AvCall
Aviation SELCAL-32 Decoder
Features & Specifications
1. Features
ComTekk AvCall makes use of the computer sound card and software DSP (Digital Signal Processing) techniques to decode and instantly display aviation SELCAL codes, a 2+2 tone signaling system used to "page" aircraft, typically via HF radio on overseas flights.
ComTekk AvCall will listen for any SELCAL tone signal and display the code and aircraft information if available. Audio recording may be triggered by tone activation.
Standard Features:
- Decodes: ARINC 714A Mark4 32-tone airborne selective calling, ICAO Annex 10 SELCAL
- Audio squelch
- VU meter
- Sound card calibration
- Data logging (CSV file)
- Built-in log viewer/player
- Tone-activated audio recording
- Serial port control for external relay (RX mode change or device activation)
- Displays registration number for known aircraft in user-created database
- Optional audio-visual alert when a known aircraft SELCAL is decoded
For detailed operating instructions, proceed to Using AvCall.
2. Specifications
NOTE: These specifications apply only to the ComTekk AvCall software. Hardware specifications will vary between different computers and sound devices.
| SELCAL Decoder Standard: | ARINC 714A Mark4 32-tone SELCAL |
| Input Sampling Rate: | 11.025 KHz (8KHz DTMF) |
Max. Error (calibrated sound card) : |
+/- 2.7Hz |
| Min. detectable tone duration: | approx. 400 mS |
| Calibration tone : | 1,000 Hz reference (WAV) |
| WAV Recording Format : | WAV |
| Relay hold time : | 1 - 99 seconds |
Disclaimer:
The author makes no warranties or guarantees of performance or suitability for any particular purpose, and assumes no liability whatsoever for the use or mis-use of any software products.