Good to learn something from you today Don,
Thanks 73, Leroy AB7CE
-----Original Message-----
From: Don Wilhelm
Sent: Tuesday, March 31, 2020 9:36 PM
To: [email protected]
Subject: Re: [Elecraft] K3 SSB filters
Hopefully that we will remember that the DSP filter skirts are steeper
than the crystal filter skirts, so judicious use of the HiCut and LoCut
will provide us with a better passband than narrow roofing filters.
What the roofing filters will do is keep the receiver from reducing the
hardware AGC for stations which are within the roofing filter passband.
It takes adjacent signals in excess of S-9 +30 for the adjacent signal
to activate the hardware AGC (which protects the front end DAC from
overload). If the interfering station does not exceed that threshold,
then the DSP filters will take care of it, and the need for more narrow
roofing filters is superfluous.
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