[Elecraft] K3S Data A Bandwidth

[Don Wilhelm]

You have something configured wrong.  It sounds like you may have the 
filter settings incorrect.
Take a look at the filter assignments in K3 Utility.
With only the 2.7kHz filter installed, it should be the only filter that 
you see listed, and its width should be 2.7kHz.  Make sure the offset is 
set to the value on the filer label.
That filter should be enabled for receive in all modes and for CW, DATA 
and SSB transmit.

What happens with the HiCut and LoCut if you set to USB mode?
You should have the same thing in DATA A mode.

In other words, I do not have a definite answer for you, but DATA A does 
not inherently restrict the bandwidth - you should be able to go down to 
50Hz with the LoCut and up to over 3000Hz with HiCut.

73,
Don W3FPR

On 8/14/2016 6:33 PM, AL7CR wrote:
> I am setting up a new K3S-10 equipped with only the 2.7 filter.  It
> appears that the maximum bandwidth for data a mode is 2200 hz with a
> lower limit of 200hz and an upper limit of 2400hz.  I can use the
> bandwidth controls to reduce the bandwidth but they will not lower the
> low cut below 200 nor raise the high cut above 2400.  This is obviously
> happening in the dsp as the cutoffs are hard straight lines in the
> waterfall.
>
> I can not find any info on this in the Cady book, the manual, or the
> list archives.  My question is are these the hard data a bandwidth
> limits or have I missed something in the configuration.
>