[Elecraft] KX3 Question about use of ESSB for Data Modes

[Don Wilhelm]

Dave,

For several reasons I would advocate DATA A mode over SSB (or ESSB) for 
data modes.
First, most data mode signals are contained within the 300 to 3000 Hz 
range when the VFO is set at the 'recommended' data mode band frequency.
Secondly, it is easy to move the VFO knob to hear and decode signals 
that are operating at the extreme edges of that bandwidth.
Thirdly, using DATA A mode automatically turns off compression and TX 
EQ.  Those must be manually turned off when using SSB or ESSB.

All in all, my opinion is that DATA A is just more convenient to use 
than either SSB or ESSB for data modes.  While SSB will work just fine 
if the proper precautions are taken, DATA A mode makes it automatic. The 
VFO is easy to move to get to those stations operating on the extreme 
edges (or outside) the "normal" passband.

73,
Don W3FPR

On 5/1/2014 12:08 AM, David Box Comcast wrote:
> I am having a lot of fun learning as much as I can about the KX3 and really enjoy using it.  I have been playing with PSK-31 and using the Data mode with FlDigi.  The frequency range I am able to work is about 400Hz on low end due to receiver roll off and then the upper transmitter bandwidth is 2950Hz as the power rolls off sharply above this.  So I have set my waterfall in FlDigi to display 400 - 3000 Hz.
>
> That range works very well and making contacts but was thinking tonight if the ESSB mode would broaden the available frequency span.  Not a fan of ESSB on voice but are there any negatives in using to extend bandwidth on digital modes like PSK-31.  I'll probably run some tests tomorrow but wanted to query the vast experience base of this group and see if this had already been checked.
>
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