[gkase]

I just got my 1031 up and running again and want to double check something...

if I have a progressive scan DVD player (Pioneer DV563A I think) and it is putting out 480p does that mean, by definition, that it is outputing a safe horizontal scan rate of below 36kHz? I don't want to blow it again...and I no longer want to risk using my HTPC...

thanks

George

 

[Clarence]

How did you plan to connect your DVD player to the 1031? Do you have a transcoder or some other processer?


Like most DVD players, the Pioneer DV563A only outputs progressive through component outputs. S-video and composite video won't be improved (or watchable).


In order to connect your Pioneer to the 1031, you'll need a transcoder. A good one will cost as much as the projector. I've tried a couple of cheap ones ($50-$150)... dark scenes are unwatchable due to black crush.


My recommendation is a DVD player with VGA outputs... Avia ($33-$79), Coby 515 ($49-$59), or Momitsu ($279). I'd actually recommend the Avia over the Momitsu in this case because the Momitsu could overscan your 1031, but the Avia (aside from being much cheaper) is limited to 480p, which in this case is a good thing.

 

[dokworm]

Is 576P @ 50Hz safe for these beasties?

 

[PsychoDogBeast]

Hi there all


Dokworm, 720 x 576p @ 50hz is fine for these beasties it works out about 32Khz. The only trouble is getting it to sync to powerstrip timings @576p, its a pain, you check it on your monitor works fine, input it it into the 1031 and no display. It takes time but providing you keep checking the scan rate you should get it to work. I have timings somewhere at home, i will try to find them but i can't promise anything.


Best regards


James

 

[RoBro]

Hi James,


I would also be interested in the Powerstrip settings...

Roland

btw:

What means "Abuser" in your member status?

 

[molach]

720 x 576p @ 50hz is fine for these beasties it works out about 32Khz. The only trouble is getting it to sync to power strip timings @576p


I am interested to know the formula for calculating the timings for power strip, I am building my first HTPC , I have been trying to read as much as I can to understand the scan rates and resolutions etc. But I am still confused on some of the details. I wanted to ask Abuser how he calculated that 720 x 576 @ 50hz =32khz,

Please excuse the dumb questions, I just want to understand all I can before I connect the HTPC to my projector. I do not want to cause any damage.


Thanks, ED

 

[Clarence]

Quote:

I am interested to know the formula for calculating the timings... I wanted to ask Abuser how he calculated that 720 x 576 @ 50hz =32khz

bandwidth calculator

 

[PsychoDogBeast]

Hi there all


Robro, Abuser pretty much means i have two ECP's of which one is currently completely stripped and i am attacking most of the boards with a soldering iron hence abused , on a serious note the stripped ECP is a really old 4000 model from 1990 with several issues i'm trying to fix.


Molach, there is a formula available i think Clarence posted a link to it a bit ago, forgive me if i am wrong Clarence!. All you need to know is test your powerstrip timings on the monitor you use day to day, powerstrip says what current scan rate you are at in one of the timings columns and if your monitor is a pretty recent digital one, if you press the menu key on your monitor it should say what scan rate you are currently at a little tip. If you do all this before you plug yor HTPC into your projector and remember negative sync you should have no problems whatsoever.


Hope this helps


James

 

[Clarence]

Quote:

i think Clarence posted a link to it a bit ago

yep, and I reposted it above as you were typing
Quote:

if your monitor is a pretty recent digital one, if you press the menu key on your monitor it should say what scan rate you are currently at

I use an Extron 109+ the same way to test VGA DVD players and scaler boxes etc... the Extron has a little LCD readout that gives the H&V frequencies of any input.

 

[RoBro]

I thought you abuse your 1031

I am gonna abuse my 1031 as soon I get it running.

It has vertical deflection failure and I hope it is just the fuse on the GB board, but did not look at it yet.

I will try to make a digital convergence board for it as I hate fuddling with those analoque convergence pots.

I am just too cosseted with the digital convergence (including non-drift-point) of my GP-3000...

Roland

 

[thephantomlord]

Hey All,


I have also been somewhat concerned about blowing out my 1031 with a too high a scan rate as well as so I have a question..


Has anyone ever written a program to shut off the "monitor" if the scan rate is too high? Or developed a piece of hardware that could physically stop the signal from passing to the projector?


