[Elecraft] KX3 roofing filters

[Bill W4ZV]

Jim Dunstan-2 wrote:
> 
> My interpretation is that the "narrow roofing filter option" is variable 
> with 500, 1500, 2700, and 3800 hz steps that follow the DSP filter as it's 
> bandwidth is changed.
> 

These filters are ahead of the DSP at baseband.  They protect the ADC from
overload and should result in better Blocking Dynamic Range (BDR), which has
been a weakness of most SDRs.  

73,  Bill



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