Re: [K3] Unanswered Questions ...

Posted by Greg - AB7R on Oct 24, 2007; 9:53pm
URL: http://elecraft.85.s1.nabble.com/K3-Unanswered-Questions-tp455050p455051.html

Joe,

Those measurements are not yet available for the FM filter.  I believe a plot will
be posted on the website when the testing is done.  If not, I'll put the data on
the FAQ.

Elecraft does not recommend using the FM filter in transmit for anything other than
FM.  For ESSB, you will need to use the AM filter.  There will also be a config
menu item for ESSB to select the final TX BW when the AM filter is used.  


-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009

On Wed Oct 24 16:21 , "Joe Subich, W4TV"  sent:

>
>I have not been able to find answers to these two questions
>in the archives, in the K3 FAQ or on the Elecraft web site.
>
>1) What is the bandwidth of the KFL3B-FM filter at -6 dB
>   and -60 dB?  
>
>2) If the KFL3B-FM is installed in a K3 (when available) is
>   a separate AM filter required for AM and/or ESSB transmit?
>   In other words, is the requirement simply that one roofing
>   filter be of sufficient bandwidth to pass the AM/ESSB or
>   is the "proper" bandwidth required to clean up artifacts
>   from the DSP modulation process?
>
>73,
>
>   ... Joe, W4TV
>  
>
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