by moscow » Tue Nov 16, 2010 12:48 pm
Lag also because of PDOP also. Check the PDOP not more than 5, if more than 10 satellites locked, normally around less than 2. The less the better. PDOP means Positional Dilution Of Precision. The more satellite lock the lower the value. Sometimes the location of satellite makes difference, sometimes window tint also have problem. My colleague faced satellite reception when using V Kool Elite.
I tested both ori and China PND, both also can be fast and sometimes, both also can lag.