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7

Fldigi is largely intended for HF operation. From the beginner's guide: Fldigi is a computer program intended for Amateur Radio Digital Modes operation using a PC (Personal Computer). 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 ...


6

I figured it out. In FLDIGI I had video IDS check marked under Configure/IDS/Video. Here is the link to a video on YouTube that clearly explains what I needed to know. https://youtu.be/nwkz0GNpA0I


5

That's a Reed-Solomon identification (RSID). It's purpose is to tell other stations what mode you are using. For PSK it's usually pretty obvious. To disable it, look for the "TxID" button in the upper-right of the window, and click it to toggle it on and off. (As you might imagine, the RxID button toggles the receiving of RSIDs. When it is enabled, Fldigi ...


5

Yes, that's all that's changed. MFSK uses forward error correction, a technique of adding redundant information to the transmitted data so that if some of it is lost, it can be reconstructed from the redundant data. Because errors tend to happen in bursts (static crashes, fast fading, etc), it's common for FEC schemes to also use interleaving, which takes ...


4

Nearly any SSB HF rig will do. You need some way to get audio out of the receiver and into your computer, and out of your computer and into the transmitter. Most modern transceivers provide some kind of connection for this. In a pinch, you can use the headphone and microphone connections. It's also convenient (through not necessary) if Fldigi can key the ...


1

If you don’t see ttyusb0 when you plug the radio into a Linux machine, but the COM port appears when you plug it into a Windows machine, then it sounds like you need to find a Linux driver for the USB-to-serial chipset inside the radio. This means finding out which chipset it uses, then trying to find a driver for that chipset. You can use lsusb to find the ...


1

This question appears to be answered on stack overflow here : https://stackoverflow.com/questions/31603555/unknown-pcm-cards-pcm-rear-pyaudio


1

So as I understand you, the Ettus USRP1 is a software-defined receiver, and HDSDR+ExtIO is software that you are using to control the receiver. So the audio comes from HDSDR running on the computer, and the audio cable loops right back to the computer for fldigi to decode? Interesting! Do you have a hardware attenuator in the audio circuit? If not you're ...


1

The rig only matters a little, more important is getting a good interface to your computer, and making sure that interface can support your rig. The two most common interfaces are SignaLink and the RigBlaster Pro, although there are other options. Basically you figure out how you want to connect the interface to your radio, and then you connect the interface ...


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