John it did indeed go to 1us not sure when. Definity a requirement in Europe. But the Austrons and SRS demand it. Not sure the old Austron 2000 did. But that was a pain to use. Actually useful to have a scope while setting it up.
I also designed my first LORAN C receiver but for frequency locking something like 1985 or earlier. It did use cmos chips but not a micro. Because its job was to lock an oscillator I only needed one master and no slaves. Much of my knowledge came from a fellow named Ralph Burhans. Regards Paul WB8TSL I ran into the A&B group when building the loran c simulator. ooops. Regards Paul WB8TSL On Fri, Aug 7, 2020 at 4:24 PM John Ponsonby <[email protected]> wrote: > When I designed and built my LORAN-C receiver, for navigation not precise > time, it was my understanding that all GRI's (Group Repetition Intervals) > were expressed as four digit numbers. I designed my receiver accordingly. > The number was the repetition time in units of 10 microsecs. This is the > period of one cycle of the RF signal. so the RF is coherent from group to > group. (The groups are not all identical. There are alternately A groups > and B groups.) I notice that in the present discussion the GRI is given to > five digits. Does any one know if the change to five digits, which are > presumably the time in microsec, is so to speak official? > > John P > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
