[Elecraft] Filter setting

[Chris Kimball]

I'm having confusion about setting the receive filters.  

I'd like to have a 1 kHz wide filter at 1 kHz, that is, with a passband from
500 to 1500 Hz. My rig has a 1 kHz wide roofing filter.  In CW mode I can
manipulate the bandwidth/center frequency controls so that the bandwidth is
1000 Hz and the center frequency is 1000 Hz, and the roofing filter is 1000
Hz.  When I switch to the data mode, however, the lowest center frequency I
can obtain is 1.1 kHz.  The roofing filter is still 1000 Hz.  Even when I
reduce the bandwidth, I can't push it lower.

Must be something obvious!





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