Don Wilhelm-4 wrote:
>
> Oleg,
>
> With the K2, you should have zero ALC bars illuminated - reduce your
> audio input level until the ALC bar does not illuminate.
> Are you using SSB mode? If so, have you set the menu SSBC parameter
> to1:1?
> You can set up the RTTY filter set (turn RTTY=ON in the secondary menu),
> and you will have a dedicated mode for soundcard data modes. The
> advantage is that the compression setting is independent of that used
> for SSB.
>
In DATA (RTTY) mode it is perfectly OK to have one ALC bar illuminated. I
believe that the K2s use a "soft" ALC in this mode, similar to the K3. When
set up this way my 10W K2 actually produces lower IMD (-34dB at 5W) than my
K3 at the same power level, and the ALC maintains the power level to that
requested across a wide range of audio frequencies.
On the other hand, I have found it almost impossible to measure IMD reliably
using sound card software. I measured it using the KK7UQ IMD meter.
-----
Julian, G4ILO. K2 #392 K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html
--
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