Hi Walter, Thanks for the info, I'll add the correct filters for LSB. I'm not using it for Taurus-1, this is still experimental and not ready to be deployed on anything serious. For LEO sattelite usage on FreeDV, I need to add Doppler tracking like I have for the other modes.
This is a standalone GUI built on GNU radio and Qt for my own purposes and not included on any live CD called qradiolink. I test it primarily on the PlutoSDR which is VHF and above, the RTL-SDR and the LimeSDR mini. Other devices might work with it as well, like the USRP which I don't test on anymore since it always works no matter what stupid things I do with it. I'm not much of an HF user but it should work there with the right hardware. Regards, Adrian On September 21, 2019 3:14:37 PM UTC, walt...@k5wh.net wrote: >Adria, > > > >Yes we do use FreeDV on LSB for frequencies below 10mhz. > > > >Perhaps I did not understand your setup completely, but it seems to be >using UHF that your transmitting on. > > > >Are you setting this up for the Taurus-1 satellite? Ie.. UHF FM uplink >and ssb codec-2 downlink? > > > >I have seen this with the LiveCD for the downlink using the Ubuntu >disk, but I have not seen it being done with the setup that your using >there. > > > >So it looks very interesting if it’s an alternative to that. > > > >If your only trying to use it on UHF, perhaps the 2400B mode of FreeDV >may work better for you. > > > >All the best. > > > > > >Walter/K5WH > > > >From: Adrian Musceac <kanto...@gmail.com> >Sent: Saturday, September 21, 2019 8:04 AM >To: freetel-codec2@lists.sourceforge.net >Subject: [Freetel-codec2] FreeDV SDR transmitter and receiver with GNU >radio > > > >Hi, > >I got FreeDV 1600 and 700C working with the PlutoSDR and the RTL-SDR. >if anybody is interested: https://www.youtube.com/watch?v=s63SSf9Yhjg > >Many thanks to A. Maitland Bottoms who maintains the GNU radio FreeDV >module. > >I feel that either I'm not setting the input gain into FreeDV correctly >or I'm not operating the squelch in a sensible way because I'm getting >a lot of R2D2. In floating point scale of -1.0 to 1.0, what is the >correct value to put into the FreeDV demodulator? > >With mode 700D, I'm getting a segfault in the LDPC encoder >(unfortunately only have dissasembler now because I didn't install the >debug symbols yet). > >Not sure if this is from the Debian version or not so not sure who to >raise the bug with. > >Do people operate FreeDV on LSB below 10 MHz or is it always USB? I 'd >like to know in order to set the filter correctly. > >I think the LimeSDR-mini should work as well but I didn't have the time >to test it yet. If anybody owns other device like the HackRF or >RedPitaya, perhaps they could try and see if it works properly with >them. > > > >Regards, > >Adrian
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