Try Cooling off your Optimod first
This may or may not help, but it helped me with an Optimod 8100.
Audio going over the STL would splatter on the air, with the 8100; I can't have it in the studio because I have two Marti's for left and right down one pipe coming out 600 Ohms that has to convert to composite to the TX. So it must remain there.
To cool off the STL, I put a limiter on the audio going out from the studio, and then made up for the lower audio by allowing the 8100 to go out hotter. It worked and removed splatter and other annoying noises produced in the audio from the STL to TX.'
To date, we replaced the 8100 with a newer model, and the theory still applies. We have to limit what the jocks send out and keep it cool, and the new Processor takes care of the rest. I get a great response with more highs, mids, and lows when needed.
Basically, you're doing the same thing if you can have the Processor at the studio before the STL, Just in some cases like mine; you have to have it at the TX site.
Just a thought, try cooling off your first link in the air chain and go from there.
-Doc
> Just curious.
> You have a crappy STL signal coming from the main studio.
> The Optimod is now ACCENTUATING the hiss caused by the STL.
> It's 98% covered during music playback, but during the talk
> it sounds like a buck-tooth beaver whistling through a
> picket
> fence while frying eggs.
>
> What do you do sparky? What do you do?
>
> And don't say "fix the STL". You can only adjust the
> Optimiod.
>
> Thanks,
> The Spindoctor
> <P ID="signature">______________
Doc Bryce Everybody!</P>