Features & Specifications
Ver. 2.02
1. Features
ComTekk 2-Tone Decoder makes use of the computer sound card and software DSP (Digital Signal Processing) techniques to listen for audio tones and instantly display the frequencies of a single or two-tone paging sequence, such as those used by emergency services dispatchers to alert fire and EMS personnel. These signals are commonly referred to as "alarms", "alerts" or "tone-outs".
ComTekk 2-Tone Decoder will listen for any sustained tone signal and display the frequency or frequencies. After about 5 seconds, the decoder will reset and wait for the next signal.
Additional Features:
- Audio squelch
- Trigger delay
- VU meter
- Sound card Auto-calibration
- Data Hold & Clear
- Data logging (CSV file)
- Audio recording
- Single and 2-tone decoding & logging
- Optional serial port control for external relay (bell, lights, etc.)
For detailed operating instructions, proceed to Using the 2-Tone Decoder.
2. Specifications
NOTE: These specifications apply only to the ComTekk 2-Tone Decoder software. Hardware specifications will vary between different computers and sound devices.
| Decoder Frequency Response: | 200Hz ~ 4 KHz |
| Input Sampling Rate: | 11.025 KHz |
Accuracy: |
+/- 2.7Hz using Fourier approximation |
| Min. detectable tone duration: |
approx. 400 mS |
| Min. frequency change between tones: | 10 Hz |
| Calibration tone : | 1,000 Hz reference (WAV) |
| WAV Recording Format : | MPEG-3, 8kbps, mono, 8Khz sampling rate |
| Relay hold time (requires Relay Control option) | 1 - 99 seconds |
Disclaimer:
Actual performace 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 mis-use of any software products.