Related Manuals for Midland ALAN 8001S
Summary of Contents for Midland ALAN 8001S
- Page 1 ALAN 8001S...
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Page 2: Table Of Contents
TABLE OF CONTENTS Installation ........................2 Location ........................ 2 Mounting the Connection ..................... 2 Ignition Noise Interference .................... 2 Antenna ........................ 2 Tuning the Antenna for Optimum SWR ............... 3 External Speaker ...................... 4 Operation ........................4 Controls and Indicators .................... 4 Front Panel ........................4 Real Panel ........................6 P.T.T. Microphone ...................... 6 Operating Procedure to Receive ................. 6 Operating Procedure to Transmit ................ 6 Receiving SSB signals ....................7 Roger Beep . -
Page 3: Installation
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 inside the vehicle. In cars, the transceiver is usually mounted below the dash panel, with the microphone bracket beside it. MOUNTING THE CONNECTION The transceiver is supplied with a universal mounting bracket. When mounting the bracket and radio inside your car, make sure it is mechanically strong. Also provide a good electrical connection to the chassis of the vehicle. To mount the transceiver, proceed as follows: . After you have determined the most convenient location in your vehicle, hold the transceiver with mounting bracket in the exact location you have chosen. If nothing interferes with mounting it in the desired position, remove the mounting bolts. Before drilling the holes, make sure nothing will interfere with the installation of the mounting bolts. -
Page 4: Tuning The Antenna For Optimum Swr
direction of the body of the vehicle. For all pratical 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. If the transceiver is not mounted on a metal surface, it is necessary to run a separate ground wire from the unit to a good metal electrical ground in the vehicle. When installed in a boat, the transceiver will not operate at maximum efficiently 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. -
Page 5: External Speaker
EXTERNAL SPEAKER The external speaker jack (EXT. SPK.) on the rear panel is used for remote receiver monitoring. The external speaker should have 8 ohms impedance and be able to handle 4 watts at least. When the external speaker is plugged in, the internal speaker is disconnected. OPERATION CONTROLS AND INDICATORS There are 8 controls and 4 indicators on the front panel of your transceiver. FRONT PANEL 1. ON/OFF VOLUME (inner dual concentric). Turn clockwise to apply power to the unit and to set the desired listening level. During normal CB operation, the VOLUME control is used to adjust the output level obtained either at the transceiver speaker or the external speaker, if used. - Page 6 properly adjusted and matched to your transceiver. The built-in SWR (standing wave ratio) meter lets you easily measure your operating antenna conditions. To operate this function, connect your antenna to the output connector. Select a channel near the middle of the band such as 2 or the channel you plan to use most frequently. Set the 6 switch on the SWR position, and the 4 switch on the SWR CAL position. Press and hold the microphone push-to-talk button and using the SWR CAL control, adjust the meter indicator on the CAL position. Then, without releasing the P.T.T. button, set the 4 switch on the OFF position and read the SWR indicated. The number should be the ideal value. Generally speaking, readings up to 3 are acceptable, but over 3 indicates that you are losing radiated power and antenna adjustment may be necessary. 6. RF POWER CONTROL (outer dual concentric). This control enables you to adjust the RF output power continuously over the range of watt through 4 watts (SSB). 7. RX INDICATOR. This indicator will be illuminated when the unit has been set in RX mode. 8. TX INDICATOR. This indicator will be illuminated when the unit has been set in TX mode. 9. CHANNEL SELECTOR. This switch selects anyone of the forty Citizens Band channels desired. The selected channel appears on the LED readout directly above the Channel Selector knob.
