I found a video with a test that i did to a Mineoro PDC210 super before 3 years (little time before i sell it). At test i give signal from a generator to an external coil and i see if the mineoro receives tis gignal. The signal was from 0.1Hz to 2.1 Mhz.
Video is 69 Mb so i can't upload it here. If Qiaozhi like i can post it to him to to attach here
Regards