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Blank transponders on FTA scan

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  • 27-10-2010 6:25pm
    #1
    Mike 1972
    Closed Accounts Posts: 8,021 ✭✭✭


    I find when Im doing a scan on my FTA box (M Vision HD200 combo) Im getting a lot of transponders which give a 0% signal 0% quality reading particularly on 28E.

    Is there a fault in my LNB (or reciever) or are these transponders which have gone out of use/changed frequency for some reason ?

    Is there any way to update the transponder lists on my reciever (without having to laboriously manually edit/delete/insert them)

    Ive seen recievers with a blind scan feature but they tend to get the frequencies and symbol rates slightly off and end up generating duplicate entries in respect of the same transponders.


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


    yes, you should be able to delete them

    Domestic Blind scan simply try all the frequencies at a pretermined step and common symbol rates. The IF AFC results in multiples of the same.

    Professional Blind scan uses FFT spectrum analyser. 1st pass finds the transponder frequencies, no matter what spacing and the it does FFT on the baseband I & Q to figure exact symbol rate for each transponder.


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