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Page 7: Real Panel
REAR PANEL EXT.SP. - POWER+ 23. POWER SUPPLY. Accepts 3.8 VDC power cable with built-in fuse to be connected. 24. EXT SP. Accepts 4 to 8 ohm, 5 watt external speaker to be connected. When external speaker is connected to this jack, the built-in speaker is automatically disconnected. 25. ANTENNA. Accepts 50 ohm coaxial cable with a PL-259 type plug to be connected. PRESS-TO-TALK MICROPHONE The receiver and trasmitter are controlled by the press-to-talk switch on the microphone. Press the switch and the trasmitter is activated, release switch to receive. When transmitting, hold the microphone 0 cm from the mouth and speak clearly in a normal ‘’voice’’. The radios come complete with low-impedance (500 ohm) dynamic microphone. For installation instructions on other microphones, see the paragraph ‘’ALTERNATE MICROPHONES AND INSTALLATION”. -
Page 8: Receiving Ssb Signals
RECEIVING SSB SIGNALS There are four types of signals presently used for communications in the Citizens Band: FM, AM, USB, and LSB. When the MODE switch on your unit is placed in the AM position, only standard double-sideband and in FM position, only frequency deviation, full carrier signals will be detected. An SSB signal may be recognized while in the AM or FM mode by its characteristic ‘’Donald Duck’’ sound and the inability of the AM or FM detector to produce an intelligible output. The USB and LSB modes will detect upper sideband and lower sideband respectively, and standard AM signals. SSB reception differs from standard AM reception in that SSB receiver does not require a carrier or opposite sideband to produce an intelligible signal. A single-sideband transmitted signal consists only of the upper or the lower sideband and no carrier is transmitted. The elimination of the carrier from the AM signal helps to eliminate the biggest cause of whistles and tones heard on channels which make even moderately strong AM signals unreadable. Also, SSB takes only half of an AM channel, therefore two SSB conversations will fit into each channel, expanding the 40 AM channels to 80 SSB channels. The reduction in channel space required also helps in the receiver because only half of the noise and interference can be received with 00% of the SSB signal. -
Page 9: Roger Beep
ROGER BEEP When your transceiver is in normal operation, your radio automatically trasmits the audio signal at the end of your transmission. The listener can note easily that your transmission is over through the signal. Please note that this ROGER BEEP transmits 0.5-second at the moment PRESS-TO-TALK SWITCH KNOB is turned off. VOICE VOCE BEEP O.15 Sec PRESS TO TALK ON PRESS TO TALK OFF P.T.T. ATTIVO P.T.T. RILASCIATO Fig.. 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 microphones must be provided with a four-lead cable. The audio conductor and its shielded lead comprise two of the leads. The fourth lead is for receiving control, and third is for transmitting control. The microphone should provide the functions shown in the chart below. 4 WIRE MIC CABLE Pin Number Mic Cable Lead Audio Shield... - Page 10 If the microphone to be used is provided with pre-cut leads, they must be revised as follows. . Cut leads so that they extend 2 mm beyond the plastic insulating jacket of the microphone cable. 2. All leads should be cut to the same length. Strip the ends of each wire 3 mm and tin exposed wire. Before beginning the actual wiring read carefully the circuit and wiring information provided with the microphone you select. Use the mimimum head required in soldering the connections. Keep the exposed wire lengths to a minimum to avoid shorting when the microphone plug is reassembled.
- Page 11 Fig.4 Microphone plug pin numbers viewed from rear of pin receptacle. Be sure that the housing and the knurled ring of Fig. 3 are pushed back onto the microphone cable before starting to solder. If the washer is not captive to the pin receptacle body, make sure that it is placed on the threaded portion of the pin receptacle body before soldering. If the microphone jack is used to hold the pin receptacle during the soldering operation, best results are obtained when the connections to pin 1 and 3 are made first and then the connections to pins 2, 4. Use a minimum amount of solder and be careful to prevent excessive solder accumulation on pins, which could cause a short between the pin and the microphone plug housing. 6. When all soldering connections to the pins of the micro phone plug are complete, push the knurled ring and the housing forward and screw the housing onto the threaded portion of the pin receptacle body. Note the location of the screw clearance hole in the plug housing with respect to the threaded hole in the pin receptacle body. When the housing is completely threaded into the pin receptacle body, a final fraction of a turn...
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Page 12: Specifications
SPECIFICATIONS GENERAL Channels 40 CH/AM/FM/USB/LSB Frequency Range 26.965 ÷ 27.405 Frequency Control Phase Lock Loop (PLL) synthesizer Frequency Tolerance 0.005 Frequency Stability 0.00% Operating Temperature Range -0° C to + 55° C Microphone Plug-in dynamic with push-to-talk switch and coiled cord Input Voltage 3.8 V DC nominal, ± 0% Current consumption Transmitter: FM full mod., 4A -SSB PEP output, 4A Receiver: Squelched, 0.6A -Maximum audio output, .2A Size 6 cm (H) x 20 cm (W) x 23.5 cm(D) Weight 2.250 Kg Antenna Connector UHF, SO 239 Meter (3-in-) Illuminated; indicates relative output power, received signal strength and SWR. Duty cycle 5/5/90 TRANSMITTER Power Output SSB: 4 W - FM: 4W - AM: W...