Most questions proposed by our customers can find answers in this section. If you need further assistance you can contact us directly by completing the following information
Yes. Dirt in a connector core prevents light from following its path, as it gets in its way. This produces an increase in temperature at that same spot, which is directly proportional to the optical output level of the optical transmitter. With time, this situation will cause a degradation of the ferrule resulting in failure or in a higher attenuation of the signal.
All have a diameter of 125 micron (irrespective of the different protection options); however, single-mode fibers have 8.9 or 10-micron cores, while multimode fibers have 50-micron or 62.5-micron cores.
Dirt: This affects 95% of optical equipment failures. It is essential to always methodically clean the connectors to be installed, even if they are new.
The splicing process using an arc splicer ensures the attenuation figure at a given spot, while mechanical splicing doesn't guarantee a perfect operation (it has to be measured afterwards).
Yes. Optical fibers are good at withstanding longitudinal strain; however, this is not the case when they are winded over themselves (as a result of incorrect uncoiling). This usually causes premature failures as soon as traction is applied to the fibre. Extracting the fibre form the reel longitudinally is essential.
No. LNB power supply is always provided in parallel with the fiber. The optical LNB is powered through a coaxial cable. Hence, Optical LNBs are always equipped with two connectors: one “F” for the power supply, and an FC/PC connector for the optical fiber.
No. The reason is that not only their termination is different (T0X has SC connectors, while optical LNBs have FC connectors), but also because the ferrules in each connector have different finishes (APC for the T0X range, PC for the optical LNB range).
It is a plug&play range. The whole range of products is currently available (pre-terminated patch cords, splitters, attenuators, terrestrial and satellite signal mixers...). A full range of products that will help the installer provide closed quotes to their clients.
One of the product's main advantages is scalability. In other words, once a set of modules is bought, there is always the possibility of installing additional modules if necessary, without the need to discard any of the existing products.
The maximum length of the coaxial cable from the selector switch to the R-TV-SAT outlet for a correct commutation is 100 m. This length was verified with Televes' receivers; that is why we cannot guarantee this length will be valid for any receiver in the market (it will depend on the voltage levels provided by each receiver).
The Multimat system allows the grouping of up to 4 modules laterally. This allows the user to access 4 different satellites, and choose any of the 4 polarities of each of them (a total of 16 polarities). Furthermore, we can have a Terrestrial TV signal at the user's outlet if we combine it by means of a mixer (a fifth module mounted horizontally). Vertically mounting additional main units allows us to extend the number of outlets or users to serve. A full 4-satellite service can be very easily provided to a total of 32 users.
For the same scalability, the Nevoswitch system provides a better shielding (thanks to its Zamak chassis), the option for each module to be configured either as "terminal" or "cascade" by means of a switch, the ECO mode for low power consumption, and the quality of European manufacturing.
There are many questions relative to whether a splitter or a tap are bidirectional, mostly when a splitter is used as a mixer. Splitter and mixer can indeed be implemented in a single device, since the RF losses are the same for both directions. The only difference resides in current circulation: since the device is equipped with diodes, circulation is directional. The way a tap works is different, and cannot be considered bidirectional as opposed to a splitter. Tap losses (between input and bridging connection) are not equal to through losses (between output and bridging connection). That is why this circumstance has to be taken into account when figuring out the use of signals in the return channel (5 MHz – 30 MHz).
The use of a splitter to replace a tap is not recommended when the different outputs correspond to different users. The reason for this is that the rejection among the outputs of a tap is much higher than the rejection among the outputs of a splitter. Furthermore, any operation performed by a user on its UAP could impact the neighbour sharing that same splitter. Another issue that should be taken into account is the network load. When a tap is installed as the last equipment, a load is inserted on its path so that the whole network is adapted to 75 Ohm. If a splitter is installed instead, the network will not be fully loaded, which will produce impedance mismatches.
If the received signal is good enough (both in terms of level and C/N), it could possibly be used. The use of conventional splitters involves an impedance mismatch, which in turn results in signal loss, since splitter's impedance is 75 Ohm while the impedance of the professional systems (both panels and active systems) is 50 Ohm. It is advisable to use 50 Ohm receiver systems (professional antennas) as well as 50 Ohm cables and splitters.
Yo do NOT need to make any modifications. Your home TV coaxial network is the only thing you need. You will be sharing the Internet access as soon as you plug in the coaxdata to the TV outlet.
Many devices among the TV and IF signal distribution equipment have an inductive nature. Transformers are used, which are shown as a short-circuit in a multimeter. Therefore, the presence of a short-circuit in direct current in a distribution equipment does not mean that the equipment is damaged.
Even though the equipment in a SMATV (5 MHz - 2150 MHz) could be used in a CATV installation, the sums do not add up the other way round. The same goes for coaxial cable: the copper-clad steel cable typically used by cable operators is not recommended for DTT and SMATV distribution networks. The difference between a cable with a steel core and a cable with a copper core translates into a quite important difference in terms of conductivity, resistance, and most importantly resistance to corrosion. At high frequencies the external layer of the copper-clad steel plays the role of a copper conductor, but that conductivity is progressively lost as environmental conditions attack the steel. Junctions between devices are particularly affected by these circumstances, and it is there where impedance matching is most critical,since the quality of the signal depends on it to a great extent. Conclusion: even though the laws allow the use of copper plated steel in operator networks, copper cable is more suitable for SMATV networks; ultimately, it is suitable for all networks that need to keep their characteristics inalterable.
Humidity and liquid getting inside an equipment is the main cause of failure in electronic equipment.To prevent liquid from entering the equipment and protect the amplifiers, all the protection measures must be applied during the installation of the respective coaxial cables. Hence, for outdoors coaxial cable installations, the cable should always have a PE finish, instead of PVC. PVC finish should only be used indoors. Furthermore, you should always make a loop with the coaxial cable that will be connected to an amplifier or antenna, in order to prevent the liquid from directly entering the amplifier through the connector. Connection between cables should always be avoided outdoors, since they are weak points and water could enter them, or enter the system through them.
Every conductor has a limit to its bending; once exceeded, the cable will not maintain its electrical properties. For the coaxial cable, besides impedance variation, excessive bending beyond the minimum bending radius could cause the shielding foil to break, which could impact the capacity of the cable to protect the signal from interference. In cases where the cable has to follow paths with radius below the minimum bending radius, the solution is to use shielded angled connectors. There is not any specific rule to establish the minimum bending radius. Manufacturers and operators establish their own criteria. In practice, it is usually not recommended to go to radius below five times the cable diameter.
The answer is essential. Faced with the emergence of LTE/4G transmission, in the TV frequency range it is essential to have a top-quality coaxial cable in terms of screening attenuation, since one of its main characteristics should be to reject any interference present in the environment.