ATI Audio DDA212-BNC - Manual (Page 3)

ATI Audio Inc. ■ Tel: 856-626-3480 ■ Fax: 856-504-0220 ■ [email protected] ■ www. audio.com
FEATURES
• Configurable for Dual 1X6 or 2-Input 1X12 operation
• Accepts sample rates from 27 to 192kHz
• Displays standard sample rates of 32, 44.1, 48, 88.2, 96, 176.4 and 192 kHz
• Displays Word Length of 16, 18, 20 and 24 bit
• Status and error LEDs show clock lock and data validity
• Automatic input equalizers compensate for very long cable runs
• Switchable re-clocking regenerates stable data before distribution
• Loop thru transformer balanced and isolated inputs
• Switchable input termination
• Individual, transformer balanced and isolated 110-ohm XLR outputs (XLR only)
• Individual isolated 75-ohm BNC outputs (BNC only)
• Two front-panel-selectable inputs
• 12 outputs
• Front panel control locking system
• Quiet, internal linear power supply
• Attractive and rugged 1RU package
DESCRIPTION
INPUTS
Incoming AES/EBU formatted digital audio data from Inputs 1 and 2 is applied to
individual input transformers. Input termination resistors at 75 ohms for BNC
inputs or 110 ohms for XLR inputs can be switched in or out of the circuit with the
front panel Input Term switch. Inputs should always be terminated unless they
are looped thru to another device or DDA input. The last device or input should
always terminate the line.
INPUT EQUALIZERS
The input signals feed automatic cable equalizer circuits. Input equalization
should only be necessary for extremely long input cable lengths and should only
be used if proven to be necessary. Automatic equalization is enabled by pressing
the front panel button labeled Input EQ. The automatic equalizer provides only
the minimum amount of boost required to compensate for excess cable roll-off to
avoid over-equalization, which can degrade noise margins. Input equalizers work
independently for Input 1 and Input 2.
RECEIVERS
When input re-clocking is enabled, the equalized AES/EBU data stream is
applied to the receiver circuit which recovers the clock and synchronization
signals and separates the audio and digital data. The audio data may be 16 to 24
bits at sample rates from 27 to 192 kHz.