This link maybe of interest to people interested in digital PLL's http://www-s.ti.com/sc/psheets/sdla005b/sdla005b.pdf This is a part that has been around for sometime. However the concept is very valid. With clever programming I am sure you can implement a low speed PLL in software. Norman Gillaspie PCS Engineering 325 Sharon Park Dr. #210 Menlo Park, Ca 94025 Tel 650-854-5263 Email norman@pcseng.com All Digital QAM QPSK 8PSK 8VSB MPEG DVB Modulators and RF Converters "PCS Your Connecting Link" www.pcseng.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body