There are several USB oscilloscopes based on the Cypress FX2 + AD9288 (e.g. Hantek 6022BE). So far, most of them were supported by the open source sigrok project, but not for continuous acquisition of samples. This talk will show how those devices can be used to digitize SDR IF signals, and for projects like vhsdecode.

For more information, see:
https://github.com/steve-m/fx2adc

Through a reverse-engineering effort it is possible to (ab)use a combination of cheap USB 3.2 HDMI video grabbers based on the Macrosilicon MS2130 in combination with small FPGA dev boards like the Sipeed Tang nano series (both ~10 USD each) to capture arbitrary data by connecting them via an HDMI cable. This can be used as a low cost, high speed logic analyzer, ADC capture, DIY SDR etc.