[Elecraft] RX IQ sound card problems KX3

[Peter Eijlander (PA0PJE)]

OK, so I suppose when you move the line-in level to zero the noise from
the computer speakers go to zero as well.

Check if not by mistake the microphone is used as input for HDSDR.

You cannot use the phones output in combination with HDSDR, the program
expects the I and Q sigs on the respective left and right channels of
the sound card's line input. The output from HDSDR should then in turn
be routed to the computer's speakers. In fact the line input also
affects the reading on the S-meter in HDSDR.

The large "carrier" looks to me as the hum you describe, for that would 
be seen as a carrier close to the center frequency displayed.

If you unplug the I/Q output on the KX3 and touch the tip or ring on the 
plug you should be able to see and hear that action in HDSDR.

73,
Peter - PA0PJE

W9TTW Tabb Adams schreef:
> Yep it is on in the menu, when I bring up the display on HDSDR there
> is a large carrier in the center of the display same noise I am
> hearing when I plug the RX IQ into the sound card. Strange thing is
> when I just use the phones output from the KX3 I don't get the noise
> just when I plug into the RX IQ port. I can work digital modes just
> fine with no noise.
>