[Elecraft] KX3 Programming Passband and Passband offset ?

[Brian Waterworth]

Thank you for the additional details.  The commands you wrote about in this
thread should give you what you want.  Have you had a chance to try them
out yet to confirm?  I haven't tried myself, just read the programmer's ref
guide (E19) and drew it out on a piece of paper so I could see the
bandwidths and how they shift.  I always struggle with which way to shift.
Even wsjtx split mode gets me second guessing the direction of the shift.
Luckily the app knows what to do :-).

Is your motivation for reducing the noise above 2.5Khz due to unwanted AGC
action from these strong signals?  We can take this part of the
conversation off-list if you'd like.

regards,
Brian
VE3IBW

On Sun, Apr 28, 2019 at 11:58 AM John Newgas <g7ltq at newgas.net> wrote:

> Bottom end of the audio passband at 500 because all heartbeats etc. should
> normally be in 500-1000Hz range.  As to bandwidth, I am in a very noisy
> City environment in London.  My antenna is a 12m  end fed wire tied to the
> top of a wooden fence - and half of that length is shielded as it is
> between two houses.
>
> A narrow bandwidth simply keeps the noise levels down, but will still
> capture virtually all the JS8Call traffic.  80m is unusable unless I can
> narrow the passband right down.
>
> John G7LTQ
>
> > On 28 Apr 2019, at 16:43, Brian Waterworth <brian.waterworth at gmail.com>
> wrote:
> >
> > Hi John,
> >
> > Would you elaborate as to why you want to have 500-2500hz as your audio
> passband width?  I have my KX3 BW = 4.00 and run split mode with JS8Call
> and WSJT-X.  That keeps my signal in the sweet spot and gives me a view to
> other signals up past 2500Hz in case I want to try to work them.
> >
> > regards,
> > Brian
> > VE3IBW
> >
> > On Sun, Apr 28, 2019 at 6:41 AM John Newgas <g7ltq at newgas.net <mailto:
> g7ltq at newgas.net>> wrote:
> > My KX3 is often operated remotely via a Raspberry Pi and VNC - mainly
> for digital working with JS8Call and WSJT-X.
> > I’ve set up a set of programmed instructions that I run before each
> session to make sure that everything is set up correctly such as Data Mode
> A, Power Output, Microphone and Audio Settings.
> >
> > I can see how to set the Bandwidth (Passband Tuning ) using the BW
> Command but  I want to have a defined bandwidth of 500 to 2500 Hz,   Is the
> right way to use
> >  BW 20 ; IS 1500 ;    ?  Or is there a better way to adjust the PassBand
> offset ?
> >
> > John G7LTQ
> >
>
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