Embedded Talk Back Audio setup -Atem Constellation 12g

I would appreciate help on the following.

We are using the Atem Constellation 12G with the USRA broadcast cameras.. For the producer to hear the camera operators using a 5 pin headset plugged into the front of the mixer, he has to turn on the volume audio for the camera on the Atem mixer, the talkback audio is then also coming out of the master and therefore on air. We have analogue audio into the mixer that we want to go on air and not the talkback audio, how do we resolve this? many thanks for your assistance.

It sounds like your camera operators are talking to the regular 3-pin XLR inputs, and not via the actual talkback input (4-pin "iPhone" jack or 5-pin XLR if you have the Fiber Backs).

The regular XLR inputs are sent on SDI audio track 1 & 2, talkback is sent on 15 / 16. Enabling the audio in the Audio Mixer-tab is taking track 1 & 2 and mixing them into the program mix, so this should not affect any talkback audio.