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DDA-212 Series 2 Digital Audio Distribution Amplifiers are 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 or AES3.
DDA-212 Series 2 units have two inputs and 12 outputs, with the assignment of inputs and outputs configurable from a front panel switch. The unit may be operated as a Dual 1X6 or as a 2-Input 1X12, depending on the Input Select switch setting. The selected input feeds AES audio to either six or all 12 separate outputs.
A front panel switch selects either re-clocking or non-reclocking of the input signal. In most cases, re-clocking is preferred, as this feature improves the integrity of weak or distorted input signals. Re-clocking may be switched off to allow distribution of AES sync signals, Dolby E encoded AES signals, or other signals that should not be re-clocked.
DDA-212 Series 2 units work with AES signals that contain sample rates from 27 through 192kHz and 16-bit through 24-bit density, thus permitting very high resolution signals to be distributed.
The front panel displays full status of the input signal, including Sample rate, Word Length, Digital Errors and Pro or Consumer Mode.
DDA-212 Series 2 units contain a unique automatic equalization function that can adjust for extremely long input lines. Equalization works independently for each input. A Front Panel Lock feature protects all your settings.
The Model DDA-212XLR uses XLR connectors and operates from and drives a 110-ohm balanced shielded twisted pair distribution system per AES3-1992.
S/PDIF (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 DDA- 212BNC with use of an RCA-to-BNC input cable.
Input Loop-through connections for each of the two inputs are provided to permit multiple units to be stacked, or to insert the DDA-212 into your digital workflow. Switchable line termination is provided. Standard practice dictates that the last AES input be terminated; therefore, if you are not using the loop-through feature, Input Termination should be switched ON.
|INPUT CONNECTORS||XLR female; paralleled input connectors for loop-thru expansion|
|IMPEDANCE||Transformer isolated, balanced and floating, XLR 110 ohms|
|SAMPLING FREQUENCY||27 to 192kHz|
|CABLE LENGTH||> 1000 feet (300 meters) of 110 ohm cable with equalizer|
|EQUALIZER||Automatic EQ for long lines via front panel push button|
|CLOCK||Regenerated from input signal with dual mode PLL or non-reclocked to preserve Surround coding, switchable|
|OUTPUT CONNECTORS||6 x XLR Male|
|LEVEL||XLR 4Vp-p loaded|
|IMPEDANCE||XLR 110 ohms, balanced and transformer isolated|
|OUTPUT JITTER||< 300 picoseconds peak to peak|
|PROPAGATION DELAY||< 25 nanoseconds|
|INDICATORS INPUT FAULT||Input 1, Input 2; identifies input with error condition|
|INPUT TERMINATION||On, Off|
|INPUT SAMPLE RATE||32, 44.1, 48, 88.2, 96, 176.4 and 192 kHz|
|INPUT WORD LENGTH||16, 18, 20 and 24 bits|
|INPUT DIGITAL ERRORS||Bi-Phase/Parity, Validity, Non-Linear PCM, DTS-CD Signal|
|INPUT CABLE EQ||Locked, Enabled|
|INPUT SELECT||1, Bridge, 2|
|POWER||LED indicates power is applied|
|POWER||Internal Supply, 115/230VAC (selectable via internal jumper) ±10%, 50/60Hz, 10VA, IEC320 3 pin connector|
|SIZE||19” W x 1.75“ H x 8.5” D; 9 lbs.|
|WARRANTY||Limited, One Year Warranty|
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