BLE network hardening tests , blocking PAwR

Hi,

I am trying to build a BLE PAwR network jammer for wireless network hardening. I have three nrf52840  transmitting on channels 37,38 and 39, which blocks nodes from joining the network as expected. 

Now, I would like to block nodes after the network is established. Do I need a wideband jammer for this, or is it possible to reuse the same setup ?

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