So I suspect the reason you do not find AFSK in Fldigi is that it's neither popular (or really effective) on HF, and it's not a chat mode. These chat modes allow multiple operators to take part in a net. In this context, we are talking about modes used on the HF (high frequency) bands, specifically chat modes, those used to have a regular conversation in a similar way to voice or Morse, where one operator talks for a minute or two, then another does the same. Since the mode is typically deployed with no FEC at all, it's usual for any HF packet frequencies to be clogged with nothing but retransmit attempts.įldigi is also focused on "chat" modes, like PSK31. A few people do it for sure, but having tried it personally I can tell you it's not a very robust mode with all the noise and fading in a typical HF channel. Fldigi operates (as does most similar software) in conjunction with a conventional HF SSB radio transceiver, and uses the PC sound card as the main means of input from the radio, and output to the radio.ĪFSK, as used by APRS and packet radio, is not very popular on HF. From the beginner's guide:įldigi is a computer program intended for Amateur Radio Digital Modes operation using a PC (Personal Computer). Fldigi is largely intended for HF operation. Call for participation Frysian 11 cities contest.
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