CurtPalme.com Home Theater Forum

Luuk neele · Posted: Fri Mar 27, 2015 2:04 am Post subject:

55 is registration on/off.
Will 4 and test lock to the frequency of the source?
The help should do that too.
I'll try again tomorrow.

mac · Joined: 07 Nov 2012 Posts: 143

4 TEST is genlock, yes.
Also, validate at end of adjustments. Help is suppose to do it automatically but I would do the 24 code also.

barclay66 · Posted: Fri Mar 27, 2015 7:18 am Post subject:

Hi,

I'm not an AmPro expert (not even an amateur). I just happen to remember that a jittery picture and distortions at the top can be the result of a problem with the sync signal (in this case the H-sync) from the source. This would explain why the internal test signal (with an internally generated sync) lokks OK and only the source picture is off. Check the polarity of the sync signals and try a reversed polarity for the H-sync (if that's adjustable at the source)...

Regards,
barclay66

Luuk neele · Posted: Fri Mar 27, 2015 9:06 am Post subject:

there's more,

if i connect the source and do a genlocked testpattern, i get horizontal jitter on certain lines.
if i adjust phasing the jitter shifts on a vertical plane.

how do i reverse sync polarity if i am using a pc with a rgbhv cable?

barclay66 · Posted: Fri Mar 27, 2015 10:43 am Post subject:

Luuk neele · Posted: Fri Mar 27, 2015 11:22 am Post subject:

ill download powerstrip Smile

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

make sure your graphics chip is supported, can be found on the ps site.

mac · Joined: 07 Nov 2012 Posts: 143

Ampro internal test patterns did sometimes have stability problems. Does an active image have any jitter?

Luuk neele · Posted: Fri Mar 27, 2015 2:40 pm Post subject:

i cant notice that, but the image (windows desktop) looks like crap if i set the pc resolution to 1080 and feed it to the projector, however if i switch back to the help screen which genlocks the input signal, its sharp as f*ck. back to desktop and everything looks like crap again. is there a factory reset option?

mac · Joined: 07 Nov 2012 Posts: 143

Look in the code chart for a channel "null". That resets all parameters. If you are using your PC as a source just send a grid pattern from that to do all your adjustments. It is more accurate anyways.

Still, it should not change that much so there seems to be something missing in your final setup procedure. Did you try "validate"?

Are are switching between your desktop and "4 test" correct?

mac · Joined: 07 Nov 2012 Posts: 143

Also, just a suggestion. Setting a projector up at 1080p can be very difficult for beginners. You really should start at a lower resolution first and get the hang of it and also to get some of the critical adjustments more precise. I am assuming you mean 1080p and not 1080i, correct?

Luuk neele · Posted: Fri Mar 27, 2015 3:16 pm Post subject:

yes, a pc VGA always outputs 1080 progressive, it does not output interlaced via VGA port by itself.
i can try to set the resolution to 720p for easier setup.

what do you suggest to use for sending a grid pattern from the pc? any tips?
which validate option do you mean? i have not come accross one.

mac · Joined: 07 Nov 2012 Posts: 143

Luuk neele · Posted: Fri Mar 27, 2015 3:54 pm Post subject:

i hate to be stubborn, but the VGA standard does not produce interlaced video output.
there are very little (if any) vga cards which will output interlaced video.
This does not make your statement invalid, just less likely.

any suggestions on what i should use to generate patterns on the pc?

ecrabb · Posted: Fri Mar 27, 2015 4:50 pm Post subject:

Luuk neele · Posted: Fri Mar 27, 2015 4:55 pm Post subject:

I stand corrected then. AFAIK there's no way to force Windows to send an interlaced signal over the vga. At least I haven't found it.

mac · Joined: 07 Nov 2012 Posts: 143

ecrabb · Posted: Fri Mar 27, 2015 5:14 pm Post subject:

The little Nokia app is pretty handy from memory, and there are several others like it. Just google "Nokia Test Pattern Generator"

Nokia and a couple of others are nice because they work at whatever resolution your display is set to, interlaced or not.

The problem with test pattern images (and I'm a big fan of test pattern images) is they should be just the right size for your display, or you'll be scaling, which then defeats some or all of the value of the test pattern. You can use google image search and set an exact pixel resolution and probably find what you need.

Cheers,
SC

mac · Joined: 07 Nov 2012 Posts: 143

I use the Nokia one a lot plus I have a couple others.

If you cannot find any Luuk I will look at what I have later. I am on my way out right now.

Luuk neele · Posted: Sat Mar 28, 2015 12:34 am Post subject:

im about to give up, is there no end to when it will work? right now all i am getting is crooked output, the left part of the screen has wraparound, the right also a little, i cannot converge the left part of the screen, the left top is crooked further its bowed inward from the left side of the screen and i cannot get rid of it with settings, you guessed it, i have absolutely NO idea what im doing or what im doing wrong.