DDA208 Dual 1×4 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. The DDA208 isolated dual inputs feed AES audio each to four separate outputs. An internal switch selects either re-clocking or non-re-clocking 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 ot allow distribution of AES sync signals, Dolby E encoded AES signals, or other signals that should not be re-clocked.DDA208 units work with AES signals that contain sample rates from 27 through 192kHz and16-bit through 24-bit density, thus permitting very high resolution signals to be distributed.The DDA208 uses XLR input/output connectors, and operates from and drives a 110-ohm balanced shielded twisted pair distribution system per AES3-1992. Switchable line termination is provided via an internal switch. Standard practice dictates that the last AES input be terminated.Main Features:Accepts sample rates from 27 to 192kHzSwitchable re-clocking regenerates stable data before distributionTransformer balanced and isolated inputsSwitchable input terminationIndividual, transformer balanced and isolated 110-ohm XLR outputsEight outputs; inputs can be bridged via internal switch to provide 1×8 output capabilityQuiet, internal power supplyAC Input 100-250 VAC 50/60 Hz, 25W MaximumAttractive and rugged 1RU packageSpecifications:INPUTCONNECTORS – 2 each XLR FemaleLEVEL – XLR 0.2Vp-p minimumIMPEDANCE – Transformer isolated, balanced and floating, XLR 110 ohms; terminating resistors may be switched in or out via internal switchSAMPLING FREQUENCY – 27 to 192kHzCABLE LENGTH – > 1000 feet (300 meters) of 110 ohm cable with equalizerEQUALIZER – EQ for long lines via internal switchCLOCK – Regenerated from input signal with dual mode PLL or non-re-clocked to preserve surround coding, switchable via internal switchA-B INPUTS BRIDGED – Inputs can be bridged via internal switch to provide 1×8 output capabilityOUTPUTS – group a/bCONNECTORS – 4 each XLR MaleLEVEL – XLR 4Vp-p loadedIMPEDANCE – XLR 110 ohms, balanced and transformer isolatedOUTPUT JITTER – < 300 picoseconds peak to peak.PROPAGATION DELAY - < 25 nanosecondsINDICATORS - output groups a/bPOWERAES INPUT LOCKEDAES EQ ENABLEDAUDIO ERRORA-B INPUTS BRIDGED