Appendix
A. Troubleshooting FAQ
Click on highlighted links for more details about a particular subject.
1. Everything appears to be working, but tones are not being decoded by the aircraft.
If not using the ComTekk Radio Interface, it's possibile your sound device is off-frequency due to internal clock error. This is normally not required, but can be compensated by running the built-in Calibration. It is critical to calibrate the software for the particular sound device you are using. Be sure to read and follow the instructions in the Calibration section.
Also be sure radio is tuned to the correct frequency and transmitting SELCAL tones in AM mode (not SSB).
2. After installing the new version, a message pops up when program is launched "Couldn't rename old settings file."
This could happen on Windows 7 or Vista in certain circumstances. Browse to the program folder, usually C:/Program Files/ComTekk/CTSelcal/ Then rename or delete the file CTSelcal.INI.
<< This section will be updated as user reports are submitted. >>
B. Technical Support
Registered ComTekk users are entitled to twelve (12) months email technical support at no charge.
Telephone support is available for US$75.00 per incident.
Technical support issues should be directed to:
Email: