Actually, the KIO3B USB port handles PTT and Key just as if they were
attached to a physical serial port.
It does NOT handle FSK, which was and remains part of the ACC connector,
not the serial port or its control signals.
73 and Merry Christmas,
Lyle KK7P
For FSK you still have to break out serial port lines for Key In and PTT and
feed them to the the ACC port but that is easily done with a couple of
transistors.
---
Also, will the new KIO3B allow for FSK keying with no additional hardware or
cabling to the K3's ACC connector?
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