Robocop Posted August 8, 2012 Posted August 8, 2012 I bought a new HD21 connected with quality 15m cable 1.3b HDMI to Panasonic BR BD80 fantastic picture with Blueray 1080 24p, DVD no problems. Watched 2 full length blue ray movies in 24p perfect. But when I put live music blueray concerts recorded in 1080i picture, after 10 to 20 mins the picture completely breaks up into small random colour pixels. This can only be stopped by ejecting the disc. Sound is not affected by this at all but is not running by HDMI. I also run a Nad Master DVD player in component to this projector no problems at all. I've rechecked all settings on projector and player. I've tried this also by turning 1080 24p setting off in BD80 made no difference.
Adam1553552670 Posted August 8, 2012 Posted August 8, 2012 Blu-ray music videos are usually 1080i/60 which uses about 20% more bandwidth than 1080p/24, so possibly the HDMI cable isn't coping. 15 metres is a pretty long way for an HDMI cable and this could be the problem, depending on the interaction between the cable and the hardware. Can you try another cable, or add an inline repeater (like this)? On the other hand, I would expect problems to show up pretty quickly rather than after 10 to 20 minutes...
Nigel Beale Posted August 8, 2012 Posted August 8, 2012 To check if cable is pushing the HDMI limit, try a short 1~3m cable with player close to display. Also try setting 720p on player I have a 10m cable which just stopped working on anything greater than 720p 10m is typically the limit for players without boosting as Adam suggests.
RapalloAV Posted August 8, 2012 Posted August 8, 2012 It all depends on the thickness of the HDMI cable, if its a true 24AWG you will get up to 25M from them. Problem is most companies don't advertise the AWG as usually they are selling long HDMI cables that might only be 26AWG or 28AWG, then you do need a repeater. 24AWG should be used today for all lengths 10M and more, thats if you want 1080p. Back in the days when the highest resolution was 720p/1080i, these thin cables with less copper were absolutely fine, even we sold them, when 1080p arrived we stopped! Problem is no many still sell those old ratings, they are hopeless with 1080p. You either need to get a repeater or change the cable to a genuine 24AWG grade.
Robocop Posted August 8, 2012 Author Posted August 8, 2012 Thanks guys. I will check the AWG grade of my cable and try another anyway.
RapalloAV Posted August 8, 2012 Posted August 8, 2012 Robocop;169689 wrote: Thanks guys. I will check the AWG grade of my cable and try another anyway. How will you check it?
Robocop Posted August 9, 2012 Author Posted August 9, 2012 Actually I've found the cable on the internet made in China and it says 28/30AWG,OD3.5*13mm and its a flat braided cable. So its probably suspect. I paid $300 for it about 3 years ago but never used it as my projector was HDMI to DVI and I got a cable with those connectors. I realise that most are China sourced now. I would like a Nordost one but are $1000's and whether they make a difference. Its only for picture as I run from my BR player to projector. You are right little info on the box certainly no AWG in fact not even made in China. It does have HD Vision as make. It would be prefable to run one cable rather than add a repeater would it not?
Mycenius Posted August 9, 2012 Posted August 9, 2012 The Blue Jeans ones are the only guaranteed USA made I know of (i.e. Belden Cable). They are still assembled (terminated) in China like everyone else - but the cable itself is from the good ol' US of A... Yeee- Haaa...
RapalloAV Posted August 9, 2012 Posted August 9, 2012 Its the cable it will never work at 1080p, 28/30 AWG is terrible stuff and should only be used for short lengths. This is the formula and the sizes we have made for us, anything below this is rubbish today! Buyer be warned. All our long HDMI cables have the ratings listed on the website. 1 to 4M = 28AWG 5 to 10M 26AWG 12 to 25M 24AWG
Ernie1553552694 Posted August 9, 2012 Posted August 9, 2012 Nordost only go up to 10m. Supra cables are available for reasonable coin. Less than $1k.
RapalloAV Posted August 9, 2012 Posted August 9, 2012 I would never pay anymore than $150.00 for a 15M 24AWG HDMI cable, waste of money!
Guest Posted August 9, 2012 Posted August 9, 2012 RapalloAV;169695 wrote: Its the cable it will never work at 1080p, 28/30 AWG is terrible stuff and should only be used for short lengths. Surprisingly Robo has got it working with 1080p, its 1080i that is no go
Robocop Posted August 9, 2012 Author Posted August 9, 2012 I was also surprised it worked 1080p perfectly and not 1080i. Most of my discs are 1080i concerts.
RapalloAV Posted August 9, 2012 Posted August 9, 2012 Robocop;169703 wrote: I was also surprised it worked 1080p perfectly and not 1080i. Most of my discs are 1080i concerts. Oh, well that is odd. Still anything is possible with our great friend HDMI. In cases like this you still need to change the HDMI cable to test. Move the proj close to the source and use any shorter HDMI cable and verify or not if the problem with 1080i still exists.
Nigel Beale Posted August 9, 2012 Posted August 9, 2012 @24hz @60hz is more info higher bandwidth Hence 720p@50/60 will probably work.
Robocop Posted August 9, 2012 Author Posted August 9, 2012 I borrowed a 15m 24AWG? 1.4 HDMI cable yesterday and wow it wouldn't work at all. No connection error came up on the Panasonic. But after moving the other HDMI cable away from a sub woofer mains cable(it was lying on it) it seems to now be working on 1080i. Certainly HDMI cables are very finicky. The picture from my Master Nad DVD through component is a very good picture.
Ernie1553552694 Posted August 9, 2012 Posted August 9, 2012 An object lesson in cable design and specification. Any well specified cable would be shielded too. It's not just size that matters.
Robocop Posted August 9, 2012 Author Posted August 9, 2012 According to my cable box it has three shields. Certainly I'm wary of these cables now. You are right Ernie I've always been fussy over audio cables.
Ernie1553552694 Posted August 9, 2012 Posted August 9, 2012 As a rule of thumb in any install, a low voltage cable should run across any power cables at ninety degrees at worst, or be 30cm apart.
Dunnersfella1553552754 Posted August 10, 2012 Posted August 10, 2012 Ernie;169767 wrote: As a rule of thumb in any install, a low voltage cable should run across any power cables at ninety degrees at worst, or be 30cm apart. Quoted for the truth.
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