You need just the rise time to be that fast, or the whole pulse width? On Thu, Nov 12, 2009 at 7:16 PM, Evelyn Bwrote: > Hi all, > > Can any one recommend a manufacturer of pulse generators with rise times in > the femtosecond or low picosecond range? I have already tried Agilent, > Keithley, Picosecond Pulse labs, and Tektronix. Thanks, > > -- > EVELYN BENABE -- Nathan McCorkle Rochester Institute of Technology College of Science, Biotechnology/Bioinformatics