The converter (head) on the satellite dish performs a very important function, namely collects the antennas reflected by the reflector electromagnetic waves, converts them to electrical signals to transmit the signal over the cable to the receiver. Converter, or as it is also called LNB(Low Noise Block - low noise block), is installed in the focus of the antenna, that is, in the place where the reflected waves are collected (focused) into a point. The signal coming from the satellite has a very high frequency; in an ordinary cable, such a signal will quickly fade away. LNB receives the signal, amplifies it, and converts it into more low frequency, for transmission with a characteristic impedance of 75 Ohm. In a coaxial cable, the signal can be transmitted without significant losses over a distance of up to one hundred meters.
Converters come in "Ku" and "C" bands. "C" band is the frequency range 3.5-4.5 GHz, "Ku" band, the more common frequency range in which occurs satellite broadcasting, is in the range of 10-13 GHz. The converter converts these high frequencies to low frequencies (0.95-2.5 GHz), for transmission of the signal through the cable to the receiver with the lowest loss.
"Ku" band converter:
"C" range converter:
If we disassemble the converter and open its plastic casing, we will see a metal structure. The electronic stuffing of the device is hidden in metal case, in which there is a built-in outlet for the F-connector for connecting a cable. The converter is designed for outdoor operation under the influence of atmospheric precipitation, and the sensitive electronics must be reliably protected. In the focal part of the converter there is a waveguide, inside of which you can see two perpendicular metal rods, these are antennas for receiving signals from vertical and horizontal polarization... To receive a signal circular polarization you must use the appropriate converter "Circular Single LNBF", the converter for linear polarization will not be able to receive circular polarized signal. For getting maximum signal when receiving linear polarization, the converter should be adjusted by turning it around its axis.
The main characteristic of the LNB is the noise figure. The lower the value of this coefficient, the better the converter is. Converter manufacturers indicate different meanings noise, mainly from 0.5 to 0.2 dB. But product tests different manufacturers, show that in most cases these values differ from the real ones. V Lately converters appeared on the market, on which the noise figure is indicated as 0.1 dB. You shouldn't believe such "inscriptions". It is technically very difficult to achieve such parameters, and the price of such a device will be much higher.
As you probably know on the dish (satellite dish) there is a satellite converter or converters for different purposes.
No, it’s me, the goal is one!
Catch a signal from the satellite and process this signal beautifully. In order for a beautiful picture to appear on the TV.
LNB or satellite head is installed on the receiving satellite dish. If you want to watch a movie from many satellites, then the satellite converter will not be one, but several.
And so we have a clarity that converters are designed to convert the received signals, namely, to lower the frequency spectrum, linearly transfer it to a lower frequency region.
Why such transformations?
The need for such a conversion arises from the fact that the frequencies at which the satellites operate are too high to be transmitted over the cable.
The decoding of the abbreviation LNB ambiguously hints at the main characteristic of the converters and this is the noise level, you probably guessed, the lower the noise, the better.
The noise level of modern converters does not play a big role, since it usually ranges from 0.1 to 0.5 decibels and practically does not affect the signal quality in any way.
This LNB device or satellite converter is mounted on a special holder called an outrigger bracket (included in the kit satellite dish) so that the head is in the focus of the antenna mirror.
Satellite converters can be divided into groups according to several criteria.
For broadcasting TV programs from satellite, 2 bands are used. The C-band is the frequency range from 3.4 to 4.2 GHz. Ku-band is a frequency band from 10.7 to 12.75 GHz. The Ku-band is too wide, so it is split into 2 sub-bands: lower (10.7-11.7 GHz) and upper (11.7-12.75 GHz).
The Ku-band converter contains two local oscillators to work with both sub-bands. As a rule, a 10.6 GHz local oscillator is used for the upper sub-band, and 9.75 GHz for the lower one.
LNBs are available in Circle and Universal polarization. Polarization satellite signal there are two types: left-right (circular) and vertical-horizontal (linear).
Different satellite TV operators work with different polarizations. The most common ones are presented below:
Tricolor TV -CIRCULAR
NTV Plus -CIRCULAR
Telecard- UNIVERSAL
Continent TV -UNIVERSAL
Rainbow TV -UNIVERSAL
LNBs differ in the number of independent outputs. There are converters with one (SINGLE), two (TWIN), four (QUAD) and eight (OCTO) outputs. If you buy a converter to watch satellite television on only one TV, then you need a single output converter.
If you intend to install the kit on 2 TVs, then the converter, respectively, must be with two outputs. Sometimes, in order not to lead a lot of wires into the apartment, instead of putting, for example, a converter on four outputs, a satellite signal divider is used.
