[Elecraft] Glad you are OK

[lmarion]

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: elecraft at mailman.qth.net 
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.