To change the De-Emphasis setting, rotate the jog-wheel to highlight one of the three choices:
Off
,
50 µs
or
75 µs
. Click the jog-wheel to set the de-emphasis selection. If choosing a de-emphasis time constant, it should match
the pre-emphasis time constant. Bear in mind that if Pre-Emphasis is turned on, selecting
De-Emphasis
Off
means
that the outputs will be pre-emphasized.
Note:
The
De-Emphasis
setting does not affect the composite MPX outputs,
which always follow the
Pre-Emphasis
setting.
Note:
The headphone output is automatically appropriately de-emphasized when any value of pre-emphasis is being
used.
Outputs
Think of this as a simple router. It enables either the
FM
or
HD/DAB
output signals to be routed to whichever
physical output is desired: the Analog, AES-1, or AES-2 connectors. The analog output (including the Headphones)
can be assigned to either the conventional FM, or the HD/DAB output for monitoring purposes.
Power Limiting (FM Mode Only)
In certain parts of the world, the average multiplex signal power must be controlled to reduce adjacent channel
interference. The currently enforced standard falls under the ITU BS-412 regulations. The Omnia-6EX has a very
effective Multiplex Power Limiter that may be enabled to comply with these regulations.
The Power Limiter control sets the average multiplex power from 0.0dB up to 9.0dB (in 0.25dB steps) above the
original 0.0dB ITU BS-412 standard. The default setting is
Off
.
Effectiveness of the Omnia’s ITU BS-412 Power Limiter
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!
Omnia-6ex Use and Operation Manual – V: 1.10
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