Features & Specifications
1. Features
ComTekk SELCAL makes use of the computer sound card to generate Aviation SELCAL or selective-calling tones. This is an international signaling protocol used to contact specific aircraft over HF radio while in flight. The SELCAL decoder on board each aircraft is assigned a unique 4-letter code. This allows the receiver audio to be muted until that code is received, alerting the crew there is a radio call for them. This way, they do not have to be distracted by all the radio traffic intended for other planes.
Features:
- 2x2 SELCAL encoder (ARINC-714 standard)
- Transmit delay
- Output level control
- Sound card Auto-calibration
- Code and settings stored after each use
For detailed operating instructions, proceed to Using SELCAL.
2. Specifications
NOTE: These specifications apply only to the ComTekk SELCAL software. Hardware specifications will vary between different computers and sound devices.
| Input/Output Sampling Rate: | 11,025 Samples / Sec. |
Accuracy: |
+/- 2Hz or better using Fourier approximation |
| Tone durations: | 1.25 Sec., 1.0 Sec. |
| Calibration tone : | 1,000 Hz wavetable (WAV) |
| Protocol: | ARINC-714 Standard |
Disclaimer:
Actual performance will vary between different computers and sound cards. The author makes no warranties or guarantees of performance or suitability for any particular purpose, and assumes no liability whatsoever for the use or misuse of any software products. This software has not been certified by the FAA.