ATI Audio DDA212-BNC - Manual (Page 5)

ATI Audio Inc. ■ Tel: 856-626-3480 ■ Fax: 856-504-0220 ■ [email protected] ■ www. audio.com
Mode LEDs On Function
1 1 Unit operates as Dual 1X6, front panel
displays and controls Input 1
2 2 Unit operates as Dual 1X6, front panel
displays and controls Input 2
3 1 & Bridge Unit operates as 1X12 using Input 1 as
source; front panel displays and controls
Input 1
4 2 & Bridge Unit operates as 1X12 using Input 2 as
source; front panel displays and controls
Input 2
DDA212 Series 2 units retain their last operating mode even if power is
interrupted.
Front Panel Lock
Press and hold the FRONT PANEL LOCK button to lock all the front panel
controls. Press and hold again to unlock.
TRANSMITTERS
The Frame sync (FSYNC), Serial Clock (SCK), Serial audio data (SDATA),
Channel status (C), User channel data (U), and data Validity information (VERF)
are passed directly to the transmitters for reformatting into the AES/EBU output
data stream. The transmitters are capable of operation from 27 to 192 kHz
equivalent sample rates. The transmitters operate in a transparent mode, which
allows the transmitter block structure (Channel Status, User and Validity bits) to
be slaved to the block structure of the receiver. In the transparent mode the
propagation delay of data is less than 25 nanoseconds even at the lowest
sample rate.
OUTPUT DRIVERS
DDA-212XLR units are equipped with balanced, 110-ohm, transformer coupled
outputs and XLR type connectors. DDA-212BNC units use the alternative 75-
ohm unbalanced outputs to BNC coax connectors. The XLR outputs are in full
compliance with specification AES3-1992 and the BNC outputs are in
accordance with the recommendations of AES-3id-1995. XLR outputs are
transformer coupled for ground isolation.
POWER SUPPLY
Power transformer primary windings are paralleled for 115VAC or wired in series
for 230VAC. Internal jumpers allow field modification if necessary. See below for
voltage conversion instructions.