Hi Christoph, The detector for the PAP is not an RMS power detector. It simply accumulates the MSB byte of 8 consecutive samples(see appnote for details) so the detector output will still be time varying even if you keep the input power constant. As a result, the accumulator output can drop below the threshold you set and cause the pap_trig signal to clear. There is a matlab code snippet in the application note you can use to simulate the PAP behavior. Thanks, Eben.
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