[Elecraft] fldigi and flrig and the filters of K3 and KX3

[Nate Bargmann]

* On 2014 02 Jun 13:52 -0500, jsdroyster at nc.rr.com wrote:
> So here is the question:  
> In PSK I grasp that the bandwidth on the KX3 or K3 is set wide to establish the waterfall.
> For RTTY I understand that the radio has the special dual PB filter, BUT do I use it OR do I still set the wide filter for the waterfall?

Fldigi has its own DSP filtering and doesn't really care what the K3's
IF bandwidth is so long as it's wide enough to allow both mark and space
tones through; approximately 200 Hz or so.  In a RTTY contest the use of
a narrower bandwidth can help when dealing with stronger adjacent
signals.  Start wide and narrow up as you see fit.

> (I tried using the RTTY filter of the radio and the waterfall was 2 narrow blue tracks.)
> 
> If RTTY usually is at 14080 and above then do I want the waterfall to start lower than that?

Be on lower sideband 45 baud.  RTTY often spreads out over the top end
of the digital portion of the band and in a contest down well into the
traditionally CW portion.  RTTY is not usually crowded into 3 to 4 kHz
of spectrum as PSK31 mostly is.

> Bumbling along on the digital learning curve...

Keep on learning!  Make copious notes and plenty of QSOs.  Have fun.

73, Nate N0NB

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