Yo, Andy! Analog storage scopes use a variety of methods to achieve virtually infinite persistence, allowing capture of single shot very high speed events. They are still in use (mainly using microchannel plate tubes) in many labs looking at stuff in the sub-nanosecond range. Where there are really high speed single shot requirements you can use various types of streak cameras and their relatives, where the persistence may also be provided by photographic means, electronic or traditional. This is the standard method of characterizing the pulses of picosecond class lasers. You've just been hanging around digital stuff too long... -----Original Message----- From: Andrew Warren To: PICLIST@MITVMA.MIT.EDU Date: Thursday, December 11, 1997 8:38 PM Subject: Re: Oscilloscope Question Sean Breheny wrote: > I've heard several people on the list mention Analog Storage > Oscilloscopes. I understand how a digital storage scope would work, > but how does an Analog Storage Osc. work? Sean: Analog storage scopes used a very-high-persistence phosphor which allowed the image to last for a number of seconds... As far as I know, no one makes them anymore. -Andy === Andrew Warren - fastfwd@ix.netcom.com === Fast Forward Engineering - Vista, California === http://www.geocities.com/SiliconValley/2499