Brochure pdf
Manual pdf
Model DA 4x4b
Model GEN-DDA/WC Digital Sync. Generator

The Radio Systems model DDA/WC 4x4 is a professional quality digital distribution amplifier with four independent sections of four output AES/EBU distribution and six Word Clock outputs.
The AES/EBU input sections feature balanced inputs to four independent, buffered balanced
outputs. A three digit LED display for each section reads out the sampling frequency. Two LED’s
for each section indicate PLL (unlock) and data (validity) errors.
An external Word Clock signal input is provided, buffered and distributed to six independent outputs. In the event of external source failure, or at the user’s option, a frame-clock reference signal,
selectable from any of the four AES-EBU inputs is regenerated and output to the Word-Clock outputs.

Rear connectivity is via 15 pin “D” connectors for AES/EBU signals and BNC connectors for
Word-Clock input and outputs. Break-out “octopus” cables are available to connect the AES/EBU inputs and distributed outputs via XLR or RJ-45 (StudioHub+ connectors.)

  • Four sections of AES-EBU each with four outputs
  • Two sections of AES-EBU each with eight outputs (requires input splitters)
  • Front panel LED sample rate readout and error indication
  • Six Word Clock outputs with frame clock synchronization
  • 32, 44.1, 48, 82.2, 192 Khz sampling rates supported
  • 1 r.u. rack mount with xlr breakout panels available
  • 110/220 Volt auto- voltage sensing




Number of inputs: 4

Connectors: 15 pin D

Impedance: 110 Ohms typ.

Sensitivity: min. 0.2 Vpp

Sample rates: 30 kHz to 200 kHz
per the AES3 1992 specification

Word Clock
Number of inputs:
1 external plus one of four selected from AES/EBU Inputs

Impedance: hi-Z or 75 Ohms (jumper)

Sensitivity: 1 Vpp


Number of outputs: 16 (four for each input)

Impedance: 110 Ohms typ.

Output level: 5 Vpp , 110 Ohms load

Sample rates: 30 kHz to 200 kHz per the AES3 1992 specification

Word Clock
Number of outputs: 4

Impedance: 75 Ohms, TTL level

Power Supply
Voltage: 90 – 264 VAC

Frequency: 47-440Hz

Current Consumption: .5 amps

Power Cable: IEC

Weight: appr. 6 lbs.

19” wide x 1 3/4” (1 rack unit) high x 14” deep
48.26 cm wide x 4.445mm (1 rack unit) high
x 35.56mm deep

Radio Systems, Inc.      601 Heron Drive      Logan Township, NJ 08085      Phone: 856-467-8000      Fax: 856-467-3044