Introduction
1. Brief specifications and distinctive features
2. Main features and functions
3. Controls and display
4. Basic modes
5. Small LCD display
6. Installing the radio station in the car
7. Installing and configuring a car antenna
8. Rules for using the radio station
INTRODUCTION
Thank you for purchasing the MegaJet MJ-300 car radio. The MegaJet MJ-300 radio station is easy to use and will provide you with safe, efficient and reliable communication. Please read this manual carefully before using. The information provided here will help you get the best performance out of your radio.
The Megajet MJ-300 radio station belongs to the class of equipment available for civilian radio communications in the range.
1. SAFETY INFORMATION
The following precautions must be observed when operating, maintaining and repairing this device.
Repair and maintenance of the MegaJet MJ-300 radio should be carried out by qualified personnel in a specialized service.
Do not make any modifications to the radio!
Turn off the radio before entering an explosive or flammable area.
Do not use radios with a damaged antenna. If a damaged antenna touches parts of the body, there is a high chance of getting burned.
To avoid creating electromagnetic interference or compatibility issues, turn off the radio in areas where it is required, especially where there are information signs to remind you to do so.
Turn off your radio before entering a blasting area.
For vehicles with airbags: Do not place the radio in the airbag deployment area or directly on top of the airbag covers.
Functionality of radio station MegaJet MJ-300
Compact design
Microprocessor SAMSUNG 3P9228AZZ-QZR8
Separate frequency synthesizer on the LC7152N chip
Front panel with small LCD display
Increased power speaker (8 ohm, 3 W, square 76x76 mm)
Robust PTT with electret microphone
Scan Mode(SCAN)
Emergency tuning to channel 9 (CH9)
Ability to connect an external speaker
1. BRIEF TECHNICAL CHARACTERISTICS OF RADIO MEGADJET 300
..2. MAIN FEATURES AND FUNCTIONS
FUNCTIONS
- Two kinds
- Scan button SC
- Channel 9 emergency call (toggle)
- Button control of UP/DN channels
- Non-volatile settings memory
- Adjustable automatic noise reduction system
- Built-in input attenuator
CONTROL
- Volume control with power switch
- Squelch Threshold Control
- Channel up/down buttons
- Channel 9 emergency call button
- Channel scan button
LCD DISPLAY
- Display CHANNELS/GRID/SCAN
- Mode indication TX / SC / / L / H
3. CONTROLS AND DISPLAYS
Description of controls
1. 4-pin connector for connecting a PTT (headset)
2. Power on / Volume control VOL / OFF.
3. Threshold level control ..
4.LCD display. All current radio operating modes are displayed.
5. Button for selecting the type of modulation AM / FM (AM / FM).
6. SC scan button. This button can be used to search for a channel with heavy traffic. After pressing this button, the channels are scanned up. When a signal is found, scanning will be paused. After stopping reception, scanning resumes after 10 seconds. Clicking on transmit will stop scanning.
7. Button to quickly switch to the emergency call channel CH9 / switch. This button is designed to quickly switch to the 9th channel in case of an emergency. If the radio is in multi-grid mode, this button switches grids. When pressed for a long time (more than 1 second), the built-in attenuator is turned on to attenuate the received signal. In this case, the symbols "Lo" will be displayed on the screen. When you hold the CH9 button again, the mode is turned off, and the symbols “Lf” will be displayed on the screen.
8. Up channel switch button
9. Channel down button DN
Description of connectors on the back of the radio
SC - Scan. The indication of the sign “SC” means that the receiver is in the automatic scanning mode. To use this function, turn on the power of the radio and set the desired volume. Adjust noise reduction. Press the "SC" button and scanning will start. “SC” will appear on the LCD. When a channel is detected, the signal in which exceeds the squelch level, scanning stops and resumes again after the signal disappears, until the PTT or the “SC” button is pressed.
M,L,H – in multi-grid mode, indicates grids C, B, D, respectively.
5 - indicates the inclusion of the frequency shift mode by -5 kHz (Russian standard)
6. INSTALLING THE RADIO IN THE CAR
The MegaJet MJ-300 radio is designed for use in vehicles with a 12-volt battery and a grounded minus. should be sufficient both to power the radio station, and for the needs of automotive electricians.
Before installing the radio, check that your vehicle meets this requirement.
A mounting bracket and a microphone holder are designed to mount the radio in a car.
INSTALLATION LOCATION OF CB RADIO STATION
The radio station is installed in the car in such a place that its use does not create inconvenience and does not distract the driver from driving. The best place for this purpose is under the dashboard of the car.
Attention: Make sure that when choosing a location for the installation of the radio station, it does not interfere with the driver and does not impair access to the vehicle controls. Observe the safety requirements when laying connecting cables. If the radio or connecting cables are in an awkward position, you may lose control of your vehicle.
.....MECHANICAL WORK DURING INSTALLATION.
Step 1. Being careful, use the mounting bracket as a template to mark the mounting holes under the dashboard. To mark the drilling locations, use an awl or other sharp tool designed for marking on metal.
Step 2: Drill two 3mm holes for each mounting plate mounting screw. Secure the bracket under the dashboard with the provided self-tapping screws (See Fig. 1). Be especially careful when drilling holes so as not to damage the wiring harnesses and electronic devices located under the panel.
Fig.1. Mounting the radio with a mounting bracket.
RADIO INSTALLATION.
Step 1. Insert the radio into the mounting bracket until it aligns with the tabs (see Figure 2). Set the optimal angle of the radio body for easy access.
Step 2: Attach the radio's latches, making sure there is room for connecting external cables to the back of the radio.
Rice. 2. Mounting the radio station with clamps.
INSTALLING THE MICROPHONE HOLDER.
Drill two holes near the radio on the car dashboard to install the microphone bracket. Secure the holder with two 10mm self-tapping screws from the kit to the radio.
CONNECTING AN EXTERNAL SPEAKER (not included).
On the rear wall of the radio station there is a socket for connecting an external speaker "EXT-SP". Insert the plug from the external speaker into it. The built-in speaker is turned off.
POWER CONNECTION.
Since the MegaJet MJ-300 radio station is equipped with a power filter to eliminate interference from the engine ignition system, you can connect it to the car's on-board network at any point. To reduce interference, it is better to use a wire in the form of a twisted pair.
Step 1: Disconnect the power cables from the battery terminals to prevent short circuits that may occur when powering up the radio.
Step 2: Securely connect the black “negative” wire from the radio directly to the vehicle body. For best performance, your radio requires good metal-to-body contact.
Step 3. Connect the red “positive” wire from the radio with built-in fuse holder to the fuse box (“cigarette lighter” or directly to the positive battery terminal). The fuse block is usually the most convenient point for connecting the radio. You can connect the power cable to the ignition switch contacts, in which case the radio will turn off automatically when the ignition is turned off, which will prevent accidental battery discharge.
Step 4: Reconnect the power cables to the battery terminals. Connect the power cord plug to the radio cable connector.
7. INSTALLATION AND SETUP OF THE VEHICLE ANTENNA
In general, there are two types of antennas for mobile CB radios - a full-size 1/4-wave whip (2.75 m) and a shortened matched whip antenna (from 0.5 to 1.9 m). Due to the large length of full-size antennas, on vehicles, mainly shortened antennas are used in various designs with mounting through a hole in the roof, on a bracket for a drain flanging or on a magnetic base (see Fig. 3).
Rice. 3. Typical installation locations for car antennas.
Magnetic base antennas have the advantage of being easy to stow inside the car when parked, and the strength of the magnet keeps the car secure when shaking and driving at high speeds.
The antenna pattern depends on the location of the antenna. When installing the antenna in the middle of the roof, the radiation pattern approaches circular. If the antenna is installed on the right edge of the roof, then its maximum gain will be directed to the left of the vehicle axis. When placing the antenna on the rear trunk, its diagram will be directed forward.
On fig. Figure 3 shows five typical car antenna installation locations: (1) rear bumper, (2) back cover trunk, (3) flanging for water drainage, (4) hood, (5) roof.
For qualified advice on choosing the type of antenna and its installation location, contact your sales company.
Installed car antenna should be tuned to resonance at the mid frequency. To tune and periodically monitor the antenna and antenna cable, a meter is used, which is connected to the circuit between the radio station and the antenna cable using a separate cable adapter of minimum length. Various types of antennas are configurable different ways so please read the manual. As a rule, tuning an antenna that has a reliable galvanic (or capacitive - through the entire area of the magnet) contact with a conductive underlying surface (the area of the roof of the cabin) at the location point is carried out by reducing or increasing the length of the pin. Try to achieve a minimum SWR (one ideally) in the middle of your chosen frequency section (for example, between the two most frequently used channels). And if at the same time at the edges of the “working” range you can get an SWR of no more than 1.5, then your choice of channels is correct and the antenna is tuned perfectly.
Carefully follow the antenna manufacturer's installation instructions.
Attention! Never turn on the radio station for transmission, even for a short time, with an untuned antenna or an “out of tune” antenna, when the reliable electrical contact of the cable sheath and the “mass” of the antenna with the conductive underlying surface at the antenna location is lost. This can lead to damage to the radio and electrical equipment of your car!
8. TERMS OF USE OF THE RADIO STATION
- Turn on the radio by turning the “VOL/OFF” knob clockwise. Set the desired sound volume.
- Adjust the squelch threshold with the “SQ” control as instructed in this manual.
- Select the desired channel using the UP/DN channel buttons.
Note: If no channel hopping is in progress, please note that emergency channel mode may be enabled. This mode is deactivated by pressing the emergency button CH9 “Channel 9”.
TRANSFER MODE.
Press and hold the “PTT” switch on the microphone body. Hold the microphone body at a distance of 5 cm from your mouth and speak in a normal intelligible voice.
RECEIVE MODE.
Just release the PTT and listen to your correspondent, using the volume and squelch controls to achieve the best sound quality.
Megajet car radios belong to common civilian radios that use a frequency in the region of 27 MHz for communication.
For work on the territory of the Russian Federation owners of Megajet radios you do not need to obtain permission to use the frequency. You just need to pass special radio registration procedure and you can communicate (receive and send messages) for an unlimited amount of time completely free of charge.
Radio stations of Korean origin Megajet(Megajet) are specially adapted to Russian conditions and are very popular with truckers, taxi workers, cargo and passenger carriers, ordinary motorists, etc. After all, Russian scientists and specialists also take part in the development of radios. Inexpensive and reliable Megajet products is the most sought after on the market of CB radios.
The main criteria that you need to pay attention to when choosing a radio station are power, sensitivity, range, convenience and ease of use, compact size and operational reliability. Usually, car and stationary radios differ from portable ones in the greatest power.
So, Megajet car radios are characterized by high power, reliable and durable housing, modern design. and have up to 40 memory channels and an input power of 4 and 10 W, respectively, are most often used by truckers to listen to the 15th channel (truckers' channel) and exchange information with other radio stations of the 27th band. The radio system is based on the modern SAMSUNG 3P9228AZZ-QZR8 processor. Radio MegaJet MJ-300 It is also effectively used in the city, where it is enough to have only a few communication channels.
Another model trademark MegaJe t - with a power of 8 W operates on 120 channels. It differs from previous models in that it is possible to work both in Russia and in European countries. Motorists will be pleasantly surprised by the low price, as well as a multifunctional LCD display that displays all the necessary information (frequency, channel number, etc.).
We offer efficient and reliable Megajet car radios at competitive prices. The radios of this brand have established themselves as a reliable and proven solution with the best combination of price and quality. Today the Megajet MJ radio station is the best choice for truckers and taxi drivers, as well as for organizing radio communications on any automobile vehicles.
Walkie-talkies Mj operate in the traditional CB band for motorists, in the "trucker frequencies" band 25.615 - 28.305 MHz.
Technical advantages of Megajet car radios
- Megajet radios are equipped with a discrete frequency synthesizer with digital control, therefore, excellent stability of the frequency characteristics of the transmitter is ensured.
- The devices are equipped with powerful and productive processors that provide fast and comfortable work without "freezes" and failures.
- The radio stations are adapted for use in several frequency grids, including both Russian and European MW frequencies, which allows you to use communication equally effectively both in Russia and abroad, tuning into the desired channel and the desired frequency grid.
- Any Megajet car radio is a reliable device, the design of which is adapted for operation in extreme conditions. The robust case, as well as the high-quality assembly of the radio station and the soldering of the board, make it possible to effectively use the station in any situation.
- Improved security toolkit, quick set to "9 channel" used for emergency calls.
Popular Megajet models and their features
Before you buy a Megajet radio station, you should pay attention to the most popular models that deserve the best reviews from professionals.
- The Megajet 300 radio is the undisputed leader in the rating of motorists, as it is the most affordable and effective solution to the radio communication problem. It is profitable to buy Megajet 300 both when it is necessary to equip a column of cars with radio communication, and for tourist and amateur radio purposes. The radio has simple manual control and reliable electronics based on the LC7152N frequency synthesizer. The maximum transmitter power is 8 W, which is quite enough to coordinate a convoy or several tourist cars.
- The Megajet 555 radio is a device that has earned its popularity with its original form factor. A very small body and a multifunctional tangent, on which all the controls are placed, de facto turn the product into an analogue of a "walkie-talkie", which is convenient to hold in your hands, the working module does not take up much space. Megajet 555 is popular thanks to quite high power transmitter up to 10 W, as well as versatility: it supports up to 240 channels on the Russian and European frequency grid.
- The Megajet MJ 600 radio is one of the most functional and advanced radios, the main advantage of which is a powerful processor from SAMSUNG, which makes the device work quickly and smoothly. The radio has intelligent noise reduction functions, convenient control and transmitter power up to 10 watts. The radio operates in the standard MW frequency range, both in the Russian and in the European grid. Another important advantage is that the Megajet 600 radio has a built-in non-volatile memory for storing settings, which ensures careful storage of all user parameters.
