The measurements scenario with the RTL-SDR dongles, antennas and a PC.
SDR-UAM-I: A low-cost spectrum analyzer.
Airspy Mini SDR – Airspy.US
Modifying an RTL-SDR by adding a Diplexer to receive HF and VHF/UHF
Running an RTL-SDR On up to 100 Meters of USB Ethernet Extension Cable
Making it rain with Software Defined Radio - Spurious Emissions
GPU Accelerated RTL-SDR Radio Interferometer Code For Radio Astronomy
Using the RTL-SDR as a Transmitter
EM-Sense