I have just completed a new document that explains how to connect the
TS-590S to the SDR-IQ receiver.
then click on the link:
"HOWTO connect the Kenwood TS-590S to the SDR-IQ Software Defined
towards the bottom of the page.
This is the first release of the document. Please let me know if
anything isn't clear, or if there are any errors.
The TS-590S Resources Page: