Thanks...thats the other part of the answer i was looking for. Olin Lathrop wrote:alan smith wrote: > Since I have always used crytals or oscillators, I don't know alot > about the ceramic resonators. First, whats the difference between the > 3 pin and 2 pin devices. I see others have already answered this in detail. > Second, for a colorburst frequency are they > as stable as a crystal? A normal TV colorburst requires higher accuracy than what a resonator can deliver. The circuit also needs to be able to pull the crystal to the received color burst frequency and keep if phase locked to the color burst. Ceramic resonators are not suitable for this job. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --------------------------------- Yahoo! FareChase - Search multiple travel sites in one click. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist