Question please - is the hardware AGC preceeding the
DSP active only in excessive signal scenerios to keep
the DSP from becoming overloaded

Delete the word "only" and change DSP to ADC you've got that part correctly understood :-) It is used to protect the IF Analog to Digital converter from over ranging under extreme signal conditions.

or can the hardware
AGC be activated at normal signal levels by the K3
firmware to work in conjunction with the AGC algorithm
in the DSP stage?

The DSP can intervene when appropriate.

73,

Lyle KK7P

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