Page 2 of 2 FirstFirst 12
Results 21 to 25 of 25

Thread: C Band Interference

  1. #21
    Junior Member
    Join Date
    May 2012
    Location
    Melbourne
    Posts
    140
    Thanks
    39
    Thanked 46 Times in 23 Posts
    Rep Power
    159
    Reputation
    505

    Default

    I moved my C BAND coax to the other input (it's dual), and the noise problem has gone! But I am still not impressed with the signal levels. My new CBAND LNBF i hope will arrive next week and I will have it installed and re-tuned. Hope it makes a difference. So it seems it was the LNBF after all.



  • #22
    Junior Member
    Join Date
    Aug 2016
    Posts
    168
    Thanks
    0
    Thanked 10 Times in 9 Posts
    Rep Power
    102
    Reputation
    210

    Default

    Very interesting! Glad that's worked out for you, have you got a few loops in your coax where it comes off the dish to help with interference and weather? I hear that's good practice

  • #23
    Moderator
    cmoore's Avatar
    Join Date
    Jan 2008
    Posts
    269
    Thanks
    105
    Thanked 226 Times in 84 Posts
    Rep Power
    288
    Reputation
    4104

    Default

    There also a few other possabilities.

    5g mobile phone. The future curse of C band satellite, the telcos have been given the 3.5 to 3.7 GHz band.
    Alication.

    I see a simalur effect my end and I know it’s not LNB generated as I have two seperate LNBs connected to a orthofeed and the spikes appear on both pol. I have a promax analog spectrum and can actually move the dish and see the spikes peak as I point north.

    Radar interference appears on the spectrum as a pulsing signal.

    You may be picking up some spurious signal from an alarm or other device local.
    Last edited by cmoore; 02-06-18 at 12:56 PM.

  • #24
    Premium Member

    Join Date
    Jan 2008
    Location
    Central Tablelands of NSW
    Age
    81
    Posts
    13,824
    Thanks
    1,242
    Thanked 3,806 Times in 2,525 Posts
    Rep Power
    1797
    Reputation
    56986

    Default

    As a thought, would it be worth putting a 'Dummy Load' on the unused output of the LNB when only one of a dual is connected?
    My only experience with a lack of performance with a Ku band brand new dual output LNB was that one connection seemed to produce a better result than the other.

    This was purely based on the image on the TV screen as we had no testing equipment other than a little signal meter.
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!

  • #25
    Junior Member
    Join Date
    May 2012
    Location
    Melbourne
    Posts
    140
    Thanks
    39
    Thanked 46 Times in 23 Posts
    Rep Power
    159
    Reputation
    505

    Default

    My new CBand LNBF arrived and has been installed. (Titanium C1W-PLL single output).

    I do see an slight improvement. Generally I am getting a few TP's I didn't before, and ones that were on the border seem more stable.
    There are some TP's that I can now tune (that never showed up before) but still arn't strong enough. I guess you have to accept what you get due to dish size and location!

    I am happy with the slight improvement. Sorry I don't have any technical before/after data.

  • Page 2 of 2 FirstFirst 12

    Bookmarks

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •