> I'm confused, if you can store 250k samples in the PIC, why do > you want to bother with "on the fly" type stuff? When is 250k > samples not enough? >=20 > Alot of the work I do requires at most a few hundred samples Agreed. I don't think I've had an instance when the problem couldn't be solved or identified using for example one slow overall capture at low resolution to see a general pattern and then captures of smaller specific regions or events at higher resolution Note my occassional gif attachments of analyser outputs I've built 2 analysers, both based on relatively slow micros - a 68HC and a 16F84A-10. The micro does not do the capturing. It manages the circuit, which is basically a variable PLL, TTL clocks/latches and ex-mobo fast cache RAM (2 x 8k) Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .