Results 1 to 14 of 14
  1. #1
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts

    Guide to using Unicable

    A guide to explain possible usages of Unicable/Unicable 2 LNBs. Unicable 2 is also known as JESS

    I would like to start off by stating that Unicable LNBs do not need specific tuners. You can use them with a "normal" receiver like: Technomate Nano SE, Vu Solo 2, Vu Duo, Xtrend 8000, Gigablue Quad, Mutant HD51

    In the old days, LNBs generally came with a single port. You could only connect to one receiver. Then came Quad LNBs which had four connections, Octo LNBs with eight connections. There are also switches which required a Quattro LNB but had many more outputs. All of these have one limitation, they need a signal wire directly between the tuner/s and LNB/Multi-switch. The signal cannot be split.

    A typical layout would be as pictured.
    Attached Images Attached Images

  2. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  3. #2
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    Unicable/2 LNBs have channels which they send the combined signal down. These are usually called SCR. Unicable 1 LNBs usually come with 4 SCR although they are technically capable of more. Unicable 2 LNBs usually come in 24 or 32 SCR. The unicable 2 LNBs are better value for money. Prior to purchasing a Unicable LNB, ensure that your receiver and image supports the technology. For arguments sake, if you intend to use a Freesat receiver or built -in satellite tuner on your TV, they may not support the technology. In such situations, a Unicable LNB with legacy/universal ports will be required.

    Unicable LNBs have a 40mm collar. If you intend to use on a Sky dish, you will need an adapter. Also bear in mind that eliptical dishes have squashed LNBs, so you will get some loss of signal as opposed to a non-Sky dish.

    Power pass splitters are required. They only allow current one way. Ensure that they support the frequencies in use. A 5-1000MHz splitter will not work! Plan your installation and buy sufficient splitters at the outset. Postage is usually more than the splitters if buying at a later stage.

    The splitters can be placed wherever convenient for you. For example, if you have coaxial wires from several rooms going to the loft, a splitter there will be best for you. You can use more splitters further along the circuit and in combination.

    Ensure you use good quality cable!

  4. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  5. #3
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    A simple layout. This is just to emphasize that you can use a Unicable LNB with a single tuner receiver. Perhaps someone plans to upgrade soon and the builder is on the roof, so take opportunity to change the LNB without having to change the receiver.
    Attached Images Attached Images

  6. The Following 2 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Sicilian (08-09-18)

  7. #4
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    This person has a twin tuner receiver, a Unicable LNB, but did not buy splitters. Only one tuner will receive satellite signal, so there will be limitations.
    Attached Images Attached Images

  8. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  9. #5
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    This is a better setup. A signal wire from the LNB. A splitter is used next to the receiver to provide both tuners with satellite signal.
    Attached Images Attached Images

  10. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  11. #6
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    A better usage of the technology shown here.

    Two receivers with twin tuners, that is a total of four tuners. Unicable LNBs allows us to use one signal wire from the LNB and share the signal as required.
    Attached Images Attached Images

  12. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  13. #7
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    Hopefully this diagram shows what you can achieve.

    It is important to ensure that every tuner is assigned a unique/separate/individual SCR.
    Attached Images Attached Images

  14. The Following 2 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18)

  15. #8
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts

    Tuner configuration for Non-FBC tuners:

    Tuner configuration for Non-FBC tuners:

    It should be something similar to this.

    Type of LNB/device = SCR (Unicable/Jess)
    SCR(Unicable/Jess) type = LNB. Unless you are using a Unicable/Jess switch.
    Manufacturer = self explanatory
    Model = self explanatory
    Position = leave this as 1. (Some LNBs can be programmed and used in combination)

    Repeat for every tuner. Make sure that you do not re-use the same user band channel. This applies to all tuners accessing the LNB, even if they are on a different receiver.
    Attached Images Attached Images

  16. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  17. #9
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    You can use a Unicable LNB on one tuner and normal LNBs on a diseqc switch on another physical tuner on the same receiver.

    Some Unicable LNBs have the legacy ports too. As an example is the GT-Sat GT-S3DCSS24. The sponsor sells it here:
    https://www.world-of-satellite.co.uk...e-lnb-3-legacy

    A possible usage is as pictured. Thanks to willo3092 for the picture
    Attached Images Attached Images

  18. The Following 2 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Sicilian (08-09-18)

  19. #10
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    Unicable LNBs and motorised dishes

    A Unicable LNB is a technology which allows multiple users (or multiple tuners) to access satellite broadcasts over a single coaxial cable and eliminates the need for the numerous cables required by a conventional system. In order to satisfy all users of the system the dish must remain permanently orientated to the one satellite that all the users wish to receive programing from. If the dish were to move from its permanent orientation this would disturb the viewing of all users of the system.

