Alan B. Pearce writes >The TDS3014 would be four channels at 100MHz, but you lose the >external >trigger input, however by using one of the vertical channels as a trigger >input you have a three channel scope :))) Alan, I've seen you write this several times. My TDS 3034B has an external trigger - it just happens to be on the back. I can't believe you haven't looked ;-) -- Martin Farrell -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu