NSS 806 - Duna World

[DK_Sat]

Duna tv is breaking up, signal 85 Quality 40 - 53 with Openbox S10, Unimash 71/2 dish.

ERT World on 3630 H 3333 signal 90 Quality 49-56 playing fine.

[Vallenato]

a 7/8 FEC is VERY hard to lock. Not much error correction data to work with, only 1 in every 8. FEC of 3/4 is 1 in every 4.

Could you explain a little bit more about the FEC 3/4, FEC 7/8 means?
or redirect to me any link
thanks in advance

[franksz]

Thanks DK_SAT.

[Tron]

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Could you explain a little bit more about the FEC 3/4, FEC 7/8 means?
or redirect to me any link
thanks in advance

Uplinkers embed error correction data in the stream so that the picture isn't lost or corrupted if there is a minor disruption, weak reception, etc. Error correcting data is used to "fill in the blanks" where data is missing due to weak or broken reception. The more error correcting data you have, the easier it is to keep a lock with a clean digital picture. The amount of error correcting data in a stream is expressed as a ratio known as Forward Error Correction, or FEC. The receiver generally auto-detects the FEC rate when it tunes a transponder, so you don't have to set this.

Basically, a 3/4 FEC means that for every 4 "bits" of data in the stream, 3 are audio/video data and 1 is error correcting data. A 5/6 FEC means that out of 6 bits, 5 are A/V data and 1 is error correcting data. 7/8 FEC means that there is 1 bit of error correcting data for every 7 bits of A/V data. So a 3/4 FEC has twice the error correction data of a 7/8 FEC (2 in every 8 bits)...