Audio Technologies DDA106-XLR, DDA124-XLR, DDA112-BNC, DDA212-XLR, DDA112-XLR User Manual

Digital Audio Distribution Amplifiers

DDA Series

These AES/EBU Digital Audio Distribution Amplifiers are available in single and dual input
configurations. Levels and connectors are optimized for use with balanced XLR 110 ohm cable
or unbalanced BNC 75 ohm coax. Adjustable input cable equalization and multiple regenerated
independent AES/EBU low jitter outputs make them ideal for the most demanding digital audio
signal distribution requirements in both large and small audio and video facilities.

Sample rates from 27 to 96kHz are decoded and cleanly regenerated. Standard sample rates
of 32, 44.1, 48, 88.2, and 96kHz are indicated with front panel numeric readouts. Signal status
are error messages included in the AES/EBU data format are decoded and displayed to
provide visual assurance of data integrity and also to provide an easy means to optimize input
cable equalization.

• Accepts sample rates

from 27 to 96kHz

• Data relocking and

regeneration

• Input cable equalization

• Status and Error

indicators

• Transformer balanced

inputs

• Transformer balanced

110 ohm XLR outputs

• Individual, isolated 75

ohm BNC drivers

• Loop-thru inputs with

switchable terminations

• Up to 12XLR of 24BNC

• DDA106-XLR DDA124-XLR

Models

• DDA112-BNC DDA212-XLR

• DDA112-XLR DDA224-BNC

Digital Audio Distribution Amplifiers

Technical Specifications

INPUT

CONNECTORS XLR female or BNC. Paralleled input connectors for loop-thru expansion
LEVEL XLR .2Vp-p minimum, BNC .1Vp-p minimum
IMPEDANCE Transformer isolated, balanced and floating, XLR 110 ohms, BNC 75 ohms

SAMPLING
FREQUENCY
CABLE LENGTH > 300 meters of 110 ohm cable with equalizer, 75 ohm coax allows longer

EQUALIZER Ten turn panel control, adjust using status indicators
CLOCK Regenerated from input signal with dual mode PLL.
CLOCK JITTER < 3nanoseconds peak to peak

OUTPUTS

CONNECTORS XLR Male, 6 or 12 depending on model. BNC chassis mount, 12 or 24.
LEVEL XLR 4Vp-p loaded, BNC 2Vp-p loaded.
IMPEDANCE XLR 110 ohms, balanced and transformer isolated. BNC 75 ohms,

OUTPUT JITTER < 3 nanoseconds peak to peak.
PROPAGATION
DELAY

INDICATORS

SAMPLE RATE Numerical readout of first two places of 32, 44.1, 88.2 or 96kHz rates
RECEIVED SIGNAL Status Green NO ERROR, LOCK, VALIDITY, all ON for normal operation

CABLE EQUALIZER LED SET indicator, lit Green for normal operation
POWER Internal Supply, 115/230VAC +/- 10%, 50/60Hz, 10VA. IEC320 3 pin

POWER

SIZE 1 RU Package, 19” (48.3cm) W x 1 3/4 “ (4.5cm) H x 7” (19.1cm) D, 10lbs

WARRANTY

DDA Series

Terminating resistors may be switched in or out on rear panel

27 to 96kHz

runs

unbalanced

< 100 nanoseconds

Errors Red PARITY, CRC (Cyclic Redundancy), BIPHASE, normal is OFF

connector

(4kG)

Limited, One Year Warranty