Omnia 6 Use and Installation Guide – Version 1.00a
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Multiplex Power Limiting
In certain parts of the world, the power of the overall multiplex signal must be controlled to prevent or
reduce adjacent channel interference to closely spaced stations. The currently enforced standard falls under
the ITU BS-412 regulations. The Omna6-fm has a very effective Multiplex Power Limiter algorithm that
may be enabled to comply with these regulations.
ITU BS-412 MPX Limiter Controls
For European countries that require it, the proprietary Omnia 6 Multiplex Power Limiter maintains the
average multiplex power as required by regulatory agencies. The algorithm will maintain the average
multiplex power from 0.0dB to +9.0dB (in 0.25dB steps) above the original 0.0dB ITU BS-412 standard.
The default setting is Off.
Loudness Loss Warning!
If your country's regulatory agency does not require the use of the ITU BS-412 Multiplex Power Limiter,
make certain that the BS-412 Power Limiter is set to off, or severe loss of loudness will result! For
example, when the ITU BS-412 Power Limiter is switched on and set at 0.0dB, there is approximately a
FIVE dB loudness loss
over the limiter being switched off!
