Re: Strong Artefacts - Questionable SNR and high BER
Posted: Wed Feb 12, 2014 5:51 pm
at least now one thing is for sure - it's not fault of your previous 6985 card, because the new one experiences the exact same trouble and before that for months 6985 was working good for you. of course, there is always an option that currently something in your setup just immediately damages the 6985 card, but that's really the worst case scenario and let's assume it's not that for the time being.
so, the obvious conclusion from the above is that something else changed in your setup. i doubt changing the Ubuntu version has anything to do with it. also, i'm not sure if your charts are any helpful for understanding the problem, because i have no details how you collect them - they look pretty odd and off to me - basically on normal work BER is always "0" - it's really extremely rare event BER go over 0. however, if we trust them and after we're assuming the new 6985 card is not already damaged by something, then that suggests problem in the signal path - cables, LNB, power supply, etc.
unfortunately, if we consider 6985 card is now excluded as root cause of the problem, the options are a lot: unstable LNB, especially when the LNB gets hot with work more time, some problems with power supply of your computer, i won't exclude even unstable power in your outlets for which just your computer power supply cannot compensate and as result there are some rapid changes in the voltage. i really don't know - those are just ideas - more or less everything is in your hands to investigate from your side.
so, the obvious conclusion from the above is that something else changed in your setup. i doubt changing the Ubuntu version has anything to do with it. also, i'm not sure if your charts are any helpful for understanding the problem, because i have no details how you collect them - they look pretty odd and off to me - basically on normal work BER is always "0" - it's really extremely rare event BER go over 0. however, if we trust them and after we're assuming the new 6985 card is not already damaged by something, then that suggests problem in the signal path - cables, LNB, power supply, etc.
unfortunately, if we consider 6985 card is now excluded as root cause of the problem, the options are a lot: unstable LNB, especially when the LNB gets hot with work more time, some problems with power supply of your computer, i won't exclude even unstable power in your outlets for which just your computer power supply cannot compensate and as result there are some rapid changes in the voltage. i really don't know - those are just ideas - more or less everything is in your hands to investigate from your side.