I have many a post about this in this forum and direct Lab 599 support requests to resolve this.? In the Kenwood 2000 protocol, the MD command (mode) has a few states.? With testing I found the MD6; will place the TX500 into DIG mode.? Problem is that when Mode is queried, the radio responds with MD2 (USB mode).
With all the other firmware updates through the years, I'm struggling to figure out why a seemingly simple issue has not been fixed.
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Grace & peace,
Tim AF6TF