is 5; if it is not visible, the third value is 0. The left hand decimal point in the display (between the two figures) indicates whether the two values before the decimal point in the frequency are 28 or 29 -- if the left hand decimal is visible on the display, the first two values are 29; if it is not visible, the first two values are 28. Refer to the examples in the following table. To substitute for the supplied low-impedance (500 ohm) dynamic microphone, see the alternate microphones and installation section on page 17. Operating to Transmit To transmit a signal: 1. Select the desired frequency for transmission if different from the one chosen to receive. Set the microphone gain knob fully clockwise. If the frequency is clear, depress the Press-To-Talk switch on the microphone and speak in a normal voice. · 14 English Nothing comes close to a Cobra® 15 Your Mobile Radio Maintenance and Government Regulatory Information · Your Mobile Radio Alternate Microphones and Installation · Maintenance 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. The microphone must be provided with a four-lead cable. The audio conductor and its shielded lead comprise two of the leads. The third lead is for receive control, the fourth is for transmit control. The microphone should provide the functions shown in the schematic below. -4 Wire Mic Cable Mic Cable Lead Grounding Audio Lead Transmit Control Receive Control The transceiver is specifically designed for the environment encountered in mobile installations. The use of all solid-state circuitry and its light weight result in high reliability. [. . . ] For warranty repair include some form of proof-of-purchase, such as a mechanical reproduction or carbon of a sales receipt. If you send the original receipt, it cannot be returned. Enclose a description of what is happening with the radio. Include a typed or clearly printed name and address of where the radio is to be returned. [. . . ]