This application is implemented in Python using the wxPython and PySerial packages.
ofilter.py is a simplified version of the AA6E opsk.py program. It only transmits commands to the Orion when a button is pressed. opsk.py repetitvely polls the Orion, which can lead to conflicts if you are running digimode or logging software along with opsk.py.
View or download ofilter.py (October 6, 2007, version 0.1, GPL license).