[Elecraft] Using USB mode for PSK31 rather than DATA A

[Bob Cunnings]

That's it - you must turn compression off, one of the virtues of DATA
A is that it does this for you automatically. With compression off it
should work fine.

See pg. 31 of the K3 Owner's Manual where it says:

"Soundcard-based data communications can be done
using LSB or USB mode. However, DATA modes
offer several benefits not available in SSB modes.
If you prefer to use LSB or USB, you'll need to
manually set CMP to 0 to prevent data signal
distortion..."

Bob NW8L

On Mon, Feb 16, 2009 at 12:47 PM,  <Steven.Zabarnick at notes.udayton.edu> wrote:
> No I did not turn off compression. I will give this a try. Has anyone else
> tried using PSK31 with USB mode?
>
>>Did you turn compression off?
>>
>>Bob NW8L
>
> On Mon, Feb 16, 2009 at 12:12 PM,  <Steven.Zabarnick at notes.udayton.edu>
> wrote:
>> After all this discussion of power control in DATA A mode vs SSB, I
> decided
>> to try using PSK31 with USB mode, rather than DATA A. I changed the MIC
> SEL
>> menu item to Line IN and adjusted the ALC meter to 4-5 bars using the MIC
>> GAIN control. The PSK31 power output appeared to closely match the K3
> power
>> setting. Unfortunately, I received horrendous feedback about the widthand
>> IMD of my signal -- when I returned to DATA A mode, my signal width and
> IMD
>> returned back to acceptable values.
>>
>> Steve N9SZ
>
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