Satellite converter LNB, for receiving a satellite signal, failure. Satellite equipment and Digital terrestrial television T2

It's about universal linear converter KU range.

Today, with developed networks of online stores, it is quite easy to view products and compare prices. Without leaving home it is possible to buy everything you need... So let's see what the market offers us.

I understand that everything variety of satellite converters It’s impossible to cover everything, but we’ll focus on the most popular ones and those that attract the most attention.

So, let's start with the cheapest Single (with one output) converters, since they are more accessible to the buyer and will be more common. Most cheap converters in online stores they offer it for about $2, or even less.

The figure shows satellite converters budget line

TECHNOSAT T-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 corresponding antennas, such as supral, with an opening angle of 90 *. They also work in Kharkov, but you understand – the opening angle of the Kharkov satellite dish is 70*. In this case, the level and strength of the signal will not be what you expected.

I have a Sat-Integral T-800 Single and a SINGLE Pauxis PX-2100. The latter shows itself better. They work on Kharkov models of satellite antennas. Regarding the Sat-Integral T-800 satellite converter, I am completely dissatisfied. Yes, it works stably on strong transponders, but with weak ones it’s really bad...

Middle 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 EUROSAT and Eurosky EHKF-P3101A satellite converters have been performing well for a long time (more than 5 years). A LNB trademark Inverto have more compact irradiators, which contributes to better setup to nearby satellites. Often used before the advent of narrow converters like Eurosky Pro EHKF-7101A.

Premium version of Single (with one output) satellite converters. Price more than 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 a higher price are almost no different 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 of brands that behave well in the Single version will be reliable in two or four outputs.

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As you probably know, on the dish (satellite dish) there is a satellite converter or converters for different purposes.

No, it’s me, there’s only one goal!

Catch a signal from a satellite and process this signal beautifully. In order for a beautiful picture to appear on the TV.

LNB or satellite head installed at the reception satellite dish. If you want to watch movies from many satellites, then there will be not one but several satellite converters.

And so we have clarity that converters are designed to convert 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 because the frequencies at which satellites operate are too high to transmit via 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 has virtually no effect on the signal quality.

This LNB device or satellite converter is mounted on a special holder called a remote 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. C-band is a frequency band 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 divided into 2 sub-bands: lower (10.7-11.7 GHz) and upper (11.7-12.75 GHz).

The Ku-band converter includes two local oscillators to work with both sub-bands. As a rule, a local oscillator with a frequency of 10.6 GHz is used for the upper subband, and 9.75 GHz for the lower subband.

LNBs come in circular (Circle) and linear (Universal) polarization. Polarization satellite signal There are two types: left-right (circular) and vertical-horizontal (linear).

Different satellite TV operators operate 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 only on one TV, then you need a converter with one output.

If you intend to install the kit on 2 TVs, then the converter, accordingly, should have two outputs. Sometimes, in order not to run a lot of wires into the apartment, instead of installing, for example, a converter with four outputs, they use a satellite signal divider.

Outwardly, this really looks more aesthetically pleasing and in some cases much more convenient, but we should not forget that when using a divider you get about 5 decibels of noise into the load, which will negatively affect the quality of the signal.

But in some cases, you can’t do without a divider when the house has already been finished and wired for terrestrial television. IN in this case It’s just that you can’t do without a divider.

Remember!

The average converter can last from one to five years depending on factors environment, mainly from the abundance of precipitation and humidity.

There are also cases when, due to a manufacturing defect, the converter fails within a couple of weeks from the moment of installation.

But even in this case, there is no point in searching for the truth, since it is unrealistic to prove that the cause of the breakdown is the quality of the converter’s assembly, and the warranty, as a rule, does not apply to them.

There is an opinion that it is easier to buy a new one than to repair it. But this is also not a panacea for everyone. Since we are already talking about a new converter, we would like to bring to your attention a new product for reliable 4K reception.

Universal converter with linear polarization (2 outputs).

The Inverto Essential converter is the ideal solution for satellite reception broadcasting throughout Europe, allowing you to get the most 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 is relevant, low noise figure, 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) compatible
Ultra Low Noise technology ULN+
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
Low local oscillator frequency: 9.75 GHz
High local oscillator frequency: 10.60 GHz
Waterproof housing
Number of outputs: 2

How to determine if the converter is faulty?

There are not many disease syndromes of satellite converters.

And so, with manual search The receiver shows that the signal strength is more than 50 percent, but the quality is 0 percent. But often the same indicators occur when you mistakenly tuned in to another satellite.

Or even like this... sometimes converters “lose polarization”, or only some of the frequencies. However, some channels are not shown. The receiver displays the message “No signal” on them.

As a rule, the effective treatment under any circumstances is to replace the faulty converter with a new one.
It must be remembered that the new converter must be of the same polarization as the previously failed one.

At self-installation satellite converter, be careful not to change the antenna direction angle, this will save you from having to re-adjust the antenna to the satellite.

Let's sum it up

Converter functions

Converter for converting microwave to more low 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 gain received signal. After all, the signal from the satellite is received with very low power, which is completely unacceptable in the paths of 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 to switch polarization.

Universal converters differ from other full-range Ku-band converters in the versatility of the signals that control band switching and polarization, and also in the fact that these signals are transmitted over a single 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 in this case, the feed of at least one converter will not be entirely in the focus of the antenna, which will somewhat reduce the directivity of the antenna;

Secondly, purchase a design called a C/Ku rotor, which includes irradiators for the C and Ku bands, dividing the received flow into two parts. C/Ku rotors are produced combined with electromechanical polarizers.

But at the same time there are significant losses in the power of Ku-band signals and frequent exit failure of the moving parts of the electromechanical polarizer, especially at low temperatures;

Thirdly, 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 types of structural defects, for example, high damage due to exposure to sunlight or temperature changes.

We got to the place about with an offset satellite dish, read it.

Breakdowns do happen, and it is quite difficult to insure against such pitfalls when purchasing. Here's a video that can help when repairing the head:

In addition, let's look specifically at LNB setup, what and why and most importantly, what I do before the onset of cold weather and also recommend the same in the spring.

Good luck, Friends!

Price for Satcom Circular Single LNBF S-14C converter

- converter circular polarization with a noise level of 0.1 dB. Designed to receive a circular polarization signal (right R, left L) from a satellite. Satellite converter Ku band with one output. Is used for offset antennas and is equipped with a rubber cap to protect the screwing area coaxial cable.
has one exit. The converter is used in a classic installation for one television point. Using this device, you can receive channels that are transmitted in the upper Ku-band - the input frequency range of the converter is 11.70–12.75 GHz. Operating 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 ambient temperatures from -30 0 C to +60 0 C
has a standard housing, available in 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 brand:

Full range of circular converterslook

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