PVM models with E at the end

armorharmer · Post by **armorharmer** » Fri Sep 18, 2015 5:29 pm

Guys,

I gotta 20m2mde PVM monitor. The thing is - PAL geometry is perfect, at 50hz everything works without issue (Playstation one, DVD movies) but with 60hz I got bad geometry. For example, I have Sega Mega Drive Pal version with 50hz/60hz switch. If I play it at 50hz everything seems great, but if I switch I got Sonic the Hedgehog in a blue frame. I can calibrate Sonic to look OK, but then again on other games some parts of the screen are not visible. Few pixels, but again, it's something.
I also hooked up PVM with my PC, ATI graphics, crtemudriver custom drivers, I got bad geometry on lower edges. Something like this:

I tried to adjust these two values in service menu, but that's just plain impossible, I can set it to near perfect, but then again, it has curves whatever I tried. I also changed Component Level, NTSC set-up level and Model values in order to be equally to PVM 20m2mdU, which is for United States = NTSC. That also didn't help.

I suspected that there's something wrong with my monitor, but 50hz looks great, so it must be something different.

Any help on this?

armorharmer · Post by **armorharmer** » Fri Sep 18, 2015 5:51 pm

Image sample, look at the down corners.

bobrocks95 · Post by **bobrocks95** » Fri Sep 18, 2015 6:14 pm

Your image doesn't work as of me typing this, but PAL games run at a higher resolution. You're seeing blue borders around Sonic the Hedgehog when you switch to 60Hz because the resolution is decreasing, so you're seeing the screen borders, which are colorful in a good number of Mega Drive games. Your PVM might have an overscan mode you can set up to hide the borders when you switch to 60Hz, otherwise just set the overscan to whichever one you play at most frequently.

armorharmer · Post by **armorharmer** » Fri Sep 18, 2015 6:34 pm

bobrocks95 wrote:Your image doesn't work as of me typing this, but PAL games run at a higher resolution. You're seeing blue borders around Sonic the Hedgehog when you switch to 60Hz because the resolution is decreasing, so you're seeing the screen borders, which are colorful in a good number of Mega Drive games. Your PVM might have an overscan mode you can set up to hide the borders when you switch to 60Hz, otherwise just set the overscan to whichever one you play at most frequently.

Thanks bobrocks95! Yes, I can set it to overscan, but on overscan curves in corners are more visible
Example of the curves (uploaded again)

But then again, if we put MegaDrive on side, why do I have geometry problems with my PC hooked up on a PVM? Same as 60Hz streched or overscaned megadrive?

Thanks again

bobrocks95 · Post by **bobrocks95** » Fri Sep 18, 2015 6:43 pm

Okay, that's a separate geometry problem. I would think L. Pin would fix it though- can you crank it all the way so that the bottom curves inward instead of out? What you'll find is you may have to settle for a balance between the two, though I don't know how extensively you can adjust the geometry on that PVM (it shouldn't be anywhere near as bad as it is now regardless)

armorharmer · Post by **armorharmer** » Fri Sep 18, 2015 6:54 pm

bobrocks95 wrote:Okay, that's a separate geometry problem. I would think L. Pin would fix it though- can you crank it all the way so that the bottom curves inward instead of out? What you'll find is you may have to settle for a balance between the two, though I don't know how extensively you can adjust the geometry on that PVM (it shouldn't be anywhere near as bad as it is now regardless)

If I dod that, it just moves the curve in and out, but the curve itself stays. But I'm wondering, why this only happens with 60HZ signals. And not DVD player, Playstation 1, etc...

bobrocks95 · Post by **bobrocks95** » Fri Sep 18, 2015 9:35 pm

Hmm, I'll have to defer to someone with more PVM knowledge than me on that. Have you tested all the other geometry settings? Are you sure 50Hz sources aren't just cutting off the bottom more so you don't notice the distortion?

armorharmer · Post by **armorharmer** » Sat Sep 19, 2015 1:02 pm

bobrocks95 wrote:Hmm, I'll have to defer to someone with more PVM knowledge than me on that. Have you tested all the other geometry settings? Are you sure 50Hz sources aren't just cutting off the bottom more so you don't notice the distortion?

Yup, 100% sure. Tried also overscan, looks great, nothing is cut...

Skips · Post by **Skips** » Sat Sep 19, 2015 9:43 pm

Try reducing the H-size for 60hz mode (or NTSC? I can't remember which the service menu in that model calls it). I have had the US version of that monitor (a few actually) and I remember one of them doing something like this if I increased the H-Size by to much. It was awhile ago but it is still worth a shot.

armorharmer · Post by **armorharmer** » Thu Sep 24, 2015 11:08 pm

Skips wrote:Try reducing the H-size for 60hz mode (or NTSC? I can't remember which the service menu in that model calls it). I have had the US version of that monitor (a few actually) and I remember one of them doing something like this if I increased the H-Size by to much. It was awhile ago but it is still worth a shot.

Hmm, sync was set to normal value, so I guess that's not the problem.
I noticed the same problem on this thread http://shmups.system11.org/viewtopic.php?f=6&t=43066

I used this cable for my PVM20M2MDE

People were referring to the sync problem on that topic 43066.

If I put consoles in A input, the picture rolls because monitor has sync IN and sync OUT. But on B input it doesn't roll (only one sync input).

shmups.system11.org

PVM models with E at the end

PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end

Re: PVM models with E at the end