ART Pro Audio DPS - DI/O Preamp System - Manual (Page 8)

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DIGITAL LEVEL
The digital level knobs control the input gain to the digital converters of
the DPS™. The purpose of the digital level control is to get the loudest
possible signal into the converters before clipping starts to occur. The
front mounted clip lights easily notify the user before digital clipping
occurs. For the optimal input signal, raise the gain until the digital clip
lights just start to flicker, then back off on the digital level by a hair until
the clip lights go out. One should most likely test this using the hottest
signal they will be using (or use the OPL™ feature on the V3™ setting
to get your levels just right.)
There are several paths in which audio can reach the digital signal
converters. One is the using the analog inputs of the DPS™. When
used in said manner, the analog signals of both channels in the DPS™
automatically go into the digital converters.
On the back of the DPS™ there is a side chain. One can either send
out the signals to an effects processor, such as an ART Dual Levelar
for additional compression, and return it to the DPS™ using the rear
TRS jacks on the back. One could also patch directly into the returns
off the side chain, and patch something directly to the A/D converters.
SAMPLE RATE CONTROL
This button controls the current sampling rate the DPS™ is working at.
By cycling through the various settings, displayed by the upper LED
row, one can use a variety of sampling rates. When the ADAT setting
is used, the DPS™ syncs to incoming ADAT clock on the ADAT input.
If the ADAT LED is blinking, the DPS™ has failed to find a valid ADAT
clock. When the LED is solidly lit, it has found an acceptable ADAT
clock signal. When EXT is selected, the DPS™ looks to the Word
Clock input and synchronizes itself to that. If no word clock signal is
present, the LED will blink informing you of that no valid word clock
signal is present.