Ensemble Designs 6010 Four Channel 24-bit Audio ADC - Manual (Page 2)

MODULE OVERVIEW
The 6010 Four Channel 20-bit Analog to Digital Converter (ADC) converts four channels
of analog audio to two AES digital audio streams. Analog to digital conversion is
performed with 20-bit precision.
As shown in the block diagram below, four high impedance balanced analog audio inputs
enter the module on a high density 15-pin connector. The signals are buffered and passed
through gain adjustment circuitry before being converted to digital audio and sent to two
AES outputs (four copies of each) on rear BNC connectors. The ADC sample clocks may be
locked to an internal 48 kHz crystal controlled sample rate clock or locked to an external
AES3id reference from a BNC on the rear backplane.
Front panel indicators are provided for monitoring the external AES reference and the
four input channels of analog audio as well as power and CPU status.
Control of the module can be from one of the remote Avenue options or from the local
controls on the front of the module. Adjustments on the module include a rotary control to
set the analog input reference level and a set of switches to set the digital output
reference level. (Both of these reference levels determine the analog input gain.) The on-
board microprocessor communicates with the frame for remote control via the Avenue
System Control module if installed. Module ID (slot location, software version and board
revision) and status information can be monitored by the frame System Control module
and read using the optional interfaces available. Alarms can also be enabled if desired.
Power is derived from the ± 12 volt frame power. It is regulated to the required voltages
for the module by on-board regulators. The module is fused with resettable fuse devices.
If a fuse opens due to an overcurrent condition, the module will lose power. After pulling
the module, the fuse will reset automatically requiring no replacement fuse.
Model 6010 Four Channel 20-bit Audio ADC
Microcontroller
Crystal
Oscillator
ADC
ADC
AES
TX
AES
TX
Balanced
Analog
Inputs
Balanced
Analog
Inputs
AES
Outputs
AES
Outputs
Ref In
Remote
Control
Gain
Adj.
Gain
Adj.
Gain
Adj.
Gain
Adj.
Level
Control
Dip
Switches
Status
Indicators
6010 Four Channel 20-bit Audio ADC Functional Block Diagram
6010-2