[time-nuts] GPS Weekly Rollover Fail

[Bob kb8tq]

Hi

From what I can see, you can send it a command that puts a new “oldest date”
number into flash. Since it also tracks Glonass and Galileo, that will stretch out the
time before you *need* to do something (like into the next century). They also have 
the “no dates before the firmware was issued” check.  There may be other date 
checks in there. Those are just what I’ve found so far.

It also is likely that the “new” GPS sats will be flying within 19 years. That will add 
more bits to the GPS time fields. Who knows if the “modern” modules already handle 
those bits or not ….

Bob

> On Feb 5, 2019, at 5:23 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> 
> 
> kb8tq at n1k.org said:
>> The F9P has multiple cross checks, traps, and even a user configurable
>> “oldest  possible date” entry.  
> 
> Neat/thanks.
> 
> Is that stored in flash, or lost on power cycle?
> 
> If it's in flash, I can "fix" things for another 20 years by extracting the 
> device from its box, taking it to a bench setup, running a flash-update 
> program, then reassembling things.  As ugly as that is, it may be simpler than 
> updating the firmware in the box.
> 
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
> 
> 
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