Sandbox:SITOR-A
SITOR-A | SITOR-B Vorlage:Playground:Signal
SITOR-A is one of two modes of SITOR, which stands for Simplex Teletype Over Radio. Based on CCIR 476-4. It was formerly used to transmit maritime short messages, however the maritime industry is gradually moving away from using this mode in favor of PACTOR. AMTOR is a type of SITOR used by amateur radio operators.
SITOR-A has been seed with shifts of 170 Hz, 300 Hz, 400 Hz, and 850 Hz. SITOR-A is most commonly used with 170 Hz shift and 100 Bd.
Frequencies
One of the biggest users of SITOR-A is not a maritime service - it's the Egyptian Embassy/MFA Cairo. The current version of the 2014 Digital Digest by Mike Chace-Ortiz (Spectrum Monitor editor) has an extensive description of this network. Also see the Utility DXers Forum on Groups.io for current frequency information
Video Examples
<html5media>https://www.youtube.com/watch?v=_fr0_krtass&t</html5media>
Empfang und Decoden eines SITOR-A Signals ("RCVB" eine ägyptische Station)
Decoding Software
- Hobby Level Software
- Professional Equipment/Software
- Go2decode
- Go2Monitor
- Hoka Code 3-32P
- Hoka 300-32
- Hoka 300-32P
- Krypto500
- Wavecom W-Code
- Wavecom W-Spectra
- WinRadio Universal FSK Decoder