Barracuda Networks SP4 Manual de usuario descargar pdf (Pagina 54)

STEREO GENERATOR –LEVEL AND WORKING MODES

ENG

Axel Technology srl

www.axeltechnology.com

24 STEREO GENERATOR –LEVEL AND WORKING MODES

24.1 INPUT AUDIO LEVEL CONTROL

Input level control stage is actually based on two sub-controls: sensitivity adjustment

and ‘fine’ tuning, independent for channels Left and Right.

Right Gain (applies to either analog or digital sources). It may adjusted in + /- 12 dB

range with 0.1 dB step. Default: 0 dB.

Left Gain (applies to either analog or digital sources). It may adjusted in + /- 12 dB

range with 0.1 dB step. Default: 0 dB.

Sensitivity: different for analog and digital sources, it may adjusted in 0.1 dB

steps. Analog: + 15 dBm to – 9 dBm. Digital: from 0.0 dBfs to – 24.0 dBfs.

Two buttons allows to Return automatically to Zero (RTZ) level on Input L/R Gains.

Input gains controls are automatically disabled

when automatic Working Modes are engaged (Clipper

MPX and LogClipper)–see next paragraphs.

24.2 SETTING THE OUTPUT PRE-EMPHASIS

(MPX panel / Preemphasis): it may be set to Off, 50uSec (as in use in European countries),

75uSec (as in use in North America, Canada and other countries)

NOTE: Only one pre-emphasis must be kept active in the transmitting chain. It is advisable to

turn OFF the Barracuda pre-emphasis and Enable the pre-emphasis generated by the audio

processor. This because a pre-emphasis filter applied at the last step of an audio chain

emphasizes ‘payload’ signal along with possible noise, thus resulting in a degraded performance

of the whole system.

It is advisable to set the right Pre-

emphasis as first step, as it affects the MPX generated level and thus the

whole level tuning process described in these pages.

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Barracuda Networks SP4 Manual de usuario Pagina 54