Unruh wrote: [] >> The newer "x" version appears to be a lot more sensitive, at the >> expense of somewhat higher current consumption. You can tell the >> LVC version what sentences to send. Better check the technical spec >> to see what the USB one can be told to do: >> http://www.garmin.com/manuals/GPS18x_TechnicalSpecifications.pdf > > Unfortnately, the LVC is a serial port output, plus a PPS output. The > USB > version has no PPS output and is liable to have pretty bad timing > (where good=usec).
.. which is why I suggested checking in the manual as to whether the output could be set to be a better determined length, which is what the OP requested. It may be he /has/ to use USB. By the way, while timing on USB may not be wonderful, I have an application receiving some 40GB per day over USB, in fairly small packets from a DVB satellite feed, and the buffering isn't that great (a few kilobytes, I believe). Most often it's lossless, but it may be that the error-correction in the stream-to-file software does a good job! <G> Cheers, David _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions