# Radio Teletype (RTTY)

**RTTYRadio TeleTYpe** (Also known as Baudot or ITA2) uses the Baudot 5-bit alphabet with FSKFrequency-Shift Keying to send text messages over the shortwave. This mode is gradually dying out in favor of more robust modes like PSK31 in the amateur service. Uses the ITA-2 alphabet (Commonly known as Baudot, derived from the Murray code). Apart from occasional ham use, the only other known user is the Deutscher Wetterdienst (German Meteorological Service).

There are many modes that sound like Baudot, but in fact aren't. For example, the Russians use a 50 baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. /200 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). system that to the ear, sounds like Baudot. Closer examination with tools for viewing waveforms and other data will show this clearly.

Among amateur radio, the most common default mode of RTTYRadio TeleTYpe is 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). with 45.45Bd.

## Samples[edit]

45.45 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

75 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

45.45 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

75 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

45.45 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

75 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

45.45 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

75 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |
100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. |

## Frequencies[edit]

### Commercial and Maritime[edit]

- Deutscher Wetterdienst (German Weather Service) schedule (PDF)
- Station KPH's frequencies and schedule

### Amateur Radio[edit]

Amateur RTTYRadio TeleTYpe radio bands can be found here.

## Decoding Software[edit]

- Hobby Level Software

- CocoaModem (for Macs)
- Fldigi
- JVComm32
- MixW
- Mscan
- MultiMode (for Macs)
- MultiPSK
- SDRUno Baudot Plugin
- SeaTTY
- Sorcerer
- WinWarbler

- Professional Equipment/Software

- go2DECODE
- go2MONITOR
- Radiocom6
- Wavecom W-Code
- Wavecom W-Spectra
- WinRadio Universal FSK Decoder
- Zorns Lemma German

## Video Examples[edit]

## Additional Links[edit]

- Voice Frequency Telegraph (VFT)
- Radioteletype on Wikipedia
- Pinneberg RTTY Live at WebSDR Univ. of Twente
- W1AW digital transmissions
- RadioRaft BAUDOT
- Scancat info
- MultiPSK RTTY