> With version 2.x firmware
> the Orion
> started using an IF AGC detection scheme which has fewer
> general design 'issues'
> than the AGC derived from audio detection used in version
> 1.x. Because
> of this change the notch function must remain outside the AGC loop.
I admit to being slow, but perhaps someone could explain in simple words why
this is the case. Is it unique to a DSP radio? Every analog radio I've
ever used that has a "notch" has it INSIDE the AGC loop, somewhere prior to
the point where the AGC control signal is developed.
Which is the whole point -- that which thou doest notch out shouldst not
affect thine AGC or lower thy receiver gain.
Grant/NQ5T
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