At 40Khz you could do a pretty good job sampling it with a PIC. Bob Ammerman RAm Systems ----- Original Message ----- From: "John Dammeyer" To: Sent: Thursday, April 18, 2002 10:13 PM Subject: Re: [EE]: viewing non-periodic waveforms with an analog scope > Quite honestly I bought my Tek TDS3032 after having similar problem with > my analog 30MHz Gould no longer being adequate. > > If you know it's just a digital wave form you could work up a simple > logic analyzer module that used a rising edge as the trigger and then > wrote the values of the input into a shift register that clocked the > data into a byte wide RAM. Once the RAM is full put the circuit into a > loop where it reads the RAM and spits it out serially again and put that > to your analog scope. > > A few GAL devices or some CMOS 4000 series counter chips will do the job > easily. > > John > > > > -----Original Message----- > > From: pic microcontroller discussion list > > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Donovan Parks > > Sent: Thursday, April 18, 2002 6:21 PM > > To: PICLIST@MITVMA.MIT.EDU > > Subject: [EE]: viewing non-periodic waveforms with an analog scope > > > > > > Hello, > > > > I have a Tektronix 465 analog scope and it works wonderfully > > for viewing periodic signals. I've now come to the point > > where I need to view a 40kHz square wave that lasts for only > > three periods (and thus is non-periodic). I can set the > > scope to single sweep mode and get it to trigget on the first > > rising edge, but the signal disappears far to fast for me to > > analysis it. Turning the time base down doesn't help as the > > width of the signal shrinks in proportion. > > > > Is there any way to use an analog scope to view this > > waveform? Would a digital scope solve my problem (I could at > > least try and capture the screen with a digital scope)? What > > do others do when trying to observe non-periodic waveforms? > > > > Thanks, > > Donovan > > > > -- > > 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 > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.