Despite the fact that the 555 radio is the most popular, more advanced models are also in demand among motorists, for example - Megajet 650.
Megajet radio station at the best price in Moscow and Russia
We present popular models MJ 555,, and others, at the most attractive prices. If you need to buy a Megajet radio, we are ready to offer the lowest achievable price in the current market situation, as well as a product warranty. Therefore, buying a Megajet from us is the best solution for both professionals and radio amateurs.
Radio station MegaJet MJ-200
Automotive walkie-talkie MJ-200 continues the line of inexpensive Megajets. The walkie-talkie MegaJet MJ-200 is an analogue of the walkie-talkieYosan JC-200 .
Megajet 200 has a peculiar design. In the middle of the front panel is an LCD display, and to the right and left of it vertically in a row are the function switching buttons. On the right is a combined volume/on switch (VR) and manual squelch (SQ). Using the functions, you can switch the type of modulation (A / F), start the scan mode (SC), go to channel 9 in an emergency (CH9), turn on the input signal attenuator (CH9), switch the channel number (UP, DN) or turn on the listen in turn mode two channels (DW). In general, the MJ-200 radio station has all the minimum of useful functions. The buttons are white backlit.
The MJ-200 radio receiver is a double frequency superheterodyne. The transmitter of the radio station has a frequency synthesizer with quartz stabilization.
The main features and functions of the radio Megajet 200:
- AM/FM mode switching
- Channel 9 emergency call (grid switching)
- Button control of UP/DN channels
- Frequency shift function -5 kHz
- Threshold noise reduction system
- Built-in input attenuator
- Grid mode
- Dual channel listening mode
- Non-volatile memory of the last used channel
- Volume control with power switch, dual with squelch control
- Buttons for switching operating modes
- Channel buttons Up/Down
- Display CHANNELS/GRID/SCAN
- Mode indication TX / FM /AM / L / M / H
Technical characteristics of radio station MJ-200:
Frequency range, MHz: 25.965…27.405
Number of channels: 40/120
Receiver sensitivity, µV
(12 dB S/W FM, 10 dB S/W AM) 0.3/0.5
Transmitter output power, W: 8
Type of modulation: AM(90%)/FM(2KHz)
Supply voltage, V: 13.8
Maximum current consumption, A: 2.0 max.
Dimensions, mm: 138(w) x 40(h) x 125(d)
Weight: 0.6 kg, total 1.0 kg
As can be seen from the characteristics, they are exactly the same as those of the radioMJ-100 .
In order to switch the MegaJet 200 radio to multi-grid mode, hold down the A/F button and turn on the radio with the VR knob. The screen will display the symbol "M", which corresponds to the grid "C" and means the transition to 120-channel mode. Switching between grids is done by pressing the CH9 button. The symbol "L" corresponds to the grid "B", the symbol "H" corresponds to the grid "E".
To switch the MegaJet MJ-200 radio from the European to the Russian/Polish grid, hold down the A/F and CH9 buttons and turn on the radio with the VR knob. In this case, the symbol “5” will be displayed on the screen. To return to the normal mode, you need to repeat the specified operation.
The RESET CPU mode is used to clear the processor memory and restore factory settings.
For full reset it is necessary to hold down the CH9 button to turn on the radio station with the VR knob. In this case, the screen will display the inscription "rS" and the station will return to the factory settings.
Radio Megajet - one of the brightest brands in the MW-range equipment market. On the domestic market radio stations have been presented for a very long time and have found well-deserved recognition from users. In a large range walkie-talkies Megajet, prices which will suit any buyer, you can choose a transceiver that will suit any, even the most demanding user, as much as possible.
Radio Megajet: quality, comfort, affordability.
radio stationsMegajet, specially oriented for Russian conditions. In addition to reliability, it is worth noting the excellent ergonomics inherent in all models of this brand. Walkie-talkies Megajet buy, which you can with us, are a popular and promising brand in the Russian market, for the past 25 years.
Advantagesradios Megajet and prices beneficial to the buyer:
- Radio stations have proven themselves excellently in different climatic conditions.
- Due to the use of high-quality element base (for example, processors in many models of radio stations are used by Samsung), these walkie-talkies easily endure long trips and intensive use.
- Megajet is up to 450 channels in foreign and Russian frequency grids. Now the driver does not need to constantly reconfigure channels or look for free frequencies. Non-volatile memory allows you to save all settings when the radio is turned off from power, and models with memory cells allow you to record and save the channels you need. Most models have built-in automatic noise reduction function, which allows you to use more comfortably. radio stationMegajet.
- Considering all consumer categories with different price ranges, the company produces devices with different types of transceivers. Even the most inexpensive model will have more advanced technical characteristics in comparison with many similar models from other manufacturers.