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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
DDA/WC-4x4 Distribution Amplifier
and
GEN-DDA/WC Sync Generator Manual
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Content s
Overview.........................................................................4
Installation ......................................................................5
Operation ........................................................................ 6
Connections.....................................................................7
Signal Flow Diagram - GEN-DDA/WC.................................9
Signal Flow Diagram - DDAWC-4x4.................................. 10
Specifications - GEN-DDA/WC .......................................... 1 1
Specifications - DDA/WC-4x4 ........................................... 12
Warranty ........................................................................ 13
Repair Policy................................................................... 13
Return Instructions.......................................................... 13
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Overview
The Radio Systems Digital Distribution System is comprised of two units:
* Model GEN-DDA/WC
* Model DDA/WC-4x4
The Radio Systems model GEN - DDA/WC is a professional quality digital sync. generator with an
integrated AES/EBU distribution amplifier and six Word Clock outputs.
The two fully independent AES/EBU input sections feature balanced inputs to four 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.
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.
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Installation
Mounting
The GEN-DDA/WC and DDA/WC-4x4 each occupy only 1 rack unit (1-3/4 inch) of height in a 19 inch
EIA rack. To allow for adequate ventilation, avoid mounting the unit directly above large heat
producing equipment such as power amps or power supplies.
When stacking units, it is recommended that one rack space (1-3/4 inch) remain open between
every three units.
Power
Mains are wired using a standard IEC power cord.
The internal switch-mode power supply auto-detects incoming voltages from 90 to 246V AC, 50/60
Hz. An internal 1 amp fuse protects the circuitry from overload
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Operation
Model GEN-DDA/WC
In the event of an external AES/EBU signal failure to either input section, the unit automatically
switches to a high precision internal signal generator. Front panel indication and selection of the
stand-by internal sample frequency is provided. The internal precision generator may be selected to
generate clocks in lieu of the external AES/EBU input.
Push the “INT” front panel switch to select the internal sync generator. Select any sample rate.
In addition, audio that appears with an AES/EBU input will be distributed to the AES/EBU outputs if
the AES/EBU input is selected as the generator source.
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 either of the two AES/EBU inputs is regenerated and output to the Word Clock
outputs.
Model DDA/WC-4x4
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.
Push and hold any operating frequency button to pre-set the switch-over sample rate in the event of
an external reference failure.
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Connections
Rear connectivity is via 15 pin “D” connectors for AES/EBU signals and BNC connectors for Word
Clock input and outputs. A XLR “break-out” panel is available to connect AES/EBU inputs and
distributed outputs via XLR.
AC line voltage is auto detected and can operate from voltages from 96V to 264V AC.
Model GEN-DDA/WC
AES WORD CLOCK
AES IN 1
1 IN x 4 OUT
AES IN 2
1 IN x 4 OUT
IN OUT-1 OUT-2 OUT-3 OUT-4 OUT-5 OUT-6
DB-15 Connections:
Pin 1 AES In 1+
Pin 2 N /C
Pin 3 AES Out 1+
Pin 4 AES Out 2+
Pin 5 AES Out 3+
Pin 6 AES Out 4+
Pin 7 N /C
Pin 8 Ground
Pin 9 AES In 1 Pin 10 N/ C
Pin 11 AES Out 1Pin 12 AES Out 2Pin 13 AES Out 3-
Main In
100 240 V AC
Pin 14 AES Out 4Pin 15 Ground
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Model DDA/WC-4x4
AES WORD CLOCK
AES IN 1
1 IN x 4 OUT
AES IN 2
1 IN x 4 OUT
AES IN 3
1 IN x 4 OUT
AES IN 4
1 IN x 4 OUT
DB-15 Connections:
Pin 1 AES In 1+
Pin 2 N/C
Pin 3 AES Out 1+
Pin 4 AES Out 2+
Pin 5 AES Out 3+
Pin 6 AES Out 4+
Pin 7 N/C
Pin 8 Ground
Pin 9 AES In 1 Pin 10 N/ C
Pin 11 AES Out 1Pin 12 AES Out 2-
IN OUT-1 OUT-2 OUT-3 OUT-4 OUT-5 OUT-6
Main In
100 240 V AC
Pin 13 AES Out 3Pin 14 AES Out 4Pin 15 Ground
