Hi Olivia, Way back in my days at DEC we took data from photos out of a scope camera and used an X-Y tablet to trace the waveforms. This gave us X-Y data in a text form that we could then manipulate. I have used a number of tools, Labview (national instruments), Wavestar (Tek), Benchlink(Agilent/HP), Scope54(NESA) to effectively do the same thing, with much greater accuracy, directly from the scope. You will need to re-take the measurements if you use one of these tools. What type of accuracy do you need? If new measurements are out of the questions then I submit that you could either try the bit pad approach, or try overlaying the waveform with one you craft by hand. Sorry I am not much more help then that. Regards -Ed Sayre ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NORTH EAST SYSTEMS ASSOCIATES, INC ------------------------------------- "High Performance Engineering & Design" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr. Edward Sayre 3rd e-mail: esayre3@xxxxxxxx NESA, Inc. http://www.nesa.com/ 5 Lan Drive, Suite 200 Tel +1.978.392-8787 x 218 Westford, MA 01886 USA Fax +1.978.392-8686 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu