i don't know when the software came out but tech support at cobham emailed it to me and we installed it.  i'm not sure if that was a great idea as shortly after that one screen went belly up requiring an "overhaul" and i never had a problem with the gps signal before.  perhaps the software made the units too sensitive.  i should mention that the gps signal on the cnx80 and my ipad foreflight was not lost- only the cheltons intermittently and i have not seen it lost on the ground only in flight temporarily.  i should  also mention during the time of overhaul i had a gtx 327 transponder installed in the panel and the remote sl70 removed so lots of "minor" wiring changes.  however, i was told that the cheltons are much more sensitve and require a "better signal" than typical gps.  i wonder if the update just made mine too sensitive but we'll be troubleshooting and if/when we figure it out i'll let you know.  one fellow told me he saw the gps signal totally disappear requiring a new receiver so maybe that's it though intermittent problems are always more dfficult to track down.

thanks,

david weinsweig
304-633-5221
weinsweigd@gmail.com
n750dw propjet