With the rapid development of mobile communication networks, network coverage is growing, but because of a variety of building, developing road traffic, so that indoor wireless communications there are still some weak links can not meet the needs of customers, mainly the following problems,
1. blind spot: the signal after the loss is less than the phone receiver sensitivity, resulting in poor cell phone.
2. Weak: The main signal is lower than after the loss of the phone receiver sensitivity, resulting in poor cell phone.
3. conflict zones: mainly high-rise building area wireless signals from a plurality of cells, and more for the floor, wall instability reflected signal, resulting in frequent switching (ie ping-pong effect), seriously affecting the normal communication handset.
4. Busy area: mainly large traffic areas, station capacity is difficult to meet the communication needs of the user can not access the mobile network for communication.
For the above problem, by an increase in the base station or stations placed directly strengthen coverage can be solved, but the project is more complex and consumes a huge cost. How to improve the coverage in order to achieve seamless indoor network coverage, improve call quality, but also to maximize the reduction of costs is an important issue for network optimization.Signal amplifier and thus ushered in the era of the shield!
Features of cell phone jammer
1. Only shields mobile phone signals do not affect the normal operation of other electronic devices
2. Only shields mobile phone signals inside the examination room, examination room outside of the phone is not interference, but does not interfere with the base station
3. Only shielded transmission base station downlink frequency without affecting the uplink frequency
4. Green environmental protection, electromagnetic field strength is far below the national standard, without any effect on the human body
5. Operation is simple and correct installation of the antenna, connect the power to run automatically
cell phone repeater is this:
cell phone repeater is buffered into the secondary amplifier stage of the programmable gain amplifier PGA, by filtering the signal after amplification with the most flat frequency response characteristics of the filter is 8-order low-pass filter, which can be programmed setting the cutoff frequency from 10Hz to 100KHz, secondary filter second-order active low-pass filter to eliminate interference digital, low-pass filtering plus optional secondary band-pass filter, whose lower cut-off frequency of the use of pull switch settings , low-pass and band-pass filter can be programmed to access or skip.
The lighting fixture of LED structure simple and elegant designed, which used aluminum profiles made of one-piece greatly reduce the weight. Two sets of installation provide customer convenience, improve light utilization, very practical, truly Tri-Proof.
There are waterproof and dustproof drop resistance against pressure and even moisture corrosion, using a very wide range. Get all customers' recognition and acceptance.
Tri-proof led light means: waterproof, dustproof, anti-corrosion these three. Oxidation using special anti-corrosion materials and silicone seals to achieve the lamp protection requirements. This light circuit control board corrosion, water, oxidation treatment, for electrical boxes sealed cooling capacity is weak features, intelligent temperature three anti-lightstri-proof led light for operation of the circuit, reducing the power converter operating temperatures, strong electrical isolation protection on the road, double insulated connectors ensure the safe and reliable line. According to the actual working environment of the three anti-lamp, lamp protection box for surface nano-spray corrosion proof treatment to prevent dust and moisture from entering.
instructions of waterproof led par light
1, LED Par can be installed in any position, and the distance between the light and the person or others should be more than one meter, please make sure to lock the light should be made to foot
Enough safety precautions.
2.Make certain voltage and frequency to adapt to the power supply and in the right light, and then open it.
Maintenance Make sure the power is off, if you want to open or maintain a dry light.Keep light, the light output will remain, if you regularly clean
The light can also be extended using the specialized glass cleaning fluid cleaning it.Don 'T use alcohol or chemical liquids to clean it, and please clean the inside of the vacuum cleaner light at least once a year.
WARNING Be careful installation.
Do not use this product near water or other liquids.
Do not install in high temperature environment, the distance between the lamp and other objects should be at least 0.5 meters.
Do not look directly at the light, otherwise it will damage your eyes.
Before opening the maintenance lamp, must confirm that the power has been cut off.
The light emitting diode damaged, it must be professional and technical personnel maintenance.
Our high quality neodymium magnets, with varying grades up to N52 and AH series, can be customized into a wide range of shapes and sizes with precise tolerances. Multiple choices of coatings and magnetization orientations can meet specific customer requirements.
The Grade of a magnet generally indicates how “strong” a magnet material is, which is measured by the Maximum Energy Product. The energy product is commonly specified in units of Gauss Oersted. The higher the grade the “stronger” the magnet. The grade also tells the temperature rating of a magnet material. Neodymium magnets have different heat tolerances which determine their maximum working temperature. As the heat tolerance increase the maximum available flux density decreases.
Neodymium magnets can be dangerous, as they generate extremely strong pull forces, therefore must be handled with care to avoid personal injury and damage to the magnets. Fingers and other body parts can get severely pinched between two attracting magnets. Neodymium magnets are brittle, and can shatter if allowed to slam together, launching small pieces at great speeds. Eye protection should be worn when handling there magnets.The strong magnetic fields of neodymium magnets can also damage electronic appliances and magnetic media, as well as affect the operation of medical devices. Never place neodymium magnets near television, VCRs, computers, credit cards, magnetic I.D.cards, video tapes, pacemakers and etc.We provide safe and timely shipping by air and by sea through Fedex, UPS, DHL and TNT. Tracking information is available. Your appointed forwarder is also welcome.
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