Juan:
If we have had this discussion before, forgive me. I have misplaced both the interaction and my memory.
What is the generator for the "Pave Paws" source? I ask this because the phase noise for the "Pave Paws" source does not seem to be included in your consideration.
Pave Paws is a pulsed instrument. It will not have its energy concentrated at a single frequency. Its energy will be spread considerably and much of that energy will fall outside of the front end filter of the 70 cm RX. A more realistic test would compute that a -70.2 dBm Pave Paw signal will put (say) -90 dBm inside our passband and further, it will be on/off. Since it is on/off, there will be gaps where the amateur signal is not drastically impacted. A receive system on the ground, necessarily narrow band, will provide processing gain. If we do a good job of writing code, and we do not run out of processing cycles, it would be nice to do pave paws pulse detection and subtraction.
My point here is, the pave paws situation is a great deal more complex than your test is capable of revealing.
Bob