    A motorised dish, on the other hand, allows a single user to orientate the dish at will and access broadcasts from many satellites right across the geostationary arc. Because he is the sole user of the system the continual reorientation of the dish as he moves from one satellite to another will not disturb the viewing of other users as there aren't any.

    Trying to mix these two technologies will only end up producing unsatisfactory results. When multiple users (or multiple tuners) need to access more than one satellite the correct hardware to use is a permanently orientated dish with multiple LNBs or multiple dishes. This will ensure the viewing of one user does not disturb the viewing of other users of the system and also zapping will be instantaneous. This multi-sat system may use specially programmed Unicable LNBs and can still be delivered to multiple users over a single coaxial cable.

  20. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  21. #11
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    FBC tuners:
    Receivers like Vu Solo4K, Vu Ultimo 4K, Gigablue Quad 4K have FBC tuners.

    Please do not assume you can only use Unicable with FBC tuners. The two technologies are separate and independent. Yes, you will achieve more if you combine the two.

    Brief description of an FBC tuner:

    A satellite FBC unit/module consists of two tuners with physical connections and 6 leaf tuners without physical connections.

    The two physical connections can have different signal source. E.g. One motorised, one fixed/diseqc switch. It does not matter which way round.

    There is internal linkage between the tuners that can be used. This only applies within the same FBC module. When configuring the tuners, there is an option for "connected". This is where you specify which tuner to piggy back off. You piggy back off the tuner that has a signal wire attached.

    There is no linkage between FBC modules. If you have two tuner modules, i.e four physical connections, each module must have at least a signal wire attached to it. Currently, only the Ultimo 4K can have more than one FBC module/unit

    If using a unicable LNB, the splitter can be next to the receiver.

    A separate setup guide for Unicable and FBC tuners is here

    https://www.world-of-satellite.com/s...0PP-FBC-tuners

  22. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  23. #12
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    Multi-switches:

    Unicable2/Jess multi-switches are also available. Like conventional multi-switches, they will allow the user to combine terrestrial and satellite signal and send out to several face plates. These come in various types. Most will require a Quattro LNB, some will take a Quad LNB.

  24. The Following 2 Users Say Thank You to abu baniaz For This Useful Post:

    Donnie (13-09-18),Sicilian (08-09-18)

  25. #13

  26. The Following 3 Users Say Thank You to abu baniaz For This Useful Post:

    nsw9154 (12-10-18),Ojustaboo (02-12-18),Sicilian (08-09-18)

  27. #14
    Moderator abu baniaz's Avatar

    Join Date
    Sep 2010
    Location
    East London
    Posts
    19,028
    Thanks
    4,985
    Thanked 7,522 Times in 5,041 Posts
    Unicable devices and tune failed messages

    The default delay built into enigma2 between powering up an LNB/switch and sending tuning instructions is not sufficient for Unicable devices. This means from a cold start or first satellite service selection a "tune failed" message is displayed.

    Unicable devices are digital devices. That means a finite amount of time is required to elapse for the Unicable device to boot, between being powered up and receiving the first instructions on what to tune. Each Unicable device requires a different amount of time to boot, ranging anywhere from 0.4 seconds to 3 seconds. If not enough time has elapsed between the receiver powering up the Unicable device and the receiver sending the tuning command to it, the result will be the Unicable device will not respond to the command and a "tune failed" message will be shown.

    To avoid the "tune failed" message and make the receiver tune in a stable way the default delay needs to be lengthened. To do this follow the instructions below.

    Switch off and disconnect any other receiver that is using the same Unicable device.

    Go to Plugins Browser ( Menu > Plugins > GREEN > system plugins ) amd download "satelliteequipmentcontrol" plugin.

    Open the plugin ( Menu > Setup > Tuner config > Satellite equipment setup ) and accept the warning message.

    The setting we are interested in is "Delay after enable voltage before switch command".

    Increase this setting. "0800" is a good starting point.

    Now save the settings and exit.

    Do a GUI restart. With any luck the "tune failed" message no longer shows. If so you are done. If not, open the plugin again and increase the setting by 200. Keep doing this and testing until the "tune failed" message is no longer displayed on a GUI restart.

    Add the plugin and same delay to any other receivers that will be using this Unicable device.

  28. The Following 12 Users Say Thank You to abu baniaz For This Useful Post:

    + Show/Hide list of the thanked

    aidan (23-03-19),colheath (04-10-18),Donnie (13-09-18),fat-tony (05-09-18),kafus (12-05-19),New2SAT (05-01-19),NigelC (01-08-19),nsw9154 (12-10-18),Ojustaboo (02-12-18),Sicilian (08-09-18),twol (29-11-18),Willo3092 (05-09-18)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.