If no one has written a program I thought I might have a go at it, I don't think it would be terribly difficult using the formula from that web page Clarence listed. It might be even better to do it in reverse.. Allow the monitor to turn on once it determines the scan rate is low enough.


best regards, Aaron

 

[Clarence]

Hi Aaron... there was mention several months ago about building a overscan protection circuit for the 1031. I'll see if I can find the old post.


Here's another DVD player that should work well with the 1031Q. It's gotten some good reviews in other forums, but I don't have any first hand experience with it...

http://www.neuneo.com/products/DVD/mp4dvd_feature.asp


They have 2 versions:

The $109 version does 480p/576p (sounds ideal for 1031Q)

The $199 version scales up to 1080i/720p like the Momitsu.

 

[Clarence]

Here's the overscan protection post I was thinking about:
http://www.avsforum.com/avs-vb/showt...38#post3496638
http://www.avsforum.com/avs-vb/showt...67#post3791467


Where has WD-40 (David) been? He hasn't posted in 5 months!


-Clarence

 

[thephantomlord]

Thanks Clarence.. I wonder if WD-40 ever ended up building it.

 

[RoBro]

By the way, Clarence, how is your DP-1200 doing..

Roland

 

[molach]

Good evening,

I have been looking at the Momitsu DVD player mentioned in this thread. I have a few questions about the best way to connect it to my 1031. I have been looking at the photo of the outputs on the back of the machine. I was planning on using DVI out to a VGA adapter. then into the 1031. I was wondering about the cable I need from the VGA adapter to the Projector. I understand that the pin out on the RGB 2 input of the 1031 is a special pin out. Is RGB 1 on the 1031 a special pin out cable also? The RGB 1 input on the 1031 is a 9 pin connector, RGB 2 is a 25 pin connector, the VGA adapter is a 15 pin out. SO, I am obviously missing something in between . SO how do I get from the 15 pin VGA out of the Momitsu ,into one of the RGB inputs on the 1031?


Ed

 

[Clarence]

Quote:

how do I get from the 15 pin VGA out of the Momitsu ,into one of the RGB inputs on the 1031?

Momitsu is overkill for the 1031 and still presents a risk of overscan.


The answer is more complicated than it should be...


Momitsu (change to neg sync)

DVI-I to HD15 adapter

HD15 to 5BNC cable

4BNC to DB25


or


Momitsu

DVI-I to HD15 adapter

HD15 to HD15 standard monitor cable

Extron 109+

4 BNC-BNC cables

Extron 4BNC-DB25 adapter


or


Momitsu

DVI-I to HD15 adapter

HD15 to HD15 standard monitor cable

Extron 109+

BNC->HD15 cable

Jason dagamepimp's HD15->DB25 adapter


or, if you're any good at making cables, just make a DVI-I to DB25 cable.


Here's my recommendation... You won't appreciate it at first until you spend several days trying to figure out the connections, then several weeks trying to buy the proper connectors. But I'll post it again anyways, just so 6 months from now you can look back and say, hmmmm, Clarence's suggestion was better than I realized....


If you have a Sony VPH1031Q:

1. Get an Extron SY-25 Adapter Cable 26-039-02 DB25->4BNC adapter like ebay 3840175478 ($10-$20)

2. Get a HD15->5BNC cable like 5133809019 (search ebay for "vga bnc" for a hundred similar sellers) ($10-$15)

3. Get an Avia 480p VGA DVD player like 5727277577 ($50-$60)


That's it. You're done. No worries about overscan. Press play. Enjoy the show.

 

[RoBro]

Ok,

my 1031 is running.

Don't know which board it was, I just found 2 trimmpots named low frequency and high frequency and turned them. Low freq would not help, but high freq made it sync to both the internal pattern and the video input.

Now it is time to make it work for PC and then doing the digital convergence board.

So first I have to make an overscan protection and then go on...

Roland

P.S.:

Did anyone find WD-40?

 

[PsychoDogBeast]

Hi there all


Clarence, you beat me too it


Robro, ive 'abused' my 1031 to an inch of its life, can't think of anything else i can do with it, (apart from HD144's and 07ms'), but unfortunately it has just been sold on ebay, i have too many projectors, (i really ought to change my monicker!). I'm sorry but i can't find the powerstrip settings for 576p, ive searched my pc but no avail , I can't remember what i called it and found 1500 *.*txt files last night.


Regards


James

 

[double_U_A]

Clarence,


Didn't you do a test of the AVIA a month or so ago? Did you run that through an Extron or just VGA to DB25 cable? I have the cable and would like to have a direct connection without the fear of overscan. Can I run this without the Extron?


thanks

Chris