<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Chris has it right. The TBCs (as are most products) are made for markets and price points. A VTR made for a 1" will cost more and have better quality than a TBC made for 3/4" or 1/2".<div><br></div><div>With color-under formats, you don't need the bandwidth or S/N ratio that you do for a direct color TBC.</div><div><br></div><div>In fact, the best U-Matic TBC would be a direct color TBC that had the heterodyne card. Even the mighty Zeus has that option.</div><div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; 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; 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 style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 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; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 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; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div><div>Best,</div><div>Park</div><div><br></div></div><div>C. Park Seward</div><div>Visit us: <a href="http://www.videopark.com">http://www.videopark.com</a></div><br class="Apple-interchange-newline"></span></div></span></div></span><br class="Apple-interchange-newline"> </div><br><div><div>On Jul 11, 2009, at 11:34 AM, <a href="mailto:Chill315@aol.com">Chill315@aol.com</a> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div id="role_body" style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" bottommargin="7" leftmargin="7" topmargin="7" rightmargin="7"><font id="role_document" face="Arial" color="#000000" size="2"> <div>No easy way to compare TBC's. There are a couple of things to look for.</div> <div> </div> <div>1 8 bit or 10? If 10 more quantizing levels to allow better pictures.</div> <div> </div> <div>2 What is window? For a vertical lock machine, It only has to be one line. Then you have the issue of providing advanced sync to the machine to get the correct time out of the TBC and stay centered in the window.</div> <div> </div> <div>3 Direct color always has a better bandwidth so thus more detail and quality of picture. But the real issue is how good are the filters. The pre A-D filter has to be wide enough to not cause artifacts and yet keep the video below the Nyquist frequencies. The post D-A filter has to be good enough to prevent ringing yet smooth out the samples and keep bandwidth flat. These are tradeoffs that are made during the design of a TBC. More with cost than anything else. I say that because it depends on the market that you are marketing the TBC to. </div> <div> </div> <div>4 Sample rates are always better at higher numbers. 4X subcarrier is one that is popular in NTSC because you can do some tricks in the color process. Also if you are doing any size changes it makes the math easier.</div> <div> </div> <div>5 A TBC that is designed for heterodyne process will always look worse than a direct one on a non heterodyne signal. Just the nature of the filters for Chroma and Luminance processing.</div> <div> </div> <div>Those are my thoughts. And I am no expert. These are just observations over the years.</div> <div> </div> <div>Chris Hill</div></font><div class="aol_ad_footer" id="be8489dc20b9210677e018503f7ead94"><br><font style="color:black;font:normal 10pt arial,san-serif;"> <hr style="margin-top:10px"><b>A Good Credit Score is 700 or Above. <a href="http://pr.atwola.com/promoclk/100126575x1221823300x1201398714/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=62%26bcd=JulystepsfooterNO62">See yours in just 2 easy steps!</a></b></font></div></div> _______________________________________________<br>Please trim posts to relevant info when replying!<br>Send QuadList list posts to <a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a><br>Your subscribe, unsubscribe and digest options are here:<br><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a></blockquote></div><br></div></body></html>