Posted by
Buck - k4ia on
Sep 18, 2007; 9:42pm
URL: http://elecraft.85.s1.nabble.com/K3-2-7-k-Filter-vs-2-8-k-tp453169p453170.html
In a message dated 9/18/2007 4:36:17 P.M. Eastern Daylight Time,
[hidden email] writes:
If the roofing filter is able to knock down the
unwanted signal to a level the DSP can handle, then the DSP will not
overload and the DSP itself will provide great ultimate rejection.
Well, sorta kinda. If the unwanted signal gets in and pumps the AGC, then
the DSP might knock down the signal but won't be able to do anything about the
AGC pumping. Then, you won't hear the signal if it is weak. That is the
whole issue of the DSP being in or out of the AGC loop and it generated a
mountain of controversy with the Orion when TT moved the DSP to within the loop.
I believe I read the K3 did not follow that mistake but a little
clarification from the gurus who know a whole lot more about this issue would be helpful.
Craig "Buck"
k4ia
Fredericksburg, Virginia USA
************************************** See what's new at
http://www.aol.com_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help:
http://mailman.qth.net/subscribers.htmElecraft web page:
http://www.elecraft.com