E l e c t r o n i c B r o a d c a s t E q u i p m e n t
Pag. 8
Xtreme
Sec. 1 The Xtreme audio processor
The Audio
Xtreme II
processor is a complete audio signal processing system for AM, FM and TV transmissions.
The sound quality defines the station’s image and professionalism. The importance of the AUDIO PROCESSOR is
therefore clear.
The wholly digital technology with which
Xtreme II
was built means that the results obtained can IN NO WAY BE
COMPARED with those of any other traditional processor.
The multi-band structure is the best way to process an audio signal;
Xtreme II
is based on five-band processing of the
audio signal, with a storage capacity equal to 82 different equalization curves, 64 of them editable.
Every curve has the facility for integral control of process parameters to give your station a competitive sound, with extra
power, continuity, presence and clarity, without “pumping” or other unnatural effects.
All of
Xtreme II’s
adjustments and operational sequences are distinctly shown on a high resolution LCD graphic display
and are facilitated by a guided menu showing the enabled functions at every programming step.
The equalization and compression curve trends are shown on the display, which graphically reproduces the spectral
distribution of the processed signal over 5 bars.
Sec. 1-1 Full control of peak modulation
Xtreme II
provides full control of AM, FM and TV audio signal transmission levels and can interface with any transmitter
habitually used in any part of the world.
Xtreme II
performs a high-precision peak control, restricting over-modulation level to just 0.3 dB !
The
Xtreme II
audio processor dynamically controls the pre-boost level, it can never be heard to operate, and produces
a clear, open, brilliant sound which improves the original program.
Xtreme II’s
audio processing circuits produce a signal which is pre-boosted with 50 µs or 75 µs curves and is controlled
precisely and absolutely in order to avoid over-modulation; the signal is then filtered to protect the pilot tone at 19 KHz.
If the 2-channel signal output by the processor is inserted in an external stereo encoder, we advise you not to place any
element between the two appliances that could alter band width and enlarge modulation peaks beyond average modulation
levels. Otherwise, modulation level must be reduced to control the highest peaks.
Low-pass filters, high-pass filters, transformers, distribution amplifiers, and long transmission lines, can all cause the
signal to alter. We advise you to by-pass any low-pass filter and pre-booster circuits present on normal stereo coders; we
should stress that these measures have already been adopted inside the processor.
Obviously the above criteria for optimal control of peak modulation levels can be satisfied more easily if the audio
processor uses the internal stereo encoder. In Xtreme, there are no circuit elements between the audio processor and the
internal stereo encoder that could cause wave shape distortions. We therefore advise you to use Xtreme with its own built-
in encoder whenever feasible.
