Melissa has been listening to the buzz on controlling various
radios via computer interfaces. She is tuned in on the latest
techniques and is ready to present the news.
The RX-320 actually has a documented control interface using
standard readily available cables. The PCR-1000 has a standard serial
connection as well. Rumor has it that the new Icoms have USB serial
interfaces. But, is there documentation? And why not push audio
over USB, as long as the wire is there for control already.
Often radios have a TTL-level serial interface. Converter boxes,
special circuits, and special cables need to be built.
The hamlib project creates a unified interface to a diverse set of
radios with even more diverse capabilities.
Several projects show how to handle the kinds of control signals
available on old radios.