Avidyne avionics are known to be affected by the rollover, causing the loss of some displayed data.
https://www.avidyne.com/files/downloads/606-00182-019.pdf On Thu, Mar 28, 2019 at 3:04 PM Mark Sims <hol...@hotmail.com> wrote: > > I doubt that any GPS receivers will be newly affected on April 6. Some very > early receivers were hit on the first GPS rollover, but those made since then > usually have a 1024 week compensation built in based upon the firmware > creation date. Those rollover 1024 weeks from that date and start sending > incorrect dates at other places in the 1024 week cycle. Some receivers even > let you force the rollover week. > > > I have a Z3816A that’s showing a yellow “ro” next to the date in LH and is > > 18 seconds ahead of a Motorola 12 channel > > If Lady Heather sees a date earlier than a set year (currently 2017), it > assumes the GPS device has rollover issues and adds 1024 weeks to correct the > date and shows the "ro" flag. > > As far as the 18 second time difference, one of the devices is configured to > show GPS time and the other is set for UTC time. At the top right corner of > the screen it should say either "UTC time OK" or "GPS time OK" (as long as > the device has a valid time). The TG and TU commands can switch between GPS > and UTC time displays. Some receivers have firmware commands to switch > between the two. For the others, Heather does the conversion in software > using the "UTC offset" (i.e. leapsecond count) value. Many receivers send > this offset. If it does not, the user can set the value. And if no value > is available Heather makes a best guess as to what the value might be (and > shows it in RED). The guessed value is rather prone to errors, but is better > than nothing. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
