Blog

1.Basic Repeater System Installation

 Your system should come with at least the following items:

2.In-Building Booster Installtion Sloution

 Above diagram illustrates how a repeater extends signal coverage to every corner of the building. The exterior yagi donor antenna placed outside of the building where it has easy access to a BTS. Signals from the donor BTS are then introduced into the repeater. After amplification by the repeater, signals are divided into several parts by splitters or couplers and sent to the interior service antennas. The service antennas are placed inside the building where it can extend radio coverage to the dead zones. Therefore, the subscribers have seamless access to mobile signal from every corner of the building. Through a high-tech, reliable repeater made by Remotek and the applicable system design, the QoS for applications like voice call, video call, video streaming, and data services will be guaranteed to each customer.

3.High-Rise Building Booster Installation

The diagram illustrates signal coverage extension for a high-rise building. Suppose the facility has 13 levels, 11 floors and 2 basements. For example of a scenario, Floors 9th to 13th level suffering the " Ping Pong Effect " . The first to 8th level will be the " signal fades " areas. The basement and inside the elevator are " dead spot " which can not access any signal from base stations. A way of solving this problem is to install a micro base station, a cable booster and indoors distributed antennas to extend the coverage of mobile signal within this kind of large building. Users will see a noticeable increase in the range of their mobile networks as the repeater is indeed putting out a stronger signal.

 4.Mountains Repeater Installation

When coverage extension becomes difficult due to hills and mountains preventing line-of-sight with the BTS location, using a RF or fiber optical repeater to enhance signal coverage provides an ideal solution. Deployment of repeaters can minimize the rollout time and site acquisition is much easier approved.

Above diagram provides a typical installation layout of an outdoor project. The repeater is connected via coaxial cables to donor and service antennas. Ideally to maximize the output  power of the repeater, donor and service antennas should be installed on opposite sides of     the mountain to take advantage of mountain as an isolation barrier

5.Tunnels and Subways Installtion

Delivering a reliable and seamless mobile communications for underground subway and tunnels presents operators with many challenges due to the limitation of RF propagation and penetration. For the most part subscribers in these areas are unable to receive mobile signals to establish a call connection. In order to provide coverage to these areas, a cost effective and reliable solution may come from a RF or fiber optical repeater.

Deployment example 1:A 4km tunnel is served with two 5W repeaters.
As the diagram illustrates, donor antennas are located on both ends of the tunnel. Signals received from the BTS are amplified and then projected into the tunnel through the service antenna, providing coverage to the length of the tunnel.

Deployment example 2: Fiber Optical Repeater with micro-cell

Solution to provide coverage to underground sub-ways, a mix of micro-cell and fiber optical repeater will enable an operator to provide full coverage to the underground subway network.

With the fiber optical repeaters, consisting of a master and a remote unit, signal is tapped from the micro-cell, where the master unit will convert to an optical signal for transport down the fiber cable to the remote unit; in turn the remote unit will re-convert the optical signal back to RF signal and boost the signal for distribution via antennas or leaky cables providing further coverage in the subway.

6.Highway Repeater Installation

Highways provide a good example where deployment of new BTS' s is not only cost ineffective but under utilization of BTS capacity. In most practical situations providing coverage to highways provides convenience and for emergency purposes, but BTS capacities along highways are extremely under utilized. Also with growing intolerance from subscribers to call drops, operators are force to provide coverage along the full stretch of the highway.

The diagram illustrates a simple deployment of a repeater to extend coverage to a road around a mountain. Highways tend to be long winding roads obstructed by hills in between, leaving blinds spots where the BTS signals can not reach. Installing a repeater will provide coverage into this area, without a repeater to extend coverage; mobiles traveling around the hill will result in a call drop.

7.

Tired of poor reception on your mobile phone? Troubled by intermittent communication during your call?This device,Mobile Signal Booster,now can remove all these troubles.

What is Mobile Signal Booster? 

  Mobile Signal Booster,also called Indoor Repeater,Signal Amplifier,is a device used to increase the signal 

strength of your mobile phone connections to BTS,reduce dropped calls and even help you to extend your 

cellphone range.It can increase the signal strength of your mobile by up to 500%.
 

Application situations 

  Mobile Signal Booster is specially designed for the “blind zones” of offices, family rooms, underground 

parking garage, cars, lifts, elevators, factories, bars,supermarkets, mountain areas,marines, deserts, 

high ways,tunnels,etc, where the signal is very poor. Or in spite of full bar signals on the mobile phone, 

there is a break in voice leading to call clarity problem. Simply place the mobile phone booster in such 

places, you'll be astonished with the huge gain in both the incoming reception and outgoing transmission 

levels as the mobile signal booster goes to work!
 

Applicable Mobile Network 

Mobile Signal Booster is applicable for  

3G   (Uplink 1920~ 1980 MHz,Downlink 2110~ 2170 MHz),

GSM  (Uplink 890 ~ 915 MHz,Downlink 935 ~ 960 MHz),

DCS  (Uplink 1710~ 1785 MHz,Downlink 1805~ 1880 MHz),

CDMA  (Uplink 825~ 835 MHz,Downlink 870 ~ 880 MHz), 

PCS  (Uplink 1850~ 1910MHz, Downlink 1930~ 1990 MHz)

mobile network.General,it is applicable for most countries'mobile network.Your OEM and ODM 

are available.

Complete package booster consists of 
 1.One Outdoor antenna.(Yagi Antenna , Directional Outdoor Penal Antenna) 
 2.One Indoor antenna.(Omni Inhale Top Antenna , Directional Indoor Penal Antenna , Whip antenna)    
 3.Low loss coaxial cable with connectors.                                                                 

 4.Mobile signal booster. 
  5.Power supplier.

Improving Long Distance Calls 

  Cell phone boosters help us to achieve long distance and more reliable communications. The antennas 

with the magnetic mount or the glass mount can be used in the car as well as in boats and trucks. The 

indoor cell phone coverage can also be increased to cover an area of 2500 square feet. 

  The booster is also used to enhance wireless applications such as cell phone internet use as well 

as text messaging. 

Dual Band Cell Phone Boosters 

   Whether you use your cell phone for business or just social communication at home, a booster is very 

necessary. With a booster you will never have to lose signal in places or environments which are very 

important for communication. 

   There are dual band cell phone signal boosters available for use with a dual band phones. There is 

also the wireless extender system cell phone signal booster that is capable of improving the signal strength 

of the PCS phone through signal amplification up to an area of 2500 square feet. 

   In case you need additional coverage, you can simply introduce a wireless extender PCS indoor antenna 

which is sold separately. You can place the antenna on the roof and then run the RG6 coaxial cable to your 

room where you will place the base. Once it is connected there will surely be fewer dropped calls. The signal 

booster can also be used for other wireless applications, as well as cell phone internet use and messaging 

through PDA. The signal booster is easy to install,detailed install infomation,please check

http://www.dzxcon.com/products.asp?id=26&bigclass=Installation%20Sloution

Reasons for weak signal

Rural areas
  In many rural areas the housing density is too low to make construction of a newbase station commercially 

viable. In these cases it is unlikely that the service provider will do anything to improve reception, due to the 

high cost of erecting a new tower. As a result, the only way to obtain strong cell phone signal in these areas 

is usually to install a home cellular repeater. In flat rural areas the signal is unlikely to suffer frommultipath 

interference, so will just be heavily attenuated by the distance. In these cases the installation of a cellular 

repeater will generally massively increase signal strength just due to the amplifier, even a great distance 

from the broadcast towers.

Building construction material
  Some construction materials very rapidly attenuatecell phone signal strength. Older buildings, such as 

churches, which use lead in their roofing material will very effectively block any signal. Any building which 

has a significant thickness of concrete or amount of metal used in its production will attenuate the signal. 

  Concrete floors are often poured onto a metal pan which completely blocks most radio signals. Some 

solid foam insulation and some fiberglass insulation used in roofs or exterior walls has foil backing, which 

can reduce transmittance. Energy efficient windows and metal window screens are also very effective at 

blocking radio signals. Some materials have peaks in theirabsorption spectra which massively decrease 

signal strength.

Building size
  Large buildings, such as warehouses, hospitals and factories, often have no cellular reception further than 

a few meters from the outside wall. Low signal strength is also often the case in underground areas such as 

basements and in shops and restaurants located towards the centre ofshopping malls. This is caused by both 

the fact that the signal.

Multipath interference
   Even in urban areas which usually have strong cellular signals throughout,there are oftendead zones caused by destructive interference of waves which have taken different paths (caused by the signal bouncing off buildings etc.). 

These usually have an area of a few blocks and will usually only affect one of the two frequency ranges used by cell 

phones. This is because the different wavelengths of the different frequencies interfere destructively at different 

points.Directional antennas are very helpful at overcoming this since they can be placed at points ofconstructive 

interference and aligned so as not to receive the destructive signal.

Diffraction and general attenuation 

  The longerwavelengths have the advantage of being able to diffract to a greater degree so are less reliant on line 

of sight to obtain a good signal, but still attenuate significantly. Because the frequencies whichcell phones use are 

too high to reflect off the ionosphere asshortwave radio waves do, cell phone waves cannot travel via the ionosphere.

Where our cell phone signal booster can be used?

Different parameters of the laser, the application of different emphasis, according to a common purpose, for the laser choose to do an introduction, hoping to facilitate customer purchase:
1,A close-range red dot laser modules, generally used within a distance of 3 meters, a pupil diameter of 3-5mm beam between the supply voltage 3-5V, or AC-powered, spot size can be within 1mm-2mm , the structure is small, can be used for optical path adjustment, close location, etc.;
2, close the word-linered laser modules, within 3 meters, a pupil diameter of the beam 3-5mm, supply voltage 3-5V, or AC-powered, according to the different lines from a slightly different thickness, 3 m focusing, line width 2mm less than one meter at focusing, line width 0.5mm or less, can be used to mark location, such as stone cutting position, timber cutting location;
3, light intensity red uniform word-line modules, the word length distribution of the direction of the line brightness uniformity of better than ordinary, the light detector to receive, then the corresponding uniformity better;
4, the word width adjustable red linear laser modules used within 5 meters, you can adjust the distance depending on the use of line width;
5, collimated laser beam expander, a pupil diameter of 10mm, 20mm, 30mm-50mm, a better uniformity of energy distribution of spots, spot round, good alignment can be used for long-distance point, location, distance of up to several hundred meters, or even 1000 meters, can also be a close parallel light generator;
6, close green dot laser modules, distance is 5 meters, the exit pupil spot 1mm, very close at a small spot, mode is good, close to the base transverse mode can be used to identify, locate, laser pointer, instructions ;
7, high-power desktop laser wavelengths are 532nm, 473nm, 457nm, 671nm, 1064nm, these types of solid-state lasers, 635nm, 650nm such as semiconductor lasers, big power, can be used for high-power experiments, laser show systems, laser landmarks, etc..
8, infrared-ray laser modules can be used to detect simulated life-CS equipment;
9, infrared lighting system, big power, can be used for long-range night-time monitoring;
10, high-power laser flashlight, portable, power high, irradiation distance, only for exploration, mountain climbing and other enthusiasts.

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What is Noise?
Did you know that a cell tower actually creates noise on the network and that this noise is actually needed? Networks have an accepted value of approximately -121dBm that is factored into its design and algorhythms. This is called the noise floor. When, for example, you are on a phone call and you are the one speaking, if you hear ABSOLUTE silence in the ear piece, you will think the call was dropped. But under normal operation, there is a certain noise level that is needed to let you know that call is still active. However, what needs to be kept in check is the amount of noise in relation to the usable signal, better known as, signal to noise ratio. (SNR) This is where high quality filters and advanced engineering techniques come into play with our products.

Can you explain VSWR in detail?
VSWR (Voltage Standing Wave Ratio or, occasionally referred to as Vertical Standing Wave Ratio), is a measure of how efficiently radio-frequency power is transmitted from a power source, through a transmission line, into a load (for example, from a power amplifier through a transmission line, to an antenna).

In an ideal system, 100% of the energy is transmitted. This requires an exact match between the source impedance (50 ohm), the characteristic impedance of the transmission line and all its connectors, and the load's impedance. The signal's AC voltage will be the same from end to end since it runs through without interference.

In real systems, mismatched impedances cause some of the power to be reflected back toward the source (like an echo). Reflections cause destructive interference, leading to peaks and valleys in the voltage at various times and distances along the line.

VSWR measures these voltage variances. It is the ratio of the highest voltage anywhere along the transmission line to the lowest. Since the voltage doesn't vary in an ideal system, its VSWR is 1:1. When reflections occur, the voltages vary and VSWR is higher. (For example -- 1.2:1 or 2:1)

Mathematically:

VSWR is the voltage ratio of the signal on the transmission line:
VSWR = |V(max)| / |V(min)|

Where V (max) is the maximum voltage of the signal along the line, and V (min) is the minimum voltage along the line.

It can also be derived from the impedances:
VSWR = (1+r) / (1-r)

Where r(gamma) is the voltage reflection coefficient near the load, derived from the load impedance (ZL) and the source impedance (Zo):

= (ZL-Zo) / (ZL+Zo)
If the load and transmission line are matched, r= 0, and VSWR = 1:1
dreamhost code

What’s the difference between a Booster and a Repeater?
A Booster is designed for hardwired applications, while a repeater is designed to provide wireless coverage to a specified area. Therefore, a repeater is better suited where multiple phones need improved coverage or if a user prefers wireless coverage as opposed to the tethered setup of a booster.
What technology do the JDTECK Boosters support?
JDTECK’s Boosters supports all technologies or protocols in the frequency band the booster is compatible with. These include GSM, DCS, CDMA, PCS, WCDMA, CDMA2000, HSDPA, HSUPA, EV-DO, EDGE, and GPRS to name a few.
Can the JDTECK Booster Kit also be used in homes and offices?
Yes! The JDTECK Signal Booster can be used anywhere you can provide it a power source.
What is the difference between your House/Office Kit and your Vehicle kit?
The JDTECK Vehicle Booster kit is supplied with everything needed for a complete "Plug N Play" setup in your vehicle. The only difference between this kit and the House/Office kit is an AC/DC Power Supply, which has been designed and tested for use with the JDTECK Booster for indoor applications where a 110v or 240v power source is available. Investing in a House/Office kit will allow you to use your booster kit both indoors and in your vehicle.
How does your Booster Kit connect to my phone?
A 3ft signal lead is supplied with each booster at no extra cost. One end of this signal lead connects to the "phone end" of the JDTECK Booster, and the other end connects to what is called a Phone Adapter (Sold Separately). On the phone itself, you will find what is called "an external antenna port" which is usually located at the back or top of the phone. The photo on the right shows where this "external antenna port" is commonly located.
What if my phone does not have an external antenna port?
In cases where an external antenna port does not exist on your phone, a universal phone adapter called a Velcro Patch Adapter or Velcro Induction Adapter is used. This adapter adheres to the back of your phone or PDA via a small strip of Velcro.
Is a dual band booster better than a single band booster?
Yes, of course! Although some manufacturers with limited engineering capabilities would like to you believe otherwise, the reasons given are not accurate and outdated to say the least. A dual band booster offers the user the flexibility to switch from service provider to provider without being concerned about if their equipment would no longer be compatible or having to buy another booster if you switch providers. besides that, several providers actively use both bands to offer an array of services to end users. For example, the most common configuration is voice communications on the lower bands like 800 MHz here in the USA and 900 MHz in overseas markets, and data on the 1900 MHz here in the USA and 1800 MHz or 2100 MHz in other markets. It is clear that a single band unit would not be practical or economical in this modern world. No matter which frequency band your phone or communication device operates on, there will always exist areas of poor reception.

Cellular reception can be likened to rays of sun light. As powerful as the sun is, there are still many areas where shadows are created and even total darkness or blackout in some instances. If the sun has this limitation, do you expect a cell network to be superior? The answer is obvious.
Shouldn’t a dual band booster be double the price of a single band unit?
It is a fallacy that a well engineered booster should be double the cost of a single band booster. A single and dual band booster both have one power circuit, one closet, and one switch. What keeps the cost down is the advanced level of manufacturing used, together with the share quantity of product manufactured.

