Antenna splitters are special products that are used if there are several TV receivers in the room and it is necessary to coordinate and distribute a signal between them. Splitters (they can also be called crabs) come with and without an amplifier; the second type allows for frequency separation of channels between at least 3 household appliances. Most dividers are equipped with special protection against abnormal voltage that occurs during a thunderstorm. Choosing antenna splitters is a responsible step, and a rating of the best and most reliable products will help you understand this matter.
Device settings
When choosing, you need to take into account the technical parameters of the device:
- The attenuation level indicates how much the signal transmission power through this device is reduced. The smaller this value, the better the device works.
- A splitter is designed to distribute the incoming signal between several television receivers. Typically the number of recipients is from two to eight. It is important that the number of outputs corresponds to the number of pieces of equipment. There are also splitters for 16 recipients, but such models are relatively rare.
- Bandwidth characterizes the frequency range used. In most cases, for terrestrial television it is 5-1000 MHz, and for satellite television it is 5-2500 MHz.
- An active antenna splitter additionally uses an amplifier. It is capable of providing increased power during signal transmission. Such devices are more expensive and can work with no more than two devices.
When choosing a splitter, its parameters must correspond to the specific situation of the buyer. If not all connectors will be used, it is recommended to install plugs on the remaining ones.
The device indicates the degree of signal attenuation for each connector Source stroy-podskazka.ru
Purpose
What are the differences between 3G and 4G networks: features, advantages and disadvantages
When connecting, the ADSL splitter guarantees signal filtering. Without a device, a connected phone can significantly affect the quality of network information transmission. Possible outages and unstable Internet operation. In turn, strong interference also occurs when using the telephone or fax.
It is not recommended to connect the line directly to the computer. This is done to test the connection. The instructions indicate a diagram for connecting the ADSL splitter to the switching network.
Varieties
Various types of structures are used, each of which has its own characteristics. When choosing, you need to take into account that the preference depends on the tasks facing the user.
Splitter
This device divides the incoming signal into the required number of consumers. At the same time, its characteristics change accordingly. This can be illustrated with the following example. If the input signal has a level of 12 dB, then when divided into two TVs, each of them will receive 6 dB. For three, this value will be equal to 4 dB.
The use of a threaded connection ensures a reliable connection Source stroy-podskazka.ru
Couplers
This design is used for signal conversion in apartment buildings. At the same time, it is distributed to each floor by splitters. And then to each apartment using taps. Here, two outputs are usually used, and the signal on one of them is more powerful. The latter can be used to connect another similar device. The cable from the weaker output will be used to transmit the signal to the apartment.
Adders
They can be used to simultaneously work with terrestrial and digital channels. It can only work with two consumers. If one of the receiving devices is disabled, it will still be possible to use the other.
Using different types of plugs Source stroy-podskazka.ru
What type of splitter connector should I choose?
Splitters, both planar and welded, are produced with three types of end designs:
- terminated with connectors with SC/UPC connector,
- terminated with connectors with SC/APC connector,
- unfinished.
Dividers with connectors at the ends are used in PON, built on mechanical connections of the main line and splitters. Despite all the disadvantages of such a connection - greater signal attenuation, for example - it has one significant advantage. In the event of a line failure due to backward radiation at a wavelength of 1310 nm, it is quite possible to find the source of the problem by sequentially disconnecting the connectors and observing whether the radiation in the network has disappeared or not. In the case of using welded joints, this is not possible.
SC/UPC connector
- Blue (for multimode fiber - gray).
- The core (ferule) is polished at an angle of 90º to the fiber (cheaper and easier polishing).
- Insertion loss - 0.2 dB.
- Standard for Ethernet.
SC/APC connector
- Green color.
- The core is polished with an 8º bevel. This polishing allows the reflected signal to escape from the fiber and therefore reduces its influence. While reflection is not critical for an Ethernet network, it is a big problem for cable TV.
- Insertion loss - 0.3 dB.
- Due to its low reflectivity, it is used for cable television traffic .
Unfinished splitters
Everything is simple here - unfinished dividers are used for welded connections in PON. This method allows you to reduce signal attenuation and prevent problems typical for mechanical connections - the connector “jumped out” of the socket, the connector was forgotten to be connected, etc.
Moreover, they are cheaper.
The network administrator will only regret using welding in the event of a return signal at a wave of 1310 nm, which completely disables the line. Having welded joints, it will be almost impossible to find the “pest”.
How to choose
It is important to understand that the more receiving devices, the more the incoming signal will weaken. This is acceptable in cases where it is initially high. If this is not the case, then you need to choose an active antenna splitter. It is advisable to install it next to the receiving antenna.
First you need to determine the required device parameters. To do this, go to the settings and look at the frequencies of the channels used. It is important that the upper threshold of the range is above this frequency.
You need to take into account the number of television receivers available and think about whether you plan to buy new equipment. If this is the case, then splitter outputs must also be provided for them. Their quantity in the purchased device must correspond.
When purchasing, you need to evaluate the appearance of the device. If you plan to place it in a special box, then you need to select the dimensions so that it can fit there.
The TV body may have a place to mount the device. If they plan to fix it here, the splitter needs to match it. It is unacceptable to attach it in such a way that it dangles freely.
When purchasing, you need to determine the types of connectors available. They must match the existing cables. Having made your choice, it is recommended to look on the Internet to see which models are suitable. If necessary, you should prefer an active splitter.
Determining the frequency of the channels used for the correct choice of splitter Source lampa-ekb.ru
Principle of operation
At first glance, it may seem that you can directly connect several output cables to an input cable. In fact, although this will work, it will make the signal so low quality that it will be impossible to watch.
