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Inconsistent reception from Astra 28.2E

  • 09-11-2006 10:09am
    #1
    WUSBDesign
    Closed Accounts Posts: 549 ✭✭✭


    Can't seem to make out what the problem could be, but I can receive most of the BBC1/2/3/4 channels very well and yet some of the ITV*,Filmfour channels break up every now and then - yet in clear sky conditions.

    Do I need a bigger dish? Mine is 85cm and is motorised. Tried offsetting the dish a little east/west, but the result is the same.

    EDIT: oops - meant to put this thread in the "Satellite" sub-forum - sorry.


Comments

  • #2
    watty
    Registered Users, Registered Users 2 Posts: 32,417 ✭✭✭✭watty


    Well technically 28.2 *IS* foreign satellite. There is no Irish Satellite.

    Try elevation (at 5W or 8W) and LNB rotation adjustments (28.2E).

    If 1W, 5W, 30W and 42E are OK then LNB skew or receiver overloaded due to a very short cable run to LNB?


  • #3
    WUSBDesign
    Closed Accounts Posts: 549 ✭✭✭WUSBDesign


    Hmm....let me to digest that "elevation at 5W". I'll have a go at the rotation of the LNB...

    Reception from Astra 19.2E is very stable, and I estimated that cable is more than 10m, from LNB to receiver.
    watty wrote:
    Well technically 28.2 *IS* foreign satellite. There is no Irish Satellite.

    Try elevation (at 5W or 8W) and LNB rotation adjustments (28.2E).

    If 1W, 5W, 30W and 42E are OK then LNB skew or receiver overloaded due to a very short cable run to LNB?


  • #4
    tapest
    Registered Users, Registered Users 2 Posts: 482 ✭✭tapest


    Watty
    Sorry to hi-jack but...How short is too short ??
    "receiver overloaded due to a very short cable run to LNB?"
    regards
    t


  • #5
    WUSBDesign
    Closed Accounts Posts: 549 ✭✭✭WUSBDesign


    Things improved when the LNB is rotated a little - now dropouts are less frequent though they still do occur.

    Looks like I might have to try adjusting the elevation of the dish, though I am pretty sure I have set that correctly as per the markings on the motor and the dish.

    Come to think about - it might even be the quality of the dish that is messing things up.


  • #6
    watty
    Registered Users, Registered Users 2 Posts: 32,417 ✭✭✭✭watty


    You can't go by the markings of the dish. They are too approximate. The motor, don't touch. Fine tune the dish elevation on motor arm. Dishes squint.


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  • #7
    WUSBDesign
    Closed Accounts Posts: 549 ✭✭✭WUSBDesign


    Thanks, watty. I am just beginning to wonder if the wrong elevation of the dish is the also cause of my system not receiving Hispasat - the dish setup is at the back of my garden and it had to "look" over the top of my house for 30W.


  • #8
    watty
    Registered Users, Registered Users 2 Posts: 32,417 ✭✭✭✭watty


    If the houuse is 50ft away no problem. www.smw.se download free Sw.
    your position E/W is -
    It give elevation for hispasat for your locatin. Then junior cert Geometery will tell you if an objec is far enogh awya for its heioght


  • #9
    WUSBDesign
    Closed Accounts Posts: 549 ✭✭✭WUSBDesign


    The house is less than 50ft away, but I had the dish mounted about 2.5m high. Did a considerable amount of calculations re height of house, length of garden, etc.

    There is a web-based calculator which determines the azimuth/elevation of Hispasat by using the sun's azimuth at a specific time of the day (based on Dublin's geographical location). Had to get my wife to memorise "which particular branch, of the tree in front of the house, the sun coincide with at 3pm on whatever-day" :D


  • #10
    WUSBDesign
    Closed Accounts Posts: 549 ✭✭✭WUSBDesign


    Thanks to hints from watty, I think I have corrected the unstable signal reception from Astra2....

    I took advantage of Saturday's blessed morning time to re-adjust the elevation of my dish - basically a case of iterating the dish's elevation and checking the signal quality indications on the TV. My neighbours must be wondering if the dish setup became dodgy after the recent windy weather here...

    In re-reading (and understanding better) this thread, I was tempted to redo the dish realignment using 5W, but then decided I don't have a LOS - since my dish was at the back and the row of houses extended to the east.


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