> -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Bob Camp > Sent: Wednesday, February 17, 2010 1:57 PM > To: 'Discussion of precise time and frequency measurement' > Subject: Re: [time-nuts] DMTD to MMTD > > Hi > > Thanks for the quick response. > > The impression I've always had of that system is that it is comparing the > sources two at a time. They can select between a number of sources, but only > one pair is looked at. >
It basically timestamps transitions on all 8 inputs. The post processing software that looks a the timestamps is what selects either 1 channel (single mixer+offset generator) or 2 channels (dual mixer time difference) The counters in the FPGA are running at 100 MHz, so they have a basic resolution of 10 ns. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
