Converting TTL monitor to Analog

Well, you may be onto something, but it was widely accepted back in the '70's that a human couldn't see the flicker in an interlaced TV picture, and they certainly wouldn't see flicker in 60 Hz refresh of a text/graphic display. In a subdued light environment, not toally dark, but somewhat subdued, particularly in the absence of flourescent lighting, I can't see the normal 30 Hz interlace in normal network TV broadcast signal at all. I can, however, ALWAYS, see the interlace in those overlays produced on AMIGA video editing tools (probably the cheap ones, but often used at educational institutions' video production studios.) I'm aware of this only because a friend of mine told me what was used to produce them, and sometimes their credits include details about how the text and graphics were integrated into the video. I'd suggest you try looking at the 60+ Hz monitor that gives you a headache in an environment free from flourescent lighting. You might even try watching it in a subdued-light, but not dark environment, with something pleasant on the screen. I can look at code or schematic diagrams for about 8 -10 hours, after which it gives me a headache. I'm just trying to rule out effects other than the "flicker" that nobody could see back in the '70's. Back then the 30 Hz interlace was what occasionally caused folks to complain. Maybe I've just been "hardened" to that effect by much exposure. The "beat" between the nearly-60 Hz at which many monitors do their vertical retrace, and the considerably-closer-to-60 Hz at which the lights flash can certainly cause ill effects. Maybe there's an advantage to being unable to see this purported flicker. Dick ----- Original Message ----- From: "Roger Merchberger" <zmerch(a)30below.com> To: <classiccmp(a)classiccmp.org> Sent: Thursday, May 10, 2001 9:58 AM Subject: Re: Converting TTL monitor to Analog