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<!---
<span style="font-size: 14pt">[[SITOR-A]] | [[SITOR-B]]</span>
<span style="font-size: 14pt">[[SITOR-A]] | [[SITOR-B]]</span>
{{Playground:Signal
{{Signal
| Titel= SITOR-A
|Title=SITOR-A
| Bild= SITOR-A.jpg
|Picture=SITOR-A.jpg
| Frequenzen= 3 MHz,30 MHz
|Frequencies=3 MHz,30 MHz
| Mode= USB
|Mode=USB
| Modulation= FSK
|Modulation=FSK
| ACF= 450 ms
|ACF=450 ms
| Location= Worldwide
|Bandwidth=350 Hz
| Audio= ARQ-AMTOR.mp3
|Location=Worldwide
| Beschreibung= SITOR-A (Also known as AMTOR-A) is one of two modes of SITOR, which stands for Simplex Teletype Over Radio.
|Signal file=ARQ-AMTOR.mp3
|Signal description=SITOR-A (Also known as AMTOR-A) is one of two modes of SITOR, which stands for Simplex Teletype Over Radio.
|Additional categories=Marine,Digital,HF,Active
}}
}}
--->
 
'''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''' 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.


Version vom 26. März 2018, 05:32 Uhr

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

Additional Links

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