<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Ah, RS170A. The kids all go "eh?" Best 'splanation of Colour Framing I ever heard was delivered by Ampex's Michael Arbuthnot, who did a stint at daVinci, I believe and.... where is he now? Nobody knows what that 2F/4F switch on the D-Betas is for, anymore, well, hardly anybody. Trouble is that interlace is really starting to get in the way.<div><br></div><div><div><div>On 7-Apr-09, at 8:30 AM, C. Park Seward wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Back in the early days of 1" VTRs, we didn't have everything capable of correct SCH phase. Some sync generators, cameras, CGs and TBCs were not RS-170A and vectorscopes didn't have a convenient SCH phase indicator. Also, things drift. So the only way to insure perfect RS-170A coming out of the switcher was to use a Sync-Proc. Worked well.<div> <br><div><div>On Apr 7, 2009, at 7:03 AM, <a href="mailto:Chill315@aol.com">Chill315@aol.com</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Arial; font-size: 10px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div>I wanted to do the same thing but did not see the need in a post production environment. The most important thing to us was to insure that SCH was always on the money. That prevented shifts while editing. Also we needed to do this for the clone tapes used to do dissolves to the same material.</div><div> </div><div>I may have misled people a little bit when I talked about the 180 degree shift. This was meant to be the 180 degree difference between each line of the NTSC system. The old Fsc divided by 455 / 2 gives us the change on each line. NTSC is a great system for all its drawbacks. When you think that the engineers designed it over half of a century ago and it still makes good pictures today. </div><div> </div></span></blockquote></div></div></blockquote></div><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>Joe Owens</div><div>Presto!Digital Colourgrade</div><div>302-9664 106 Avenue</div><div>Edmonton, Alberta T5H0N4</div><div>+1 780 421-9980</div><div><a href="mailto:jpo@prestodigital.ca">jpo@prestodigital.ca</a></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span> </div><br></div></body></html>