The low-noise-block downconverter, or LNB,, is the receiving device on a satellite dish. It is held suspended at the focus of the dish. From there, it amplifies the signals received from the satellite, downconverts the frequencies, and sends them to an indoor satellite TV receiver via coaxial cable. When two or more satellites are within a few degrees of each other, the same dish can pick up signals from all of them by using multiple LNBs. The signals are focused at different points in front of the dish, and separate LNBs receive the signals from separate satellites.
To do this, a multi LNB holder is used to suspend two or more LNBs at the correct points in front of a satellite dish. Multi LNB holders save users money and space by eliminating the need for multiple dishes to receive stations from different satellites. The number of LNBs a holder can support varies by model and style. They are also available in models that suit either round or elliptical satellite dishes. Buyers should understand when to use multi LNB holders, and what types of models and styles are available. Buyers should also understand the difference between multi LNB holders and monoblock LNBs. Finally, buyers need to know how and where to buy a high quality multi LNB holder at a reasonable price.
When to Use Multi LNB Holders
Though Sky, Freeview, and Freesat are the three main satellite networks catering to the UK, users in the UK can watch TV stations from their choice of a wide range of communications satellites that cover Europe and the Atlantic. If users already have a satellite dish, and the dish is pointing towards an additional satellite they wish to access, a multi LNB holder may be the right choice. There are several factors that determine the effectiveness of a multi LNB holder as compared to using a separate dish for additional satellites. These include:
- Size of the satellite dish installed
- Satellite signal strength
- Number of LNBs used
- Geographical location
An important point for buyers to keep in mind is that satellite signals that are available in some parts of the UK may not be available in others. Additionally, if a satellite signal is weaker in one location, a larger dish antenna may be required for better reception. In general, a larger dish gathers more of a satellite's signals than a smaller dish. A larger dish also allows the use of more LNBs.
Buyers may also consider a motorised dish. However, the motorised option allows viewers to watch channels from only one satellite at a time, while multi LNB setups can be used to view channels from different satellites simultaneously on different TV sets.
Types of Multi LNB Holders
Multi LNB holders perform a single, simple function. However, there are a number of varieties available that buyers should be aware of before making a purchase.
Multi LNB Holders for Different Types of LNBs
There are several different types of LNBs currently in use. If buyers already have one or more LNBs, they must ensure that the multi LNB holder is made for the same type of LNB. The most common difference is the diameter of the LNB neck.
Multi LNB Holders for Different Shapes of Dishes
All satellite dishes are not circular in shape. Some of them are elliptical, with height greater than width, and some are wider than they are tall. Dish antennas also come in a variety of sizes. Buyers should make sure that the multi LNB holder functions correctly with the type of dish antenna in use.
The Number of LNBs that the Multi LNB Holder can Hold
Another differentiating feature of multi LNB holders is the number of LNBs they are designed to hold. This can vary from a minimum of two LNBs, to over five LNBs. Though this appears to be a simple choice based on the buyers' requirements, it may be possible to get more out of the holder. If buyers are considering using the holder for two satellites that are over six degrees apart, it may be worth purchasing a multi LNB holder that can hold three LNBs to receive transmissions from a third satellite located between the two original satellites. For example, instead of using just two LNBs to receive transmissions from only Hotbird (13E) and Astra 2 (28E), it is possible to add a third LNB to the middle of this configuration and additionally receive transmissions from Astra 1 (19.2E).
Adjustable Multi LNB Holders
While most multi LNB holders allow adjustment along the length of the holder, some holders also allow individual adjustment of each LNB's angle and skew. The more adjustments available, the more fine tuning is possible when setting up the various LNBs.
Multi LNB Holders vs. Monoblock LNBs
Buyers looking for multi LNB holders may encounter monoblocks during their search. Monoblocks are similar to multi LNB holders in that they both hold more than one LNB. However, there are some major differences that buyers should be aware of.
Monoblocks hold two LNBs at a fixed distance from each other, typically designed for satellites at an angle of six degrees. They also have built-in DiSEqC (a special communication protocol used between a satellite receiver and other devices) switches, while multi LNB holders require the purchase of a separate DiSEqC switch. The design of monoblocks, however, leaves some disadvantages. The major disadvantage is that fine adjustments are not possible. For example, if the monoblock is designed for a six degree separation of satellites, but the satellites are seven degrees apart, it is impossible to set up the device for the highest possible reception from both satellites. Monoblocks are also difficult to use in combination with other DiSEqC switches in situations where other satellite dishes are present.
Installation of a Multi LNB Holder
Setting up a multi LNB holder and adjusting it for optimal reception from the relevant satellites is not a simple task. If buyers are not confident handling the task themselves, it is recommended to find a local professional to do the job. The following are the major steps involved in setting up a multi LNB holder.
After the target satellites are identified, the satellite dish should be adjusted so that the LNB located at the centre of the dish should point directly at the satellite with the weakest signal. Since satellite signals are reflected off the surface of the dish, the remaining LNBs should be set up opposite to the position of the remaining satellites. For example, if the next satellite is located seven degrees to the left of the weakest satellite (when viewed standing behind the dish), then the LNB should be located seven degrees to the right of the centre LNB. If it is higher than the weaker satellite, then the corresponding LNB on the dish should be lower, and vice versa. If available, a satellite meter aids in pinpointing the precise location to place the LNB.
Buying a Multi LNB Holder on eBay
Buyers looking for multi LNB holders online can find a varied collection of holders and other accessories on eBay. To begin, buyers should perform a search by entering relevant keywords into the search bar on eBay's home page. For example, a simple search for "multi lnb holder" results in a list of all multi LNB holders currently available on eBay. Buyers looking for something more specific can add more keywords to the search term. It is possible to begin a search from any page on eBay. Before committing to buying a multi LNB holder, buyers are advised to confirm that the holder works with both the LNBs and the satellite dish. If this information is not readily available on the item's page, buyers should contact the seller for more information. Buyers can also find accessories required for satellite dish and multi LNB setup including DiSEqC switches,, satellite metres,, and coaxial cable..
Buyers should also consider seller feedback before buying. Sellers with a large percentage of positive feedback from previous customers are likely to provide great customer service, prompt shipping, and a quality product.
The LNB is the device on a satellite dish that receives the satellite signals and converts it to watchable video. Multi LNB holders allow the use of more than one LNB on a single satellite dish antenna. This allows users to save space and money by limiting the number of satellite dishes needed to view channels from multiple satellites. Multi LNB holders work well when target satellites are within a few degrees of each other. There are different types of multi LNB holders available. Buyers should make sure that the holder they purchase is designed to work correctly with the dish antenna it is used with, as well as the existing LNBs. Installing a multi LNB setup can be a time consuming job. It is recommended that buyers contact a professional if not comfortable performing the task. Buyers looking for multi LNB holders online can find a wide selection of holders and accessories on eBay.