All, I uploaded a new version of SATCONTROL_FCD (V. 0.8.1). The software is using Mike's ExtIO_FCD.dll (must be in the same directory). You can now correct the doppler frequency in Hz steps - so you can also track satellite CW beacons :-) download zip file here: http://www.dk3wn.info/files/SatControl_FCD.zip 73, Mike DK3WN