JDTECK has supplied 1000’s upon 1000’s of boosters over the years to many large scale projects. Several National Defense agencies in the US for example, only use the JDTECK brand of signal boosters to enhance the signal strength of wireless modems used in alarm systems to monitor strategic sites across the USA. The Grey Hound Transportation line of Busses post 911 was equipped with live GPS tracking devices. The JDTECK brand of signal booster was the preferred choice for this project where every Grey Hound Bus you see on the road today is equipped with the JDTECK brand of signal booster. JDTECK was also instrumental in enhancing the design of the tracking system which helped reduce production costs. When engineers are looking for the best, they come to JDTECK, shouldn’t you?

Will a Booster increase radiation to my head?
No. It uses an external antenna that will move the transmission point away from the phone’s antenna to the antenna of the booster. Instead of a radiating signal being 1" from your head when using a regular cell phone, you will now be sending your signal out to where it works best, the external antenna of the booster kit. This also addresses the safety concerns of radiation being so close to the head. Use of our Signal Booster can greatly increase battery life! Your phone has approximately 6-7 output power settings. It is governed by the cell site how much power to put out between approximately 1/20th of a watt, to the full power 6/10ths of a watt. If you are using a signal booster your phone will power down, because it no longer needs to increase its power settings to keep the signal, thus saving battery life, which in turn reduces the level of signal radiation emitted by your phone, a bi-product of energy. This concept also applies to Cellular Repeaters. Low power phone settings, equals extended battery life.

What Tech support is there for me, if I buy this Booster?
JDTECK will provide any tech support needed to its customers, whether it is about the Signal Booster or any other info regarding antenna applications for cellular use. You may contact us at admin@e6180.com for a prompt response.

I already have an antenna mounted on my vehicle; can I use it with the booster?
Yes! However you would need to provide us the type of connector to confirm if it mates directly to the booster of if an RF adapter would be needed.

Antennas
What's the difference between 0db (unity), 3db, and 5db gain?
0-dB gain antennas radiate more energy higher in the vertical plane to reach radio communication sites that are located in higher places. Therefore, they are more useful in mountainous and metropolitan areas with tall buildings. A 2dB or 3dB gain antenna is the compromise in suburban and general settings. A 5dB gain antenna radiates more energy toward the horizon (compared to the 0, 2, and 3dB antennas) to reach radio communication sites that are further apart and less obstructed. Therefore, they are best used in deserts, flatlands, and open farm areas.
What does Omni directional mean?
This simply means that if the antenna is vertical, the signal will be transmitted equally in all directions along the horizon.
What is dB gain?
Gain is defined as the compressing of the vertical component of the antenna pattern, in effect causing the radiation pattern of the antenna to reach out further toward the horizon. It is not the creation of power, but rather a simple refocusing of energy from all directions to a specific direction. Gain is measured in decibels (dB). Vertical antennas are in fact quite directional, except in the horizontal or azimuth plane.
What is the difference between dBd & dBi?
Gain can be expressed in many different ways. The two most common are dBd and dBi. Gain expressed as dBd is a measure referenced to a half wave dipole. The dBi measure is referenced to a theoretical dimensionless point source, with a completely spherical radiation pattern. Since it has no directivity, any real antenna without excessive loss will provide some amount of gain when compared to the isotropic.
What does dual band mean?
Many networks operate on a dual band system, e.g. (800Mhz & 1900Mhz in the USA) & (900Mhz & 1800Mhz in Europe). Depending on how the network is configured will determine which frequency your phone might be operating on at any given time. Some networks seamlessly switch between both frequency bands unknown to the user. Due to the fact that so far the 800Mhz cellular band provides a stronger and more stable signal, the some networks switch to this frequency band when faced with obstructions between the cell phone and the cell site to keep the signal or when you have left a metro area. Other networks may setup their voice communications on the lower frequency band and data communications on the upper band. This is why a dual band booster is always the better option.
What antenna options do I have?
On-Glass. These antennas are easy to install and do not diminish a vehicle's value by drilling a hole. Care must be taken during installation to ensure that the antenna is mounted high up on the glass and not over defogger wires or on reflective window tint and this could impede performance.
Magnetic-mount. This type of antenna allows the easy placement and removal of your antenna on the rooftop of your vehicle. However, you will need to route the cable from outside through the door rubber to inside the vehicle. Because the coax of the antenna is so thin, this is usually very easy to do. Magnetic mount antennas are very useful for multiple vehicle applications or applications where you need to set up. Magnetic antennas also perform especially better in weak reception areas over glass mount antennas.

