Recently we had a thread about oscillator accuracy. People wanting to use TXCO oscillators might like to look at a Maxim Engineering note called "Exploiting the versatility of the DS4000 digitally controlled, temperature compensated crystal oscillator in GPS applications". I have a hard copy just arrived on my desk today, but I believe these are available on the Maxim web site. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body