DX 959 SOLID STATE CITIZENS BAND AM/SSB MOBILE TRANSCEIVER OWNER’S MANUAL Printed In Malaysia AT0949011A MIC980508
TABLE OF CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPECIFICATIONS 2 Installation Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mounting The Radio . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tuning The Antenna For Optimum SWR . . . . . . . . . . External Speaker . . . . .
IGNITION NOISE INTERFERENCE 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 automobiles, the transceiver is usually mounted the dash panel with the microphone bracket beside it. MOUNTING THE RADIO The transceiver is supplied with a universal mounting bracket.
TUNING THE ANTENNA FOR OPTIMUM S.W.R Since there is such a wide variety of base and mobile antennas, this section will strictly concern itself to the various types of mobile adjustable antennas. Because the antenna length is directly related to the channel frequency, it must be tuned to resonate optimally on all channels of the transceiver. Channel 1 requires a longer antenna than Channel 40 because it is a lower frequency. Due to the various methods of adjusting antennas for proper S.W.R.
4. RF GAIN CONTROL : This control is used to reduce the gain of the receive amplifier under strong signal conditions. OPERATION CONTROL FUNCTIONS FRONT PANEL 5. DIMMER CONTROL : This knob controls the level of brightness for the meter lamp, the frequency display and the channel display. Also, pushing this knob turns the meter lamp and the display LED's on and off. 6. RF POWER CONTROL : This control allows the user to adjust RF power output. 7.
13. PA/GNF/CB SWITCH : In the "PA" position, your voice will come out of the speaker that you need to plug in to the "PA. SP." jack on the back of the radio. The radio does not operate when you are in the "PA" mode. The "CB" mode is normal operation of the radio. In the "GNF" mode, you are in CB operation but the Galaxy Noise Filter (GNF) is engaged. This is a special noise filter that de-emphasizes audio high frequency response in order to increase the signal-to-noise ratio of weak signals.
FREQUENCY RANGE Channel PROCEDURE TO RECEIVE AND TRANSMIT Channel Frequency Channel Channel Frequency 1 26.965 MHz 21 27.215 MHz 2 26.975 MHz 22 27.225 MHz 3 26.985 MHz 23 27.255 MHz The receiver and transmitter are controlled by the push-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.
RECEIVING SSB SIGNALS There are three types of signals presently used for communications in the Citizens Band : AM, USB, LSB. When the MODE switch on your unit is placed in the AM position, only standard double-sideband, full carrier signals will be detected. An SSB signal may be recognized while in the AM mode by its characteristic "Donald Duck" sound and the inability of the detector to produce an intelligible output.
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 low output impedance characteristics. The microphones 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 transmit control and fourth is for receiving control.
If a vise or clamping tool is not available, the pin receptacle body can be held in a stationary position by inserting it into the microphone jack on the front panel. The numbers of the microphone plug are shown in Fig. 3, as viewed from the back of the plug. Before soldering the wire to the pins, pre-tin the wire receptacle of each pin of the plug. 8. Upon completion of the microphone plug wiring, connect and secure the microphone plug in the transceiver.
A FEW RULES THAT SHOULD BE OBEYED USE CH 9 FOR EMERGENCY MESSAGES ONLY 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. The FCC gives the following examples of permitted and prohibited types of communications for use in an emergency. These are guidelines and are not intended to be all inclusive. 2.
WARRANTY This radio is covered by a two year limited parts and labor warranty. • “Limited” means that we will repair problems caused by factory defects or normal use at no charge. • Before returning a radio to us for warranty service, please call our Service Department for a Repair Authorization Number (RAN). This RAN must be written below your return address on the outside of the shipping box.
