When you are probing with a loop antenna you can start at large distance (two meters) and reduce the distance if there are no strong signals.
Unless you are exiting the coil with a LOT of power, then you may have to start at larger distance.
To be absolutely sure, you can put a 20 or 30 dB attenuator directly on the RF connector of the tinySA and connect the antenna to the attenuator.
Make sure you never ever touch anything with the telescopic antenna.
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Designer of the tinySA
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