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Picture keeps freezing on Alba box


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Old 12-11-2011, 12:28
Jmoo
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Since the first phase of the digital switchover in Anglia, I've noticed the picture no longer breaks up on BBC channels such as BBC1 but what happens on this Alba box is it freezes and then jumps. Is this actually a signal issue or a box issue?

Unlike when there was a previous signal issue it would become pixelated and the sound would cut out. There's no sound issues with this.

Is it a case of a box being too old?

I also notice that when I tune the box as a 'first time installation' the information box that tells me how many channels have been added appears several times even when I press select to remove it.

This should have gone in technical - apologies.
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Old 16-11-2011, 19:29
Spot
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Bumping this as I too would be interested in an answer. I am experiencing the same fault on two separate boxes - one a Humax 9150T which I have had for some time, and I have just bought one of the Technika HD boxes off eBay for one of my mother's TVs, and am testing it here before taking it round. I was dismayed to find that this new box has exactly the same fault, as described above where the picture freezes for a fraction of a second but the sound is unaffected.

In my case I have never seen this fault on a BBC mux, and the problem I have is mostly on Mux C. I have seen it on Pick TV but mostly it is Sky News and - here's the interesting bit - on both boxes, exactly the same problem is occurring on Jeff Randall Live, and seems to be confined to the shot of his guest in the studio. Whilst the camera is on Randall, there is never a problem, but when a full shot of his guest is shown - aganst a dark blue background - there are continual glitches until the picture switches again, when the fault ceases. As a one-off you'd think it was a camera fault, but this is happening every day! This is exactly the same on both boxes. There have been other examples but this is the one I always notice. So it would seem to be the type of picture being transmitted which is the issue, and clearly the Randall example rules out the explanation being a fast moving image. This fault was present on my Humax before the pre-DSO frequency change at Tacolneston for this mux in August. DSO2 is next week here and I still hold some hope that the problem will resolve itself then - however with the FEC changes I am wondering if it could actually get worse.

By the way, I've discovered with the PVR that the way to cure the problem is to watch in slight delay - just a couple of seconds is enough, and there is no problem if viewed this way.

My reception is fine - am on high ground and can see the mast in the distance. This is a low power mux we're talking about, so it can't be signal strength. I've had other boxes over the years connected to the same aerial and never seen this on any of those.

Anyone have any ideas?
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Old 21-11-2011, 08:46
groovesection
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Join Date: Apr 2011
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Since the first phase of the digital switchover in Anglia, I've noticed the picture no longer breaks up on BBC channels such as BBC1 but what happens on this Alba box is it freezes and then jumps. Is this actually a signal issue or a box issue?

Unlike when there was a previous signal issue it would become pixelated and the sound would cut out. There's no sound issues with this.

Is it a case of a box being too old?

I also notice that when I tune the box as a 'first time installation' the information box that tells me how many channels have been added appears several times even when I press select to remove it.

This should have gone in technical - apologies.
DSO1 on Nov 9th in Anglia included some changes.
the BBC mux (formerly Mux A) closed and BBCA (the new 64QAM BBC mux) started transmitting on C55 at 100,000W
This is 10 times more powerfull than Mux A was transmitted at (10,000W)

The obvious answer is you are getting too much signal

Come Nov 23rd (DSO2) all the other muxes will be boosted to 100,000W so you will get the same problem on all channels.

Go and buy yourself a variable attenuator.
using this you can reduce the signal strength to get a perfect picture And they are only a few quid.

http://www.amazon.co.uk/gp/product/B...0DB72AAJGF3JXA

Sorted
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Old 21-11-2011, 10:10
davebav50
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If you were to look at the Digihome PVR thread (Digihome are another piece of crap sold by Argos, made by Vestel as is Alba) - there are "issues" with Vestel kit post switchover.
Buy a decent box and your problems might go away. Try a different box from Tesco - they have a 28days returns policy if its still no better.

Its also worth checking if:
- your aerial is pointing the right way,
- its in good condition,
- the cable is modern and well connected,
- the Belling Lee connector co-ax plug is metal not plastic

Its also worth waiting until after this weds when the next re-tune is due.
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Old 23-11-2011, 11:29
spiney2
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I take it this is a Vestel T825 (like mine!).

Vestel boxes have a number of issues related to cheap poor hardware, including a hardly adequate power supply. One result is the well known "stuttering" issue, prior to DSO on some transmitters, but which did not affect ALL boxes (only particular combos of power board/ disk drive).

Post DSO, if the box occasionally jumps, it will continue to. Not bad enough to worry about, really. Just small glitches.

The problem will vanish if you run the hard disk from a separate PC power supply. There's also a wire-move mod, which sometimes works, and sometimes doesn't.

http://www.vestelpvr.futaura.co.uk/T825.php
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