BDI AES-403 Technical Reference Manual Download Page 3

Introduction 

 

The AES-403 Multi Switcher Audio System comprises of a two input AES compatible switcher 
where Input B can be pre configured for analog input, dual output digital audio DA and digital to 
analog converter. The unit also has status and diagnostic error indicators for troubleshooting. The 
AES-403 is intended for use at unattended transmitter sites or for virtually any digital/and or 
analog switching, distribution and/or D/A conversion application. The unit has the capability to 
automatically switch inputs upon detection of loss of clock, digital error flags and/or silence sense. 
In addition to these features, the unit can function as an interface standards converter. As 
shipped from the factory the unit is supplied with XLR balanced connectors.  For unbalanced use 
such as the 75 ohm unbalanced AES standard for digital audio transmission transformer adapters 
are available from Broadcast Devices, Inc. for conversion of the AES-403 I/O to unbalanced 75 
ohm operation.  
 
 

I. 

Unpacking 

 

Carefully inspect the unit after unpacking and make certain that no damage has occurred during 
shipping. If damage is noted, contact the shipper immediately and file a claim for damages. Each 
unit is carefully packed and carries full insurance against damage. Inspect the packing list and 
make sure that the contents of the package match those described on the packing list. 
 

II. 

Installation and Connections 

 
 

Select a space in suitable E.I.A. standard rack to locate the unit. Determine the local electrical 
power supply voltage. As supplied from the factory, your AES-403 is setup for 100 – 240 V.A.C. 
50 - 60 Hz. No external adjustment for local power standards is necessary if power available 
conforms to the above rating. The AES-402 utilizes a switch mode power supply and 
automatically adjusts for local power entry. Make connections to the unit following good 
engineering practice. Supply power to the unit utilizing a three pronged grounded outlet. Do no lift 
the electrical ground to the unit at the power receptacle as this will result in a safety hazard. In the 
event of ground loops, lift the ground at the offending connection only. Make certain that the unit 
is afforded proper ventilation in the area of the top cover vent.  
 

A.  Digital Interface 

 
 

The AES-403 inputs are balanced XLR connections conforming to the AES standard.  Each XLR 
connection is terminated at 110 ohms as per the standard. The balanced digital outputs are also 
XLR connections which provide 110-ohm transformer coupled source impedance as per the AES 
standard. To unbalance any input or output unbalanced termination adapters can be purchased 
from Broadcast Devices, Inc. Order P/N 75 – XLRM for inputs and P/N 75-XLRF for output 
connections. All BDI adapters utilize BNC female interface for application to 75 ohm BNC 
connectorized cabling.  
 

B.  Analog Interface 

 

There is provided on the rear of the unit a left/right balanced analog input and output. This output 
is suitable for driving 600-ohm balanced lines and is short circuit protected. The analog input is 
designed to accept ba4 dBm level and provides a bridging input. A headphone jack and 
volume control buttons are provided on the front panel of the unit for confidence monitoring of the 
incoming feed. XLR balanced outputs conform to + 4 dBm output referenced to – 20 dBFS digital 
output.  

 

Summary of Contents for AES-403

Page 1: ...ES 403 Multi Switcher Digital Analog Input Audio Switcher DA Digital to Analog Converter Technical Reference Manual Broadcast Devices Inc Tel 914 737 5032 Fax 914 736 6916 World Wide Web www Broadcast Devices com Rev A 03 14 ...

Page 2: ...I Unpacking 3 II Installation and Connections 3 III Features and Operation 4 IV Initial Operating Setup 4 7 AES 403 Optional Programming Functions 5 6 Remote Control Connections 8 Serial Interface 9 V Specifications 10 VI Warranty 11 2 ...

Page 3: ...AES 403 is setup for 100 240 V A C 50 60 Hz No external adjustment for local power standards is necessary if power available conforms to the above rating The AES 402 utilizes a switch mode power supply and automatically adjusts for local power entry Make connections to the unit following good engineering practice Supply power to the unit utilizing a three pronged grounded outlet Do no lift the ele...

Page 4: ...ur in external equipment Through application of a DIP switch the unit can either switch immediately upon detection of digital errors or wait 5 seconds and then switch This delay prevents the unit from switching under transient conditions IV Initial Operating Set up Attach input and output connections to the unit using the appropriate connector Plug the remote control plug in and tighten the connec...

Page 5: ...dy for operation All that is left to do is to select the desired feed and then if desired place the unit in automatic switch mode by depressing the AUTO mode button The LED indicator will light indicating automatic control of the switcher The unit will remain in this mode until an error is detected loss of lock occurs silence or is detected If any of these events occur the unit will switch to the ...

Page 6: ...non PCM audio formats set S2 6 S2 7 S1 4 and S1 5 to off position This will allow the AES 402 unit to act as a manual digital audio switcher for non PCM audio streams and defeats the silence sensor which cannot be used in the is mode of operation AES 403 Front Panel DIP Switch Programming Guide of Operation Table 1 S1 1 OFF Front Panel Button Disables A B and AUTO MAN Buttons Factory Default ON Si...

Page 7: ...AES 403 Main PC Board DIP SWITCH SW1 SETTINGS DIPSWITCH1 1 4 ADC Sample Rate 1 2 3 4 32 KHZ ON OFF ON ON 44 1 KHZ OFF ON OFF ON 48 KHZ ON OFF ON OFF INPUT B DIPSWITCH1 8 AES ON ANALOG OFF 7 ...

Page 8: ...put Pin 4 Select A Input Pin 5 Error Reset Pin 6 Status Common Pin 7 Status B Selected Pin 8 Status A Selected Pin 9 Auto Mode Status Command input pins 2 3 4 5 require a momentary closure to ground Status connections open collector outputs which require a 5 VDC pull up Remote Control RS 232 Connection Diagram 8 ...

Page 9: ...ctors DB9F throughout Front Panel Controls 7 Momentary Push buttons Switcher Selection Error Reset Auto Manual Mode Operation Select Volume Up Down Front Panel Indicators Sample Rate Lock Loss Error Flags Channel Status Auto Manual Mode Power Requirements 100 240 V A C 0 25A 50 60 Hz Operating Environment 0 60 Degrees Celsius Non Condensing Atmosphere Physical 19 W X 8 D X 1 75 H Mounted via Stand...

Page 10: ...ns and features from time to time www broadcast devices com Tel 914 737 5032 Facsimile 914 736 6916 VI Warranty Broadcast Devices Inc products are warranted against failure due to faulty materials or workmanship for a period of one year from the date of shipment from Broadcast Devices Inc dock The warranty covers repair or replacement of defective parts at the factory provided the unit has been re...

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