Outwardly, it really looks more aesthetically pleasing and in some cases much more convenient, but one should not forget that when using a divider, you get about 5 decibels of noise into the load, which will negatively affect the signal quality.
But in some cases, you cannot do without a divider when the house has already been finished and wired for terrestrial television... V in this case you can't do without a divider.
Remember!
An average converter can last from one to five years, depending on factors environment, mainly from the abundance of rainfall and humidity.
There are also cases when, due to a manufacturing defect, the converter breaks down within a couple of weeks from the moment of installation.
But even in this case, it makes no sense to look for the truth, since it is unrealistic to prove that the cause of the breakdown is unrealistic in the quality of the converter assembly, and the warranty for them, as a rule, does not apply.
It is believed that it is easier to buy a new one than to repair it. But this is also not a panacea for everyone. Since we have already started talking about the new converter, here is a novelty for your attention, for confident 4K reception.
Universal converter with linear polarization (2 outputs).
Inverto Essential Converter is perfect solution for satellite reception broadcasting throughout Europe, allowing you to "squeeze the maximum" out of your antenna.
The developers of Inverto Essential took care of the 4G / LTE signal filter, so mobile networks new generation, do not interfere with the excellent reception of this converter!
What's relevant low coefficient noise, low level Phase Noise, DVB-S2 (HDTV) and 4K Ultra HD Compatible, Low Power Consumption, High Cross-Pole Performance.
Main characteristics:
Low phase noise, DVB-S2 (HDTV) compliant
Ultra Low Noise ULN + technology
Low power consumption
High cross-polarization characteristics
High frequency stability
Noise figure: 0.3 dB (ULN +) Typ. (0.7dB Max.)
Input Low Range: 10.70-11.70 GHz
Input High Range: 11.7-12.75 GHz
Output Low Range: 950-1950 MHz
Output High Range: 1100-2150 MHz
Lower LO frequency: 9.75 GHz
Upper LO: 10.60 GHz
Waterproof housing
Number of Outputs: 2
How to determine if the converter is defective?
There are not many satellite converter disease syndromes.
And so, at manual search the receiver shows that the signal strength is greater than 50 percent, and the quality is 0 percent. But often the same indicators occur when you are mistakenly tuned in to another satellite.
Or even so ... sometimes the converters "fly out polarization", or only some of the frequencies. At the same time, it does not show some of the channels. The receiver displays the message "No signal" on them.
As a rule, an effective treatment under all circumstances is to replace the defective converter with a new one.
It should be remembered that the new converter must be of the same polarization as the one that was previously out of order.
At self-installation satellite converter, be careful not to change the angle of the antenna direction, this will save you from having to re-tune the antenna to the satellite.
Let's summarize
Converter functions
Converter for converting microwave frequencies to a lower frequency, called intermediate (900-2150 MHz). The signal at this frequency is transmitted through the cable to the receiver and fed to its antenna input.
To reduce the received frequency spectrum, one or two local oscillators are built into the converter - stabilized sources high frequency... The input frequency is reduced by subtracting the local oscillator frequency from it.
Converter for amplification of the received signal. After all, the signal from the satellite is received with a very low power, completely unacceptable in the paths of the receiving equipment. Therefore, the second, no less important, function of the converter is amplification.
The 13/18 V signal is used in modern universal converters only for polarization switching.
Versatile converters from other Ku-band full-range converters are distinguished by the versatility of signals that control band switching and polarization, as well as the fact that these signals are transmitted over the same cable with an intermediate frequency.
If there is a need to receive broadcasts in both bands (C- and Ku-), you can go in three ways:
Firstly, install two converters on the antenna, each with its own feed and polarizer. But at the same time, the feed of at least one converter will not be completely in the focus of the antenna, which will somewhat reduce the antenna directivity;
Secondly, purchase a design called a C / Ku-rotor, which includes feeds for the C- and Ku-bands, dividing the received stream into two parts. C / Ku-rotors are produced combined with electromechanical polarizers.
But at the same time, there are tangible losses in the power of Ku-band signals and frequent failure of the moving parts of the electromechanical polarizer, especially when low temperatures;
third, install a combined converter for receiving C- and Ku-bands, which is still inferior to separate converters in terms of technical characteristics.
Converters must be sealed. Otherwise, due to daily temperature fluctuations, condensation forms inside the converter, which leads to a deterioration in its parameters and, ultimately, to failure.
In addition to insufficient tightness, there are other variants of design defects, for example, high damage to sunlight or temperature extremes.
We got to the place pro with an offset satellite dish, read it.
Breakdowns happen, it is quite difficult to insure against such tricks when buying. Here is a video that can help you with head repair:
In addition, we will consider specifically the LNB setting, what and why, and most importantly, what I do before the onset of cold weather and also recommend the same thing in the spring.
