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 radio traffic intended for other planes. The SELCAL tones are normally transmitted in AM mode (not SSB) to ensure they can be decoded properly.
Features:
- 2x2 Aviation SELCAL encoder (ARINC-714 standard or ICAO Annex 10)
- Up to 64 presets in Version 3.
- 32 tones per ARINC 714A Mark 4 in Version 4.1.
- Log file of all code transmissions (CSV text format) with date and time
- VOX or serial/USB control with ComTekk CRF Universal Radio Interface
- Push-To-Talk (PTT) for voice comms
- Programmable Transmit delay and Output level controls
- Control access to preferences with security settings
- 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 Audio Sampling Rate: | 11,025 Samples / Sec. |
Frequency Accuracy: |
0.1% with ComTekk CRF Radio Interface |
| Tone durations: | 1.0 Second, 200mS gap |
| Calibration tone : | 1,000 Hz sine wave |
| Protocol: | ICAO Annex-10 / ARINC-714A Mark 4 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.