|
||||||||
s s s tuttering s s s topped (finally!). Post DSO ... |
![]() |
|
|
Thread Tools | Search this Thread |
|
|
#1 |
|
Forum Member
Join Date: Jul 2010
Posts: 24,103
|
s s s tuttering s s s topped (finally!). Post DSO ...
My Vestel T825 (alba) has been stuttering the past year, the problem moving around between different muxes, unpredictably.
Finally stopped, suddenly, after DSO on Sutton Coldfield. As I previously mentioned on Futuara's website, the problem is caused by unknown extra data in the mpeg info fields, causing far more disc access than the power supply can handle (depending on which combo of hard disk/power board on a particular model). This problem - peculiar to earlier Vestels - seems associated with DSO. I suppose we'll never know why it existed, ie what the extra info was ........ |
|
|
|
|
Please sign in or register to remove this advertisement.
|
|
|
#2 |
|
Forum Member
Join Date: May 2005
Location: Thatcham, Hannington Transmitt
Posts: 5,274
|
Quote:
My Vestel T825 (alba) has been stuttering the past year, the problem moving around between different muxes, unpredictably.
Finally stopped, suddenly, after DSO on Sutton Coldfield. As I previously mentioned on Futuara's website, the problem is caused by unknown extra data in the mpeg info fields, causing far more disc access than the power supply can handle (depending on which combo of hard disk/power board on a particular model). This problem - peculiar to earlier Vestels - seems associated with DSO. I suppose we'll never know why it existed, ie what the extra info was ........ Colin |
|
|
|
|
|
#3 |
|
Forum Member
Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
|
Quote:
the problem is caused by unknown extra data in the mpeg info fields, causing far more disc access than the power supply can handle (depending on which combo of hard disk/power board on a particular model).
This problem - peculiar to earlier Vestels - seems associated with DSO. I suppose we'll never know why it existed, ie what the extra info was ........ Until you can prove your theory, Colin's theory sounds far more logical to me. Could also be related to interference from neighbouring transmitters. |
|
|
|
|
#4 |
|
Forum Member
Join Date: Jul 2010
Posts: 24,103
|
This problem - which 1st appeared during the WInter Hill DSO "period" - has absolutely nothing to do with mux power, as can easily be verified. It regularly swtiches around between muxes, whereas the mux powers remain the same.
(Just making such a claim implies basic ignorance!). As I pointed out at length, on Futuara's blog, the problem relates to Vestel power supply defficiencies, As was well known,at the time, with various"fixes" already existing ....... I have no idea what Colin's theory is! Is it based on evidence, like mine ? |
|
|
|
|
|
#5 |
|
Forum Member
Join Date: May 2005
Location: Thatcham, Hannington Transmitt
Posts: 5,274
|
Quote:
This problem - which 1st appeared during the Winter Hill DSO "period"
Quote:
- has absolutely nothing to do with mux power, as can easily be verified. It regularly swtiches around between muxes, whereas the mux powers remain the same.
Stuttering is affected by MUX power, although it is not necessary for power to be low for it to occur. I have a very good signal level but have still experienced the problem. However a very low signal will cause the issue so if a user has the issue because of a poor signal then it is feasible that such a user could see the issue eliminated or much reduced following the increase in transmitter power at DSO.Quote:
(Just making such a claim implies basic ignorance!).
Hmmm. Quote:
As I pointed out at length, on Futuara's blog, the problem relates to Vestel power supply defficiencies, As was well known,at the time, with various"fixes" already existing ....... Quote:
I have no idea what Colin's theory is! Is it based on evidence, like mine ? Colin |
|
|
|
|
|
#6 |
|
Forum Member
Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
|
Quote:
Can you give details of where this is posted on futauras site and who posted it? I would like to read it.
.Regarding Winter Hill, this was when the 8K mode with negative UHF offsets problem was first discovered with the T810 models, and remembering back to that point, this is what people were having problems with - not stuttering, which as Colin says, is not necessarily DSO specific. |
|
|
|
|
#7 |
|
Forum Member
Join Date: Jul 2010
Posts: 24,103
|
Stuttering has nothing to do with mux power!
Please explain the physical mechanism involved, if U think otherwise. The underlying problem is "not enough power oomph", with particualar hard disk brands, triggered by more than expected accesses ....... As was established, running the disk from an external PC power supply cures all such problems. Anyone with the stuttering problem knows it only occurs when you begin recording, ie, when disk activity starts! The poorly regulated supply then crashes the controller .... Most of the problems with winter hill were specifically stuttering. I challenge anyone to either produce stuttering without the disk motor running, or with the disk removed !!!!!!!!! |
|
|
|
|
|
#8 |
|
Forum Member
Join Date: Jul 2010
Posts: 24,103
|
..... for correct signal decoding, the Viterbi detector must be able to reconstruct the "most probable" bit sequence. If it can't you get nothing (the digital cliff). There's no way in which this can produce stuttering. What you'd actulaly get is pixilation, entirely different!
|
|
|
|
|
|
#9 |
|
Forum Member
Join Date: Jul 2010
Posts: 24,103
|
Futaura's website does a fine job of tracking PVR issues - which they all have - and obviously doing this requires work & money! Well done, sir. But, I believe this particular claim is factually wrong, along with the GEMSTAR patents one.
|
|
|
|
|
|
#10 |
|
Forum Member
Join Date: Oct 2003
Location: Norfolk
Posts: 2,103
|
Sorry, I got mixed up with Selkirk in my previous post! Indeed, Winter Hill was where the stuttering problems surfaced en masse, and this was obviously the transmitter that Vestel were concentrating on when field testing the software fixes themselves in Manchester.
|
|
|
|
|
#11 |
|
Forum Member
Join Date: Jul 2010
Posts: 24,103
|
What's puzzling is, y it didn;t noticably show up on previous DSOs. Must be something they started doing later on ........
|
|
|
|
![]() |
|
All times are GMT. The time now is 05:33.



.