K3S Data A Bandwidth

[AL7CR]

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.

Thanks in advance for the help.

AL7CR
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[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.
>

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[AL7CR]

My thanks to Brian and Don for the prompt assistance.  

You are precisely correct, my limits were caused by the dsp settings in
fldigi not those in the K3.   Opening the limits in fldigi allowed a max
bandwidth of 150hz to 2850 hz.  

AL7CR

On Sun, Aug 14, 2016, at 03:57 PM, brian wrote:
> The lower cutoff is defaulted to 200 Hz normally to prevent spillover to
> opposite sideband.
>
> I don't see the upper limit of 2400 here.  It goes all the way out
> slightly beyond 2.7 KHz.
>
> Rig is a K3 with new synthesizers.
> 73 de brian/K3KO
>
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