GP-31 date correction

[yankeebravo]

Hello to the group
How can I correct the date information on navigation display, mine is allways on 24 dez 99.
It change day by day, but I cant correct the mounth and year
Thanks

Ivan

 

[Johnny Electron]

The size of time information (week number) transmitted by the GPS satellites is 10 BIT. The output range of week number is from 0 to 1023. The week number returns to 0 after 1024 weeks as the GPS system is designed. It is called “GPS week number rollover”. All GPS/GNSS receivers including FURUNOs have programming to convert from GPS Sat system week number (which is transmitted from the GPS satellites) to current date and time.
The GP31 is an older unit and has encountered this GPS rollover. It can still function and provide GPS but the time and date can not be changed due to the age and the GPS SAT system design.

 

[yankeebravo]

Thanks Johnny. Very clear to me...