The fact is that each cable has a certain characteristic impedance. They will be different for the input and output. If they are connected to another using twisting, then part of the signal will pass through it, and most of it will be reflected. The device is designed in such a way that the loss of quality during transmission is minimal. An active antenna TV splitter can completely compensate for the loss of signal quality.
Connecting two TVs to a TV divider Source paes250.ru
Active splitter (Klark Teknik Square ONE Splitter)
This is the name for devices whose design is based on active circuitry. Their use allows us to solve many problems that arise when using passive (both parallel and transformer-isolated) splitters.
The input path of the device is equipped with an audio signal amplifier with an adjustable gain. This provides amplification to the weak audio signal from the microphone, bringing its intensity to the optimal level. The audio signal is then transferred to a buffer, where it is electronically balanced and distributed between outputs, or brought to line level (so it is protected from external interference) and fed to the mixing console.
The use of active splitters reduces the length of highly interference-sensitive cable lines, which reduces losses and noise caused by long cables. Overall, this improves sound quality, giving it brightness and clarity. The electronic outputs are also equipped with grounding switches.
Also, the transformer-isolated output (traditionally it copies the post-preamp audio signal, but on the Square One Splitter it is a branch before the amplifier) is buffered and amplified, which protects it from wave resonances. This effect is widely in demand among broadcasting companies who prefer to use their own sound reinforcement circuit, powered by a separate source.
Also useful functions of the device include its equipping with a local audio signal level indicator, the presence of +48V phantom power and the solo function with a headphone output, which allows you to locally listen to sound from the selected channel.
Making a connection
Please note the following when connecting cables:
- If the device has coaxial jacks, then you can connect any type of cable to them using regular antenna plugs.
- When threaded connections are present in the splitter, it is assumed. That the connection will be made using a thin cable.
- For screw terminals, any type of cable can be used.
In order to make a connection, you must perform the following steps:
- Secure the splitter using the chosen method. This can be done by mounting it on the wall, fixing it on the TV receiver mounts, in a special niche, or in a plastic box.
- The rivets must be removed from each splitter connector.
- Cables from TVs are connected to the corresponding sockets.
- Insert the antenna cable.
After this, you can start viewing available programs. After installation is complete, you need to check the image quality. If it is not high enough, it is recommended to use a more powerful antenna, or use an active TV divider.
When the image is no longer satisfactory
It happens that after introducing a splitter, the image quality on several TVs deteriorates. Some people get out of this situation by connecting a Polish antenna with an amplifier. And the second solution to the problem is to purchase a television splitter with an amplifier. The last method is good if before this the TV showed without any complaints and, in fact, there were no complaints about the antenna.
But a TV technician can give you more precise advice in this situation. It has devices for measuring signal strength. This is important to do because the image may also be distorted if there is too much signal in the background.
There are 3 ways to implement additional devices that increase signal strength:
- At high load transfer rates of the splitter, you can use one intermediate amplifier at the input to the splitter.
- If overload is likely, it is better to give preference to separate amplifiers at each output. And it is set independently at each output.
- Combined reinforcement. One is placed at the entrance and additional separate ones at the exits.
Splitters are widely popular devices these days. If there is more than one TV in the house, then you cannot do without such a device. Some craftsmen make such devices themselves. Someone, wanting to save money, buys Chinese splitters. But the safest thing to do is buy this item from a trusted manufacturer, and use the services of a teleworker for installation.
Using dividers in an apartment
It is necessary to pay attention to the location of devices inside the apartment. The installation rules depend on the connection structure. It can be equilibrium or nonequilibrium. It is convenient to illustrate this with the following example.
Splitter for connecting three TVs Source paes250.ru
The television signal enters the apartment via one cable. The receivers are at the same distance from him. In this case, you can use a simple divisor. Which will divide the input signal into several identical ones.
If the TVs are located at different distances from the input cable, the connections will have different lengths. Thus, the closest signal will be of the highest quality, and the most distant signal will be of the least quality. There is a nonequilibrium structure here.
Scheme for using TV splitters Source 220v.guru
In this case, a coupler is used that will split the signal into two, one of which is strong and the other relatively weak. The last one is for the nearest TV receiver, and the other is for the next coupler. This scheme will allow you to get maximum video and audio quality on all available devices. Splitters will allow you to redistribute the power of the input signal.
When using a splitter, you must choose a suitable location for it. It is important to keep the cable length to a minimum. When using three or more TVs, the signal is expected to become quite weak. This will allow you to watch analogue channels, but not digital ones.
Antenna divider for two inputs with plugs Source art-liga.rf
For the latter, high signal quality is critical. In this case, it is recommended to use an active splitter. It will enhance the input signal to the required extent. It should be taken into account that signal amplification can also be done immediately after the antenna.
The more outputs the divider has, the stronger the attenuation will be. Therefore, it is not recommended to purchase a device that has more sockets for connection than necessary. If there are only two TVs, it is not recommended to take the device for 3 or more television receivers. When using it, not only signal weakening can occur, but also image ghosting. The latter is due to the presence of empty connectors. To avoid this effect, a plug with a resistance of 75 Ohms is placed on the free connector, which simulates a connected load.
Connecting a TV splitter Source stroy-podskazka.ru
Peculiarities
Most modems and routers come included. There is already a splitter that meets all the necessary requirements. Following the instructions, connect all wires.
Note! You should remember the rule common to all models: the input, that is, the line connection, is always located on the opposite side from the other two connectors.
The LAN cable is for connecting to a computer. It cannot be interchanged with the telephone cable. If the latch on the wire connector is damaged, it must be replaced. When connected, the cable should click and when you try to pull it out, it should be held in place.
