A single event on an analog scope displays one time. There is a type of analog scope with a long persistance phosphor that will display the single event for a long enough time to analyze it or photograph it. Some high-speed film can capture the trace. This is the way it was done not so many years ago. But the short answer is a typical analog scope cannot recursively repeat the display. ----- Original Message ----- From: "Tim Hart" To: Sent: Monday, November 24, 2003 5:55 PM Subject: Re: oscilloscope stuff Well....I read over most of that document....very good. Still confused about those "Single Shot" things....would a TX/RX on say the Serial port show up if setup to trigger? Or would the next wave of nothing overwrite it? I guess what I'm asking is can an Analog O'Scope be setup to keep displaying a screen once a trigger is set on a channel? Maybe an example.... I set up the scope to trigger when channel one goes to 5v...the total screen covers 100 ms. When channel one goes to 5v I want it to show me that 5 volt pulse and the next 100ms....nothing else. Both Channel 1 and 2 are showed. Maybe I'm asking to much...maybe I need to look for both a scope and a logic analyzer? Thanks for the step in the right direction! Tim >>> rwybeaker@hotmail.com 11/24/03 03:05PM >>> Tim, For some reason my messages are bouncing off the list. I think the problem is that I've recently changed emails. Anyway, the best reference I've seen for learning how to use an oscilloscope is Tektronix's "XYZs of Oscilloscopes". It should be downloadable from their web site at http://www.tek.com/Measurement/fundamentals/scopes/literature/XYZs_of_Scopes_English.pdf It is 60 some pages long. Explains everything you need to know to get started. Of course it is Tek-centric but you will get the idea. Forward this to piclist if you wish. Robert Young YR Consulting rwyoung@ieee.org 785-218-5636 _________________________________________________________________ Has one of the new viruses infected your computer? Find out with a FREE online computer virus scan from McAfee. Take the FreeScan now! http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics