You don't need the tones brought out separate from the RX audio.

As long as you can feed the discriminator audio to the RTCM, it will decode CTCSS tones using the built-in DSP.  

If you don't have access to the discriminator audio, you will need a COR logic output from the radio.

On Mar 13, 2013, at 9:37 AM, Bill Hurlock <bill.hurlock@cpcomms.com> wrote:

How can I decode the CTCSS tones and use them for Tone Squelch when I'm using a RTCM interconnect to my transceiver. I do not have a rig that exports the tone as a separate output from the radio. The rig is a Yaesu 736R and I use Demod audio and direct TX mod connections. Outbound is working find.

Bill Hurlock
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