I don't think that anyone has experience with 2 mixed Tuners in an Xtrend ET9200 yet.
Than I will be the first. I'll keep this topic updated.
Well, there's news. It works, with the latest drivers. My Xtrend 9200 has 2 built-in DVB-S2 tuners and now 2 USB Sundtek DVB-C tuners, one old and one new.
The old one is tuner C and the new one is tuner D. Tuner D gives no reading about signal quality and zapping is a bit slower than with tuner C. Maybe, with some driver enhancements, it will even perform better.
However, it works for now.