[Elecraft] Data bandwidth behaviour K3s

[Henk de Vries (hdv)]

Hi guys,

I experience a strange bandwidth behaviour when using DATA modes with my new
K3s. (latest firmware) Maybe I am missing something... 

Example:
When I select "data" with the mode switch and have DATA A selected the
bandwidth is approx. 700 Hz.
The bandwidth indicator gives "max. bandwidth" (all the bars).
Given the fact that e.g. WSJT uses wide band audio I change the bandwidth
settings to maximum, being 4 kHz.
(Lo = 0.05, High = 4.05)
The bandwidth indicator still gives "max. bandwidth" (no change to previous
indication)

Now I switch to AFSK A : I get the dual band pass filter for RTTY, as
previously selected. So far, so good.
However, I almost do not hear anything. 
Only when I turn "HI" a little bit back and forth I do get the narrow filter
response in audio.

As a next step I switch back to DATA A. Once again I get the indication of a
large bandwidth in the display, however what I hear is quite narrow. 
Lo is set to 1.15 and High to 1.85. The bandwidth indicator still gives
"max. bandwidth"
I have to adjust shift/width to get the original/wanted 4 kc again.

So I always see the wanted bandwidth in the display, but never hear the
corresponding audio bandwidth right away when switching between DATA A and
AFSK A.
I get the impression that the bandwidth at DATA A has a fixed setting and is
not stored like in SSB/CW.
The behaviour at AFSK A is not clear to me. (The same happens when I switch
to PSK D. No audio as well.)

This could all be my error (if so, what am I doing wrong), dedicated design
(if so, why?) or a bug.

Can someone please tell me what I should do to get the correct behaviour and
memory of bandwidth?
Thanks!

73
Henk PA0C