Window Clip. This type of antenna ideal for customers who prefer not to have route coax from outside their vehicle to inside, but would still like the superior performance of a direct connect antenna.

On Glass Patch Antenna. This antenna is the most discreet antenna you can get for your vehicle. It sticks to the inside of your windscreen so you can hide the cord for an ultra neat install. Please note there is a small percentage loss in performance by using this type of antenna.
Where should I place my antenna?
In applying all the information provided for the maximum benefit of the radiating pattern of your antenna, it would be wise to position the whip as vertically and as high as possible. If the antenna is tilted, some of the signal will be wasted because it will be directed up to the sky or into the ground. You will also want to place it on a metal surface. The metal base provides the antenna a ground plane that helps capture the signal a lot better.
Can I use a Vehicle Magnetic Mount antenna anywhere else?
Yes! Although most magnetic mount cellular antennas are manufactured for use on vehicles, these antennas work great indoors, once they are placed on a metal surface such as a filing cabinet or metal desk. If this is not available a small piece of metal about 8 inches x 8 inches can work. (Example a cookie sheet) Placing it near a window will help as well.

 
Are your consumer repeaters difficult or technical to install?
Not at all. There are 4 main components to the system: (1) Outdoor or Donor Antenna, (2) Coaxial Cable, (3) Indoor Repeater or Base Unit, and (4) Indoor Service Antenna. You simply need to mount the outdoor antenna on a pole or antenna bracket in an appropriate location, run your length of coax to the base unit, install the base unit on a wall inside the area you want to improve reception to and then connect the indoor service antenna. Most customers get this installation done in an afternoon with the help of a friend.
Which frequency band do I order?
In the USA, the two main frequency bands used at present are the 800Mhz and 1900Mhz bands. Some providers use either one or the other, while other providers use both bands. For those that use both bands, they predominantly configure their network to support voice on the lower band and data on the upper band, or 1900Mhz in metro areas and 800Mhz in rural areas. There are several other factors involved, but to make this process as easy and worry free for our customers, please just go ahead and submit your order for anyone of the compatible bands for wherever you are located. Let us know the service provider and services you would like to support and we will double check your order and let you know if any adjustments need to be made.

For the rest of the world, providers use either the 900Mhz, 1800Mhz or 2100Mhz bands. If you are not sure which frequency you are on, you may still go ahead and submit your order for either model and we will research the data and let you know.
How many calls will your repeater support?
Our repeaters will support the same amount of calls as the nearest cell tower you are getting a signal feed from.
What is Signal Isolation?
In simple terms, it is the separation that is needed between the donor (outdoor) antenna and the indoor service antenna. The donor antenna takes the signal feed from the cell tower, sends it through a length of coax to a base repeater unit, and then out to the indoor service antenna. This process is constantly monitored by the base repeater unit. If you happen to place the indoor service antenna too close to the outdoor donor antenna, the amplified signal that is broadcasting from the indoor service antenna will feed back into the donor antenna and will cause what is called signal oscillation. This can be avoided by creating sufficient distance between the indoor and outdoor antennas. This does not always relate to a specific distance as this isolation is measured in Decibels. Typically, 70dB isolation is needed for wireless repeaters to function properly.

