Look there:
http://www.geotech1.com/...s/showthread.php?t=15901This is a screen dump of the PPM/GPS mixer program running in Windows.
This shows an example of replaying a data file captured before in real-time.
The real-time screen looks exactly the same.
The interface to the GPS could be any choice of USB or Bluetooth serial links.
The interface to our PPM is a serial-to-USB cable with TTL level lines on the side of the PPM.
Willy