ATI Audio DXA112-BNC User Manual
Page 2
ATI Audio Inc.
Tel: 856-719-9900
www.
audio.com
PURPOSE
The DXA Series of Digital Audio Distribution Amplifiers is designed to regenerate,
isolate and distribute digital audio data formatted in accordance with
specifications AES3-1992 and IEC 958. This is commonly called AES/EBU
formatting.
DXAxxx-XLR models use XLR connectors and operate from and drive a 110-ohm
balanced shielded twisted pair distribution system per AES3-1992.
DXAxxx-BNC models use BNC connectors and operate from and drive single-
ended 75-ohm coaxial cable per AES-3id-1995 and are designed to integrate
easily into video facilities.
SP/DIF (consumer) formatted digital audio data differs primarily in the use of
consumer type "RCA" audio connectors in an unbalanced 75 ohm system and
can be handled by a DXAxxx-BNC with use of an RCA to BNC input cable.
FEATURES
• Accepts sample rates from 27 to 96kHz
• Loop-thru transformer balanced and isolated inputs
• Switchable input termination resistors
• Individual, transformer balanced and isolated 110 ohm XLR outputs
• Individual isolated 75-ohm BNC outputs
• Single or dual inputs
• Up to 12 XLR or 24 BNC outputs
• Quiet, internal linear power supplies
• Attractive, one rack unit package
DESCRIPTION
INPUTS
Incoming AES/EBU formatted digital audio data is applied to input transformer T8
(and T9 for second input channel of dual unit). Both XLR and BNC inputs are
balanced and DC isolated from ground. Input blocking capacitors C22 (C24)
prevent accidental DC inputs from saturating (and perhaps damaging) the input
transformers. Input termination resistors R25 (R26) at 75 ohms for BNC (and
SP/DIF) inputs or 110 ohms for XLR inputs can be switched in or out of the circuit
with rear panel DIP switches S1a (S1b). Inputs should always be terminated
unless they are looped-thru to another device or DXA input. The last device or
input should always terminate the line.