QUOTE(Baronic @ Jan 4 2007, 10:53 PM)
yeah just connect and its free from there on in.
16 channel and 32 channel is believe is the number of sattelites at a time it can detect max. which in my opinion not much diff also. thats cuz u connect also can normally detect 5-8 onli i think. which is more than enuf.
GPS started off with only 24 satellites orbiting the earth (dunno how many now), put up there by the US Army, so at any one time any one location you can get only a number of satellites visible from the location. Accuracy depends on the number of satellites the receiver can detect based on its sensitivity (SIRF III chip at least!) AND the strength of signals it can detect. It'll need at 3 sets of signals with strength of above 50% to triangulate its 3D location (coordinates AND levitation). The stronger the strength of its signals, the higher the accuracy (currently 3 meters radius the best you can get). The more channels it supports means that it can continuously get a lock as it moves.
QUOTE(liewss80 @ Jan 5 2007, 01:54 AM)
as long as can c sky, no prob. if in tunnel, no matter how many channels also no use. cos no signal.
Between the receiver and the satellites lies many other things, not only tunnels and buildings, sometimes you can be at a open sky location and yet unable to get a lock on your location due to interference, weather conditions, and also if you are constantly moving, you wont be able to lock on your location if you just switched it on (if moving, you'll need to get a lock on location before you move, thats where the importance of "cold start" comes in, or "warm start" if that was the last location on the receiver was before it was switched off the last time).