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Signal Flow Diagram
GEN-DDA/WC
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Signal Flow Diagram
DDA/WC-4x4
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Specifications: GEN-DDA/WC
Inputs: AES/EBU
Number of Inputs 2
Connectors 15 pin ‘D’
Impedance 110 ohm typical
Sensitivity Min. 0.2 Vpp
Sample Rates 30 KHz to 200 KHz per the AES3-1992 specification
Inputs: Word Clock
Number of Inputs 1 external plus one of four selected from AES/EBU inputs
Impedance Hi-Z or 75 ohm (jumper selectable)
Sensitivity 1 Vpp
Outputs: AES/EBU
Number of Outputs 8 (4 for each input)
Impedance 110 ohm typical
Output Level 5 Vpp, 110 ohm load
Sample Rates 30 KHz to 200 KHz per the AES3-1992 specification
Outputs: Word Clock
Number of Outputs 6
Impedance 75 ohm, TTL Level
Power Supply
Input Voltage 90 - 264 VAC
Frequency 47 - 440 Hz
Current Consumption 0.5 Amps
Connector IE C
Physical
Weight 6 lbs (2.7 kgs)
Dimensions 19” W x 1.75” H x 14” D
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48.26 cm W x 4.445 cm H x 35.56 cm D
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Specifications: DDA/WC-4x4
Inputs: AES/EBU
Number of Inputs 4
Connectors 15 pin ‘D’
Impedance 110 ohm typical
Sensitivity Min. 0.2 Vpp
Sample Rates 30 KHz to 200 KHz per the AES3-1992 specification
Inputs: Word Clock
Number of Inputs 1 external plus one of four selected from AES/EBU inputs
Impedance Hi-Z or 75 ohm (jumper selectable)
Sensitivity 1 Vpp
Outputs: AES/EBU
Number of Outputs 16 (4 for each input)
Impedance 110 ohm typical
Output Level 5 Vpp, 110 ohm load
Sample Rates 30 KHz to 200 KHz per the AES3-1992 specification
Outputs: Word Clock
Number of Outputs 4
Impedance 75 ohm, TTL Level
Power Supply
Input Voltage 90 - 264 VAC
Frequency 47 - 440 Hz
Current Consumption 0.5 Amps
Connector IE C
Physical
Weight 6 lbs (2.7 kgs)
Dimensions 19” W x 1.75” H x 14” D
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48.26cm W x 4.445 cm H x 35.56 cm D
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Radio Systems, Inc. GEN-DDA/WC & DDA/WC-4x4 Manual
Warranty
Radio Systems warrants this equipment to be free from defects in materials and workmanship for a
period of one (1) year.
This warranty extends to first users of the product and future owners who purchase the product
within the warranty period.
The terms of this warranty are null and void if this product is stored or operated in an environment
not conducive to electronic equipment, or shows signs of misuse or modifications which affect the
proper functioning of the product. This warranty does not apply to damage caused by fire, smoke,
flood, lightning, or acts of nature and physical abuse.
Radio Systems, and its associated companies, authorized distributors, and personnel are not liable
for loss of revenues or other damages or effects to the broadcast signal quality or coverage which
may result from the improper functioning of this product.
Repair Policy
Technical assistance is available at any time, at nor charge, by phone or correspondence.
During the warranty period, there will be no charge for parts or service made to units which show no
sign of misuse by customer or lightning caused damage. The customer is responsible for the cost of
shipping their unit back to Radio Systems for repair.
During the warranty period, shipment of small parts and assemblies may also be made at a charge
to the user. Emergency shipments of replacement parts and circuits will be made at the user’s
request for an extra shipping and service charge. Chargeable services will be made COD or on Net30 day terms to users with established accounts.
During the warranty period, full credit or return of COD charges (less any service and expedited
shipping charges) will be made to users who return the defective parts or circuits within 30 days, if
the damage is covered under the terms of the warranty.
Return Instructions
Contact Radio Systems at 856-467-8000 for a return authorization number.
Pack all items carefully and ship pre-paid, via UPS insured, to:
Radio Systems
601 Heron Drive
Logan Township, NJ 08085
Attn: R.A.#_____________
Enclose a note which includes your name, company, phone number, the serial number, return
address (no box numbers), and a complete description of the problem.
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For Assy:
Part# DDA-4x4
2/09
601 Heron Drive
Logan T ownship, NJ 08085
Phone: 856-467-8000 Fax: 856-467-3044
http://www.radiosystems.com
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