On Tue, 6 Oct 2009 11:27:14 -0400, you wrote: >Anyone know what's inside the logic probe for the HP 54645D MSO? Is >it possible to build my own (slow) interface until I find a good deal >on a new/used one? > >Alternately, anyone know a good place to find one? It's a 16 bit >(2x8) cable/pod assembly that goes for $300 new on Ebay. The pod >needed (if you happen to have some extra lying about) is HP Agilent >54620-61801. > >-Adam There are series resistors at the probe end - I'm fairly sure they are 90K. May also be a small (few pf) cap across the resistor. I'm fairly sure the cable assy is the same as used on the 1650/51 logic analysers- you may get a whole analyser with cables for $300! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist