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I'm studying the accessory connector (DB-25) from a Kenwood NX-700 radio. It seems that I might use the AFO and/or DEO signals, but I haven't been able to get proper documentation on such pins/signals. I'd like to get the audio data received and hopefully send data via other pins on this connector too, avoiding the use of the standard mic/PTT/speaker connectors. Also, is there any pin that provides a S-meter like output?

Could anyone please assist me on getting more info on these?

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  • AFO is filtered, squelched audio.
  • DEO is raw discriminator audio.

Here is a PDF of the NX-700 pin documentation.

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