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Optimod 1101-PC and Optimod 8100

T

tgreen

Guest
Is anyone using an Optimod 1101-PC card in front of an 8100? If so, I would like to know what success you had and what your 8100 settings are. I am bench testing this system and want to make sure I have it correct before I put it on the air.
 
It's an interesting airchain. You should use the 8100 only for the HF limiting and the final clipping (compressor OFF).
 
This is the idea I wanted to try for some time, but didn't yet get around to actually doing it. I have 8100 sitting at home and I use 1100 regularly in my PC... I would make sure to set the output of 1101 to processing without limiting, bypassing the look-ahead limiter. Also bypass the compressor in 8100 going straight into 8100's clippers, as stha points out. I'm not sure off the top of my head wheather compressor bypass will bypass the HF limiter in 8100 as well, but you will definitely want that HF limiter active. I would expect most problems with pre-emphasis as it will be applied after the 1101's MB compressor/limiter and ahead of 8100's clipper. You will have to negotiate multiband thresholds in 1101 carefully as well as the balance between 1101/8100 and also leverage the HF limiter in the 8100. I'm not sure how much loudness (without nasty artifacts) you will be able to achieve overall. Let us know!

If the compressor bypass control bypasses HF limiter as well, you may want to arrange the gain structure (low input drive to 8100 then compensate with clipper drive) as well as set the fastest release time in 8100 to minimize compressor intervention. You may also set the appropriate jumpers in the 8100 for XT2 operation, which would "desensitize" the compressor. If you're comfortable with schematics and electronics, the best would be to apply the compressor bypass, then find the trace that applies the bypass bias to HF limiter and cut it (this is all under assumption that compressor bypass switch removes HF limiter as well).


Regards,
Goran Tomas
 
Just checked my 8100, the processor has a separate compressor bypass and limiter bypass controls. So you can turn off the compressor while still leaving the HF limiter active....


Regards,
Goran Tomas
 
I agree that with this combination, the 8100's compressor should be turned off because the 1100 can do all of the AGC and multiband compression itself. Because there is no multiband disortion-cancelling clipping in this chain it's not quite a "poor man's XT2," but you can still achieve many of the benefits offered by 5-band compression.

Bob Orban
 
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