> > http://msl.irl.cri.nz/services/time/ > With PAL B as you (and we) have you have to account for the phase > Peter Thanks for that insight Peter. I've got a query into MSL for some further information and practical examples I think the mains cycle thing is a no-goer now after learning that they "try" to keep within +/- 250 cycles per day. To answer Jose - > If you are going to get this up and running what's stopping you from > averaging out 10 days? > This way, you measure about 43,200,000 cycles and divide by 10 to > give you 4,320,000. +/- a bit - I worry about what that "bit" could be. To find out what that "bit" is, you'd need to compare it to a know standard. So why not just cut out the middle man -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist