> Why are you using a MAX232 here? Mine is > connected directly to the ttyS2 lines.
I inserted a level converter to attach the EM-406 GPS receiver also to a PC serial port. If one does not need this, the MAX232 is not required. Bye Ugo --- In [email protected], Cornelius Claussen <[EMAIL PROTECTED]> wrote: > > Hi, > > so it's not only my board ;-) I also have an EM-406, and found this receiver > to be even more problematic: it blinks the red LED (so it gets a fix), but > this fix is sometimes wrong (even though in the NMEA output the receiver > pretends it to be valid). I once had a track that was ok in a diffferential > way (the distances between the points were correct), but the whole track had > an absolute offset of about 30 kilometers south-west... That never happens > with the foxboard switched off. Why are you using a MAX232 here? Mine is > connected directly to the ttyS2 lines. > > Best regards, > > Cornelius > > > Am Dienstag, 8. Januar 2008 schrieb umanfredi: > > Hello, > > > > I had the same problem with an EM-406 GPS board with internal > > antenna. I suppose units with external GPS antennae are more robust > > to the interference, but probably this depends also on were the > > antenna is actually placed. > > > > I too experimentally found that taking away the EM-406 board of 50cm > > or more from the FOX is sufficient to get the GPS fixes again. The > > connection in my case is standard flat telephone wire. The GPS board > > is powered from same supply of the FOX and I use a MAX232 signal > > translator colocated with the FOX to translate GPS low output to std > > RS-232 level. > > > > Regards > > > > Ugo > > >
