CurtPalme.com Home Theater Forum

[ribaud]

I have been using a G70 for a few years now, but I'm pushing it a bit (well, more than a bit) -- I'm running 3D at 720p96. No need to tell me the problems with this set-up -- I see 'em. But I have a couple of questions for anyone who can fill me in. First, the folks at Lumagen have suggested I run a non-standard pixel timings out of my Radiance XS + 3D to lengthen the vertical interval and reduce the left-right image cross-talk. What I don't know is how, exactly, to calculate the required bandwidth for a given pixel rate -- so I have no idea what is possible, in terms of trading image sharpness for reduced ghosting. Second, I've heard of a G70 VR. How was that machine different from a standard G70?
Thanks in advance for the help!

[Curt Palme]

THE VR had fast phosphor tubes for 3D (thus the 'Virtual Reality' tag on the model number, and better lenses. I've only ever seen one in the dozens of G70s I've sold over the years.

[Curt Palme]

THE VR had fast phosphor tubes for 3D (thus the 'Virtual Reality' tag on the model number, and better lenses. I've only ever seen one in the dozens of G70s I've sold over the years.

[ecrabb]

Hi, Ribaud -

If you haven't yet, check out the The Official G70 Owners' Thread.

Analog bandwidth is a deep subject because it depends on porches (bigger porches = more bandwidth) and whether you're talking about the raw signal itself or a chain of devices... But, the simple answer is 720p/60 is about 37mhz 1080p/60 is about 75mhz. You can simple scale proportionately from there.

But, rather than rely on signal bandwidth and manufacturer's specs (which were all optimistic anyway), I'd use something ilke the Nokia monitor test app with on/off vertical lines and play with resolution and desired refresh and find the point where sharpness drops off and then back off a bit. 720p/96 probably isn't bad at all, since it's only about 70% of the bandwidth of the 1080p/60 signal I typically run.

SC

[CIR Engineering]