An interesting new development has sprung out of the wonderful Osmocom project: a low-cost, wide bandwidth SDR transmitter that works with GNURadio. How low cost? How about $10? This is all possible thanks to the wonderful work of Steve Markgraf, an Osmocomm developer who found that when properly coerced, a cheap USB3.0 to VGA adapter will output raw samples straight from its RGB output lines. While the base sample rate of the dongle, using the FL2000dx VGA chip, has a normal max frequency bandwidth of 150MHz, it was found that since the output is essentially unfiltered valid signals can be
Read On