NATEL
From Signal Identification Wiki
 | |
|---|---|
| Frequencies | 30 MHz,800 MHz |
| Frequency Range | 30 MHz - 800 MHz |
| Mode | NFM |
| Modulation | MFSK |
| ACF | — |
| Emission Designator | — |
| Bandwidth | 5 kHz |
| Location | Worldwide |
| Short Description | NATEL is a 5-tone selcall mode defined by Scandinavian National Telephone recommendations. |
| I/Q Raw Recording | — |
| Audio Sample | |
NATEL is a 5-tone selcall mode defined by Scandinavian National Telephone recommendations.
Selcall (selective calling) is a type of squelch protocol used in radio communications systems, in which transmissions include a brief burst of sequential audio tones. Receivers that are set to respond to the transmitted tone sequence will open their squelch, while others will remain muted.
NATEL has 15 tones to choose from, but can send at most 5 tones at a time. Each tone has a duration of 70 msmilliseconds (.001 of a second) per tone. The bursts transmit right before a radio transmission.
| Digit | HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). | Digit | HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). |
|---|---|---|---|
| 0 | 1633 | 8 | 1336 |
| 1 | 631 | 9 | 1477 |
| 2 | 697 | A | 1633 |
| 3 | 770 | B | 600 |
| 4 | 852 | C | 1995 |
| 5 | 941 | D | 2205 |
| 6 | 1040 | E | 1805 |
| 7 | 1209 | Tone Duration | 70 msmilliseconds (.001 of a second) |
Samples[edit]
| NATEL Full Range | NATEL 5-Tones |
|---|---|
 |
|
Decoding Software[edit]
- Hobby Level Software
- Professional Software
Video Examples[edit]
Additional Links[edit]
- shoc Database: NATEL
- WAVECOM Database: NATEL
- NumberOddies.nl Faq, Page 32
- Connect Systems Incorporated Programming Manual with NATEL
