On Tue, 24 Jun 2008 22:54:53 GMT, Sam Wormley
wrote:

Adrian Jansen wrote:


But it does have very impressive sensitivity, 189 db, against more
typical 150-160 db of most GPS units. If they actually achieve that, it
is pretty useful in many applications.


dBw? dBm?

==============
-189dBW tracking
-185dBW acquisition
(hot or assisted, Ephemeris available)
-174dBW unassisted acquisition
(Ephemeris decoded)
==============
Sirf 3 is -159 dBm.
==============
What's the difference between the 2 specs?