Different materials (roof, walls, sheetrock, aluminum) all have different levels of attenuation or signal reduction. Therefore, this decibel value can be achieved in many configurations. Typically, a donor antenna installed on the roof of a single story home and the base repeater unit or indoor antenna mounted down inside the home, (not in the attic) is usually enough isolation for a repeater system to function properly. For applications where there is no obstruction between the indoor antenna outdoor antennas, then a minimum distance is required to create open air isolation.
Where should I install and point the donor antenna of my repeater kit?
We always recommend installing the donor antenna of your repeater kit on the roof of your building. There are several reasons for this.
It allows the antenna to pick up the strongest signal from the cell tower.
It allows you free access to rotate your antenna in any direction to fine tune the best input signal to the antenna.
It helps create the isolation needed between the outdoor antenna and the indoor service antenna so you do not need to reduce the output power of your repeater to avoid signal feedback or oscillation.
Since cellular signals are vertically polarized, the elements of the antenna should always be perpendicular to the ground. In the case of an Omni directional antenna, it should be pointing straight up and in the case of a directional antenna, the long end must be facing the cell tower.
What if I don’t have access to the roof, then what?
In applications where access to the roof is not possible or very inconvenient, you could consider placing the donor antenna of the wireless repeater kit on a balcony, in a window or at the side of a building. You will need to let us know this beforehand, so we can supply you the appropriate donor antenna or mounting bracket for this type of application. Please remember to provide as much distance as possible between the donor antenna on the balcony, window, or at the side of the house or apartment, and the indoor service antennas.
What does the Color of the LED’s on the repeater mean?
Green: System Functioning well Orange: Slight detection of signal oscillation. (Relocate base unit or attenuate DL power) Red: Strong detection of signal oscillation. (Power off repeater immediately, adjust dip switches, then power back on)
What should I do with extra coax?
Do not coil it up. Coiling up excess coax can create an electro-magnetic field which can drastically reduce the performance of your system. As much as it is reasonable, run out any excess coax you may have. A good practice however, would be to make one small loop right where the coax cable connects to the outdoor antenna pigtail. This will help reduce the chances of water getting into the line and causing corrosion over time, which will result in the reduction in performance of your system.
Can the internal antennas’ coverage overlap each other?
Yes! There is no need to create isolation or separation between the indoor service antennas, if multiple antennas are used. Internal antennas are all being serviced from the same output, so it’s the outdoor and indoor antennas that need isolating from each other.
Are cellular repeaters legal?
Only in a stationary application can a wireless cellular repeater be used as the perfect solution to improve wireless coverage, but is it legal? Well, depending on where you are located in the world, most service providers request that you get their permission before you install a wireless repeater kit in your home or office since the frequency band your mobile phone or PC Card is operating on is licensed to that service provider by the applicable regulatory agency in that country, and therefore the service provider now has rights to that bandwidth. In the USA, that agency is called the Federal Communications Commission. (FCC)

Now, whether that service provider decides to exercise that right against the end user is another matter. Most service providers overlook excerising this right unless they have determined the equipment you are using is causing interference to their network. In that case, they will track you down using test equipment to trace where the interference is coming from and either try to help you get your equipment setup properly and provide you a retransmit agreement which happens in many cases or, simply ask you to switch off the equipment. The customer needs to adhere to the request of the service provider if this is requested as, the service provider is mandated to protect their network in the interest of other end users, its obligations to public safety, and the substantial investments made to deploy its network. Failure to comply will result in legal action. This is why it's extremely important that the equipment you choose to invest in, is of network grade and the manufacturer' technically proficient in network engineering.

You may find the network managers of certain service providers being very opposed to consumer products being used on their networks, as there have been many instances where sub-standard equipment or poor engineering practices have resulted in network interference or worst yet, the shutdown of some sectors of the network. Other network area managers are more liberal and will simply deal with it on a case by case basis.

Network operators are also bound by regulations that don’t allow them to subsidize repeaters that amplify a competitor’s bandwidth by using a wideband or neutral host repeater. But, this is a regulation imposed by the regulatory bodies against the service providers and not the end user. So in many cases, a service provider may choose not to get “officially” involved when an end user decides to install a repeater kit, because at the end of the day, it means potential air time for all the service providers operating within that bandwidth and sometimes the only viable option to customer retention. The only obligation then left with the consumer at this point to be fully compliant, would be to obtain a retransmit agreement from their service provider. There is no cost to this agreement.

Other more conservitive service providers are very adamant about only using equipment on their network that supports their allocated bandwidth. This type of repeater is called a channel selective or narrow band selective repeater, which YN also specializes in. These repeaters are considerably more expensive than wide band repeaters because they are customized to support a specific block of channels. Some owners of large buildings have felt as though they are held to ransom by being forced by the carrier to invest in specific brands of these band selective repeaters because of the close relationship a service provider may have with a particular repeater manufacturer. This in no way brings into question the quality of a particular brand of channel specific repeater over another, but simply comes down to brand preference by the network operator.

In this industry, you will find strange phenomena’s like brand (A) repeater being accepted in one market or state on a specific network and then that same brand (A), not being not approved for use on that very network in another market, or state. Because of this lack of consistency, we personally know of some customers that have threatened to cancel all their wireless lines (sometimes numbering into the 100’s) if the service provider was not willing to consider accepting a more affordable brand of narrow band selective repeaters. YN for example is on the approved vendor’s list of some service providers, but not all. So, our products are used in some markets by network operators and not others.

At the end of the day, all the players involved need each other to survive. The carrier needs the customers' revenue and the customer needs the carriers' network. This therefore calls for mutual respect and understanding between all parties where end users want an affordable solution and carriers need to protect their network from inferior equipment. YN hopes that one day soon this industry can be properly regulated and all manufacturers of quality products have an equal and fair opportunity to service all markets.
 

Line Pattern – Laser Diode Module

Line Pattern (straight line, cross line) laser diode module can play a role in marking and positioning. They are widely used in various industrial processing machinery, such as tire forming machines, woodwork machinery, stone cutter machinery, positioning for grid lines and straight lines for fabric cutting at clothes plants, business suit pocket opening machinery, textile printing machinery, shoe making machinery, sports equipment making , glass processing machinery, circuit board laminating, electronic SMT grid positioning, printing machinery, steel plate lining, power tools and building decoration, etc.

Dot Pattern – Laser Diode Module

Dot Pattern laser diode module can be widely used in various industries, such as barcode scanners, optical pick-up unit (OPU), Laser Levels, Self-leveling rotary Laser Level, laser distance measuring instruments, temperature measuring instruments, laser therapy apparatus, beauty apparatus, infrared laser lighting, laser pointer, stage lighting, antitheft alarm systems, industrial detection instruments, gun aimer, laser guidance, aviation industrial, experiment light sources, positioning for machinery processing and automated design, etc.

                    

Woodwork Machinery             Stone Cutter Machinery                Tire Forming Machines

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Grid And Straight Line                 Clothes Processing                  Shoe Making Machinery
Aligning For Fabric Cutting     

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 Sports Equipment Making           Steel Plate Lining

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Barcode Scanners                     Self-leveling Rotary Laser Level       Power Tools

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Gun Aimer                                  Infrared Laser Lighting               Laser Therapy Apparatus

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 Stage Lighting                        Virtual Projection

We are pleasure to recommend you the launch of Cree LED Flashlights Series for consumer electronics. These flashlights contain all advantages of LED lighting:bright light, long life span,Green products and so on...

The bright light of an LED flashlight can be an invaluable tool when on a camping or hunting trip, and a potential life saver in a home or car emergency. The power and efficiency of these light sources has made them incredibly popular throughout the world. How did these bright lights become so popular? How does the LED bulb in the flashlight actually work? Science and practicality have come together to create these innovative light sources.

Brighter light is important when using an LED flashlight in the dark. Whether changing a tire or looking for dropped keys, the brighter light is a godsend. Because of the innovation of a tiny mirror placed in the bulb the light from an LED flashlight is utilized where the user needs it most. The light from an LED flashlight can be seen up to a mile away. Rather than producing a ring of light like the old flashlights it is a brighter, more focused, directional light.

Long Life Span,because of LED as light source, it can last at least 10X than traditional flashlights. Most of our LED Flashlights can last for up to 100,000 hours

Green Products,LED Flashlights do not contain mercury, so it’s environment friendly.

The most important point is that the price of our cree LED flashlights become close to traditional flashlights with the features of LED Lighting.

If you are interested in our flashlights and want to be our agents or distributors in your local market, please feel free to contact us.

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