This GNU Radio graph was created to do radiated immunity pre-tests using relatively inexpensive equipment and with the ability to access a device under test easily.
Adjust frequency sweep range in Freq Sweeper block to the desired one. Default one is set to 80..1000MHz.
Power is set to almost the maximum level that USRP B210 can deliver, measuring about 18dBm. This should yield field strengths higher than actually required in a desktop size TEM cell. Though, as practice showed, this was required in at least one case to actually trigger any effect in the device under test (which were triggered with only 3V/m in the real test house).
AM modulation parameters can also be adjusted with the sliders.