SV Sound SX-VT, SX-ST user manual Channels A/D Converter

6. 8 CHANNELS A/D CONVERTER

With the optional 8 channels 24 bits A/D converter, the SX-ST / SX-VT series provide with 8 digital outputs, combined in 4 AES/EBU pairs available on a 25pin Sub-D connector.

The 3 position switches "IN 1 MIX" to "IN 8 MIX" select which sources are routed to the A/D converters:

IN (left position) : feeds the direct output of the corresponding Input channel to the converter. It is the same signal as on the Direct Output connector.

MIX (right position): feeds the Mix of the corresponding Group ( Master ) to the ADC

OFF (center position ): the A/D converter is powered OFF, thus reducing power consumption when not in use. Note that an audible click is heared while turning the ADC On and Off.

The L/O red Led above the switches lits ON either when the Limiter becomes active ( L ) or when the modulation reaches or overflows the OdBFS ( O )

Each of the 8 channels is equipped with a fast peak limiter. The LIMITERS switch turns all limiters ON and OFF. The Limiter becomes active at –3 dBFS

Then sample rate frequency can be selected from 44,1kHz up to 192kHz. The frequency is selected for all ADC with two switches:

The upper switch selects either 44,1kHz or 48kHz The lower switch selects their respective multiples.

Clock and Sync:

The ADC's are running on an internal clock with an accuracy of +/- 20 ppm. The same clock is used to synchronize the internal DC/DC converter that power the entire mixer to avoid phasing effects.

The internal clock works as "Master" and has no external sync capability. A WordClock output is available on the 5pin Lemo connector to synchronize external devices such as digital recorder.

SX-ST / SX-SV User Manual page 22