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Thread: RTP and TVE on AsiaSat 5 at 100.5°E move to C9H

  1. #101
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    Machida Hi, I am on the Gold Coast with a 2.3 M mesh dish. The 3700V tp is coming in at S 92% & Q 69%, am using Strong & Skybox.
    Make sure your LNB skew is optimal. Note TVE & RAI are not on 3962H.

    Cheers
    Hos Here



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    In the Gold Coast the reception margin for Asia 5 on a 2.3m is above threshold. Is reception from any other TP stable ? say 3660 V or 4000H ? You may have a deaf tuner If non of the TP's are stable. If other TP come in good then incoming signal is poor.

    If the the dish is motorized it may have not been set correctly. There're too few technician who know how to correctly set up H to H tracking.
    Try another LNB,
    Make sure there're no trees or other obstacles blocking the line of sight to the satellite.
    Make sure the the LNB V/H orientation is correct.

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    Thanks for all the replies. You have confirmed exactly what I was hoping, that there is a real life examples of people picking up these channels with a 2.3m without issues, even though I thought the whole idea of this thread confirmed there was some. So I agree there is definitely something wrong with my setup. With the amount of time I have spent aligning/skewing, I can nearly bet my house on it that is not the problem, at this stage I would have a guess at some tree branches even though I would have expected the dish to clear them. Hopefully this weekend I can relocate it to test. If this works it looks like it will have to end up getting permanently roof mounted, which I've realized wont be too bad, Ill just have to get a bracket welded up.

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    So I have relocated to another spot in the backyard to see if I can get it to improve, but I cant seem to improve it at all. I will still mount to the roof to get it out of the backyard, but im not too sure it will help. Again what I am after is the channels on 3700 and also the live sport feeds that pop up. This is what I currently can pick up, taken from my freesat v7. I am not sure if anyone can give me any other ideas. Thanks

    xx/xx = strength/signal

    4116 H 18399 92/60
    4003 H 28125 93/47
    3763 H 27499 92/44
    4134 H 10587 92/66
    4023 V 28095 93/66
    3823 V 27496 93/45
    3663 V 27499 92/45
    3768 V 4639 91/66

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    Machida,

    Here is your list of transponders with my V7 Max readings added:

    xx/xx = strength/signal

    4116 H 18399 92/60 (92/69)
    4003 H 28125 93/47 (92/57)
    3763 H 27499 92/44 (92/65)
    4134 H 10587 92/66 (92/66)
    4023 V 28095 93/66 (92/72)
    3823 V 27496 93/45 (92/65)
    3663 V 27499 92/45 (92/66)
    3768 V 4639 91/66 (92/77)

    Generally speaking, my readings are higher than yours, with the exception of 4134H, which is the same.

    These readings should not be treated as absolute as there can be considerable variation between brands, and individual receivers.

    But if you are running a V7 Max, it may be possible to assume a degree of relativity.

    Taken at face value, though, it would seem you might have a signal level problem.

    Four of your eight listed transponders are DVB-S, and the other four are DVB-S2.

    I have just scanned AS5 with the Strong 4922A and logged 34 transponders.

    I then scanned AS5 with the V7 Max and logged 28 transponders.

    This propensity to miss transponders is a well-documented quirk of the Freesats.

    Are you in a position to beg, borrow, or steal (no, not that) another receiver to substitute for your Freesat?

    If you can, that will tell you whether the problem lies with the receiver, or the dish/cable system.

    Only other suggestion I can make is that you delete all existing AS5 channels from the receiver and do a clean blind scan.

    I have occasionally experienced some strange behaviour when Blind Scan is compounded upon Blind Scan with the Freesats.

    You are doing a “Blind Scan” and not a “Full Scan”??

    What model V7 do you have……what is the installed firmware?
    Last edited by Thala Dan; 23-07-17 at 07:37 PM.

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    I too have had problems sometimes when using the 'blind scan' function on some receivers.

    'Blind scan' is not a 'linear' scan, but is 'stepped', the steps (of frequency, FEC, symbol rate) varying in size from one receiver to another. I think that this primarily is the problem with some receivers failing to find or load some transponders on occasions. In my experience, a manual scan of each transponder is much more reliable.

    When I last used a Freesat V7 receiver, I remember that it was a little 'deaf', i.e. it was not as sensitive as the Strong receiver it temporarily replaced and as a result it failed to load several channels, while other channels suffered from mild to severe pixelation. I am not referring in that instance to Asiasat 7 but the same comment applies none-the-less.

    If possible try another receiver.

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    Quote Originally Posted by Machida View Post

    xx/xx = strength/signal

    4116 H 18399 92/60
    4003 H 28125 93/47
    3763 H 27499 92/44
    4134 H 10587 92/66
    4023 V 28095 93/66
    3823 V 27496 93/45
    3663 V 27499 92/45
    3768 V 4639 91/66
    The frequencies in your blind scan do not correlate with the one listed on and there're just a few your receiver is picking up. I would say your LNB L/O is out of calibration. There's a good thread about C-Band LNB

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    Quote Originally Posted by B52 View Post
    The frequencies in your blind scan do not correlate with the one listed on and there're just a few your receiver is picking up. I would say your LNB L/O is out of calibration. There's a good thread about C-Band LNB
    Yes, his readings differ from mine by 3Mhz for all the transponders he lists.

    Many of the transponders on AS5 show up on my Strong receiver 1Mhz different to the Lyngsat listing.....and some transponders show up on my Freesat V7 receiver 1Mhz different to that shown on the Strong receiver.

    Sometimes, the SR also shows slight variations.

    3Mhz seems a bit excessive for a C-band LNB but, in itself, should not present a problem.....the signal should still be presented to the receiver within it's rated IF range.

    But it's why I recommended that he do a "clean" Blind Scan, as I had to do as detailed in the thread below.

    I experienced difficulty on Ku band as a result of LNB LO variations....as it happened the variation between LNBs was 3Mhz, as is the case here.

    But once the satellite was rescanned using the LNB with the "rogue" LO, the target signal was received OK.

    See posts #3 and #7 in this thread:


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    I agree with Thala Dan's comments above.

    I've occasionally come across LNB local oscillators drifting, which can be a problem. In these cases the LNB(F) should be replaced.

    However, I don't think that a local oscillator being 3MHz off frequency at C-band (and Ku-band) frequencies is going to be particularly troublesome as long as it is stable.

    In my experience, indicated transponder frequencies resulting from a blind scan do not always correspond to published data, which is one of the reasons that I tend to do a manual scan, wherever possible.

    A blind scan feature can be useful to have for discovering unlisted transmissions but it does not always give perfect results as I have indicated in my earlier reply. It should not be relied upon unnecessarily, especially if the channel frequencies are already known.

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    Thanks for all replies.

    I managed to have a play around further and at one stage saw a large signal increase when I had the ring to lnb clamp screw loose, which left the lnb pointing off center. It was obviously not pointing straight, which made me think something wrong with arm alignments etc. I managed to get another ring/lnb to try, which has gave me much better results. From what I can work out my old LNB/ring combination was poor, as the rings hole was probably too big for the LNB, allowing it to move slightly off centre. The other LNB/ring fit is very snug, and now I can receive all 3700, plus 3960 and even 4040 (which pixelates slightly/drops in and out). Unfortunately though from what Ive read on another site, there is some sport feeds that I still am missing out on. When checking signal strengths from these TP's, some have a small spike which makes me believe I still may be able to get them with further tweaking, but others dont show a thing. Hopefully once its mounted on the roof and I have some more time to have a play around I will get it a touch better.
    Last edited by Machida; 31-07-17 at 08:20 PM.

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    The feeds won't necessarily be strong as feeds are not meant for public reception but are for other (usually pay) TV networks, who use very large dishes for reception.

    You are making good progress so keep persevering in your fine tuning your setup. You will learn a lot in the process.

    A carefully-assembled and well-aligned dish is essential for good reception, but unfortunately many installations I have seen are mediocre at best, even when installed by so-called "professionals".

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