10/3/2023 0 Comments Fldigi on raspberry pi![]() Problem: I see no RF power out in USB or USB-D using flrig on aĭetail: With just flrig open and Mode set to AM I can press PTT and To: No RF power out in USB or USB-D using flrig & fldigi I fixed it by doing a factory reset and installing the latest firmware from Icom. ![]() I'm not sure whether the problem came from flrig or RF Systems' programming software, but I also had a dead modulator, so it would send unmodulated carrier in AM or FM modes, and nothing in USB or LSB modes (simce they are suppressed carrier). Click on one of the peaks in the waterfall and you should start to decode the PSK31 signal.Sounds like the problem I had with my IC-7100. ![]() The waterfall on the bottom left of the screen should come to life. Click on the square button labelled "RX" located left of center. Launch the "LinPSK" application and maximize the window so that it occupies the whole screen. The above procedure assumes that the on-board audio device is designated "card 0" and that the USB audio device is designated "card 1", but this should be the case as long as you do not have any other audio devices connected to your Raspberry Pi.Ĭonnect the audio output from your transceiver to the input of the the USB audio device via a suitable isolating interface and tune the transceiver to a PSK31 signal. Once you have saved and closed the ".asoundrc" file the "LinPSK" application should have access to the USB audio device. Have a look at this post if you need help creating or editing files. If there already is a file called ".asoundrc" in the "/home/pi" folder then you should append the above text to the end of the existing file. To save you having to type in all the above text, there is a file called "asoundrc" in the folder "/usr/share/doc/linpsk" which you can copy over to the "/home/pi" folder, edit and rename as ".asoundrc". To make the USB audio device available to "LinPSK" you need to create a file called ".asoundrc" in the "/home/pi" folder containing the following text: To download and install LinPSK open a LXTerminal window and type the following and press ~ $ sudo apt-get install linpsk_ ![]() The one I have had the most success with is called "LinPSK". Searching the repository for "PSK31" or "amateur radio" yields a few alternatives and I have been experimenting with some of these applications. I have tried running "Fldigi" on the Raspberry Pi and whilst it does run, I feel that it is just too demanding on the modest resources of the Raspberry Pi. If you do an internet search for "Raspberry Pi PSK31" you will get a few results, most of which bemoan the Raspberry Pi's lack of processor power for running " Fldigi" which is probably the most popular Linux application for PSK31. The possibility of using the Raspberry Pi for operating PSK31 has intrigued me because it would offer a low cost, low power, silent and potentially mobile station setup - the only other alternative is to use a desktop or laptop computer. To do this requires an audio input to and output from the Raspberry Pi (see my previous post) and a suitable application to encode and decode the PSK31 signal, as well as a radio transceiver and antenna. As I mentioned in my last post, I am a radio amateur and I'm interested in using the Raspberry Pi to operate using various digital modes, including PSK31.
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