Every time I switch on my Thunderbolt (cold start) Lady Heather tells me that
there are no
almanac data. It takes a few tens of minutes before they are collected again.
I was under the impression that TB had some sort of non volatile memory, and it
must have it,
as it is capable of remembering
Hi Alberto,
Why almanac data are not kept ? Not enough space in that non volatile
memory ?
the thunderbolt is meant for permanent installation in mobile base
stations where power outages are pretty rare, so I guess the designers
didn't see it worthwhile.
Chris
At 10:49 AM 6/13/2011, Alberto di Bene wrote...
Why almanac data are not kept ? Not enough space in that non volatile
memory ?
Flash and EEPROMs have a limited number of write cycles available. For
a timing receiver, position changes rarely - almanac data changes
frequently.
EEPROM's do have a finite number of write cycles to any particular memory
location, but it's about 100,000 or more. That's 11 years worth if written
to once an hour round the clock (the same location in memory, that is).
This is probably not the issue. I personally never noticed but then again,
On 06/13/2011 06:02 PM, Christian Vogel wrote:
Hi Alberto,
Why almanac data are not kept ? Not enough space in that non volatile
memory ?
the thunderbolt is meant for permanent installation in mobile base
stations where power outages are pretty rare, so I guess the designers
didn't see it