Good luck Friends!
The price of the converter Satcom Circular Single LNBF S-14C
- a circular polarization converter with a noise level of 0.1 dB. Designed to receive a circular polarization signal (right R, left L) from a satellite. Satellite Ku-band converter with one output. Is used for offset antennas and is completed with a rubber cap to protect the place of wrapping coaxial cable.
has one exit. The converter is used in the classic installation for one TV point. With this device, you can receive channels that are transmitted in the upper Ku-band - input frequency range converter 11.70–12.75 GHz. Working frequency the local oscillator of the device is 10.75 GHz, and the noise level is 0.1 dB. The use of this type of converters is provided at temperatures external environment from -30 0 С to +60 0 С
has a standard body, made of high quality plastic. Each converter is packed in an individual box
Technical characteristics of the Satcom Circular Single LNBF S-14C converter:
- input frequency: 11.70-12.75 GHz
- output frequency: 950-2000 MHz
- local oscillator frequency - 10.75 GHz
- noise figure - 0.1 dB
- polarization type - circular
- number of outputs - 1
- connector protection - rubber cap
Satellite circular converters of the Satcom trademark:
Full range of circular converterslook
The procedure for ordering goods through express delivery services:
- On the site, you (the buyer) can select a product according to the price list on the first page of the site.
- By clicking on the item, you (the buyer) can read the description of the item and see the photos of this item.
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- Having decided which of the goods you (the buyer) chose, you can order it from me (the seller).
- By writing to the mail [email protected] or call tel. 0956577176.
- Having drawn up an invoice and having discussed which Express delivery service should send the order to you (the buyer).
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- The amount of the order includes: the cost of the goods, + 10-gr. delivery to express delivery services, + 1% for withdrawing funds from a Privat Bank card.
- The cost of express delivery services is paid by the buyer.
- When money is received on the Privat Bank card by 12.00, I (the seller) will deliver your (buyer) goods to Express delivery services on the same day.
- Weekends and holidays are an exception.
- Having sent you (the buyer) the goods by the Express delivery service, I (the seller) will send you to tel. SMS with the number of your declaration.
Terms of delivery view
It will be about universal linear converter KU range.
Today, with developed networks of online stores, it is quite easy to view the product and compare prices. Without leaving your home, you can buy everything you need ... So let's see what the market offers us.
I understand that everything variety of satellite converters to cover read what is impossible, but let us dwell on the most demanded and those that most of all attract attention.
So let's start with the cheapest Single (with one output) converters, since they are more affordable for the buyer and will be more common. Most cheap converters in online stores they offer for about $ 2, or even less.
The figure shows satellite converters budget line
TECHNOSAT Т-131 Single
Sat-Integral T-800 Single
SINGLE Tiger TL-1411
SINGLE Pauxis PX-2100
SINGLE WinQuest WL 804U
What I would like to note. For the most part, all such converters are short-focus and are suitable for the corresponding antennas, such as supral, the aperture angle of which is 90 °. They also work for Kharkiv ones, but you yourself understand - the aperture angle of the Kharkiv satellite dish is 70 *. In this case, the signal level and strength will not be what you expected.
I have a Sat-Integral T-800 Single and SINGLE Pauxis PX-2100. The latter shows himself better. Work on Kharkov models satellite dishes... At the expense of the Sat-Integral T-800 satellite converter, I am completely dissatisfied. Yes, it works stably on strong transponders, but very bad with weak ones ...
Medium choice satellite LNB heads.
The price ranges from $ 3 - $ 4.
EUROSAT, Eurosky EHKF-P3101A
Eurosky Pro EHKF-7101A
SINGLE Inverto Classic, Red Extend, Black Series
Gi 211 Single Universal
I would like to note that the satellite converters EUROSAT, Eurosky EHKF-P3101A behave perfectly already long time(over 5 years). And LNBs of the Inverto trademark have more compact irradiators, which contributes to better setting to closely spaced satellites. Often used before the appearance of narrow converters such as the Eurosky Pro EHKF-7101A.
Premium version of Single (with one output) satellite converters. Price over 5 $
Megasat Multifeed
Inverto MultiConnect IDLB-SINL20
Inverto ULTRA IDLB-SINL40
Inverto Universal Single (IDLP 401 SST)
What I would like to note. Satellite Single converters with over high price almost do not differ in the level and quality of reception from their cheaper counterparts. The main feature is perhaps the lower noise figure. Although LNB Inverto ULTRA IDLB-SINL40, according to numerous reviews, behaves more stable and does not sag on weak transponders.
As for TWIN and QUATTRO satellite converters, their choice is not significantly different from Single.
Converters trade marks that behave well in Single version will be reliable in two or four terminals.
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