As of May 31, 2023, we have updated our Code of Conduct.

Questions tagged [rtty]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
5 votes
2 answers

How is a crossed-ellipse display generated from FSK?

What is the algorithm or circuit needed to generate a (vintage?, retro?) crossed-ellipse display from RTTY and/or 2FSK signals? (as per the (obsolete?) questions in some FCC exam pool) (assume ...
hotpaw2's user avatar
  • 13.1k
3 votes
3 answers

Open Source Library for Digital Mode

I want to play a bit more with programming side of digital modes. However, a quick Google search turned up lots of software and some general explanations but no open-source library implementing such a ...
Edgar H's user avatar
  • 185
5 votes
1 answer

BFSK with huge spacing, why?

I recently bought one of the classic USB dongles to experiment with SDR. At 460MHz (Europe, CH) I constantly see many digital transmission that use BFSK. What is strange to me is that: the frequency ...
MarcoM's user avatar
  • 53
2 votes
1 answer

How are symbols encoded in RTTY?

I am looking for RTTY AFSK specifications. I am a little confused when coding the Baudot code; not the normal characters, but the symbols and numbers.
Duarte Ferreira Dias's user avatar
3 votes
1 answer

What is the proper spacing away from a rare RTTY station?

How far away should I transmit from a rare DX station in RTTY? RTTY itself doesn't take that much bandwidth, but I've heard that I should be spaced 2-3 kHz away. Is that true? Thanks!
PearsonArtPhoto's user avatar