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f1
f2
a1
G
PIP3
Untrusted!
Untrusted!
Untrusted!
Trusted!
Trusted!
a3
a2
Source 2
Source 1
ΔlogPIMD3≈Δa3[dB]
IMD3 source is BEFORE the attenuator (amplifier)
ΔlogPIMD3≈3Δa3[dB]
IMD3 source is AFTER the attenuator (SA)
Adjusting
the attenuation
Δa3 [dB]