over the holiday time i spent some more time on my project ...
SDR UPLINK TX .... with LIMESDR.
(maybe possible also with ADALM PLUTO...needs mod with TCXO..pse give information about).
For the test i use as SDR-TX the ODROID XU4Q and the LIMESDR-USB with an GNURADIO FLOWGRAPH. With this setup it is possible to TRANSMIT LIVE (delay around 0.5s) from an Mic connected on an USB soundcard (SB16).
Some more testsignals (audio loop, cw loop,pskloop...) were generated in the GNURADIO FLOWGRAPH. Digital Modes are possible via virtual soundcards in pulseaudio direct on the system.
The OS is Ubuntu Mate 18.04 armhf for Odroid XU4.
Monitor receiver is on an other PC with the ADALM-PLUTO and GQRX. CPU load of the ODROID is shown right in the TOP of the VNC-window (Odroid XU4)
This is a first test an 2402MHZ and i used an DUMMYLOAD in the SHACK...!!
the actual results can be seen in the video....
BEST WISHES TO ALL for 2019
73 de DG0OPK