<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi, Ed, <div><br></div><div>Glad you found the links useful.</div><div><br></div><div><div><div>On Jul 12, 2009, at 10:25 PM, <a href="mailto:COURYHOUSE@aol.com">COURYHOUSE@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: 11px; 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; ">Seeing one photograph of racks reminds me... I have the rack part of the video patch bay but do not have any cables to plug in! It would be nice to set everything up this way... does anyone have any extras?</span></blockquote></div><div><br></div><div><div>You may be easily able to tell what you have by looking at the side of the jacks and then Google the part numbers. Do that first before jamming a patch cord in one. The wrong size will either not fit or cause damage.</div></div><div><br></div><div>This ADC document <a href="http://www.adc.com/us/en/Library/Literature/106085AE.pdf">http://www.adc.com/us/en/Library/Literature/106085AE.pdf</a></div><div>explains the differences and the damage that can be caused to an RCA style jack if you try using a WECO (Western Electric) style patch cord.</div><div><br></div><div>So, you need to know whether your panel has: </div><div><br></div><div>WECO or RCA</div><div>75 ohm or 50 ohm (You need 75 for video)</div><div>Terminating or non-terminating</div><div>Normaled or single jack "straight-through"</div><div><br></div><div>It might have a mix of patch styles. Look closely for part numbers, and if necessary carefully remove the jacks from the panel to investigate.</div><div><br></div><div>Aside from the physical differences, the ADC doc. outlines some problems using standard WECO jacks and patch cords with Serial Digital signals. </div><div><br></div><div>ADC has a special patch cable that allows use of existing WECO jacks with SDI signals without an impedance problem leading to excessive bit error rates.</div><div><br></div><div>Like water flowing downhill, patch bays are usually set up so that if you have—say— the output of a VTR intended to go to a switcher input, the source output goes to the top jack and the destination input is fed from the lower jack, right underneath. </div><div><br></div><div>This allows the use of "patch plugs" to direct the signal if "Straight Through" jacks are used in the jack field.</div><div><br></div><div>A straight-through jack requires a patch cable to work. It may be terminating (adds a 75 ohm resistor across the circuit when there is no patch cord inserted) or non-terminating, which requires a termination at the patch bay if the circuit is active.</div><div><br></div><div>A "Normaled" jack allows video from the rear upper jack connection to flow through to the rear lower jack connection without a patch cable in place. Most patch bays I've run into are "normaled." </div><div><br></div><div>It makes life a lot easier and requires the use of a patch only if there's something un-usual going on. Say, patching around a bad device, or sending a source to a destination that's not available without the patch.</div><div><br></div><div>Hope this is helpful.</div><div><br></div><div>Ted</div><div><br></div><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; 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; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; 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: 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; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; 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: 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; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; 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: 0px; "><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; "><br class="Apple-interchange-newline">Ted Langdell</span></font></div><div><span class="Apple-style-span" style="font-size: 12px; ">Secretary</span></div><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Skype: <span class="Apple-tab-span" style="white-space: pre; "> </span>TedLangdell</span></font></div><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">e-mail:<span class="Apple-tab-span" style="white-space: pre; "> </span><a href="mailto:ted@quadvideotapegroup.com">ted@quadvideotapegroup.com</a></span></font></div></span></div></span></div></span></div></span> </div><br></div></body></html>