Ensemble Designs 6020 User Manual
This data pack provides detailed installation, configuration and operation information for
the Model 6020 Four Channel 20-bit Audio Digital to Analog Converter (DAC)
module as part of the Avenue Signal Integration System.
The module information in this data pack is organized into the following sections:
• Module Overview
• Applications
• Installation
• Cabling
• Module Configuration and Control
°
Front Panel Controls and Indicators
°
Avenue PC Remote Control
°
Avenue Touch Screen Remote Control
• Troubleshooting
• Software Updating
• Warranty and Factory Service
• Specifications
6020-1
Model 6020
Four Channel
20-bit Audio DAC
Data Pack
Revision 3.1 SW v1.0.0
MODULE OVERVIEW
The 6020 Four Channel 20-bit Digital to Analog Converter (DAC) converts two AES digital
audio streams to four channels of analog audio. Digital to analog conversion is performed
with 20-bit precision.
As shown in the block diagram below, two AES audio inputs from BNCs on the backplane
enter the module and pass through AES receiver circuitry to the digital to analog converters. A gain adjustment is provided for the analog output levels. The buffered audio is then
fed to the output to a 15-pin high density connector. Unbalanced monitor outputs are
provided on BNC connectors.
Status indicators include error detection for noting presence of valid AES input signals as
well as indication that emphasis flags have been set on either AES input. Appropriate deemphasis is applied automatically when a flag is set.
Control of the module can be from one of the remote Avenue options or from the local
controls on the front of the module. The gain of the analog output stages can be adjusted
remotely or locally. The on-board microprocessor communicates with the frame for remote
control via the Avenue System Control module if installed. Module ID information (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
the 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 6020 Four Channel 20-bit Audio DAC
6020 Four Channel 20-bit Audio DAC Functional Block Diagram
6020-2
Remote
Control
Balanced
Analog
Outputs
Balanced
Analog
Outputs
AES
Input
AES
Input
AES
RX
AES
RX
DAC
DAC
Microcontroller
Level
Control
Gain
Adj.
Gain
Adj.
Gain
Adj.
Gain
Adj.
Status
Indicators
APPLICATIONS
In the application illustrated below, a 6020 module is used to convert two 2-channel AES
signals to analog to feed the audio inputs of an analog VTR. Unbalanced monitor outputs
are used to drive a local audio monitoring system.
Even though it is a four channel device, the 6020 utilizes two separate 2-channel D/A converters. In the application shown below, a 6020 module is used to convert two independent
2-channel AES signals to analog to feed the audio inputs of two independent 2-track
analog audio tape recorders. Care should be exercised when connecting the audio outputs
of the 6020 to ensure that one machine is connected to outputs 1 and 2 and the other
machine to outputs 3 and 4. This will ensure that the pairing of the AES input signals will
be preserved at the analog inputs of the two tape machines.
Model 6020 Four Channel 20-bit Audio DAC
6020-3
6020 Feeding an Analog VTR
6030 Converting Two Independent 2-Channel AES Signals
AUDIO MONITORS
BALANCED AUDIO INPUTS
AES IN
CH 1/2
AES IN
CH 3/4
UNBALANCED OUTPUTS
CH 1
CH 2
CH 3
CH 4
6020 AUDIO DAC
ANALOG VTR
AUDIO TAPE RECORDER #1
AES IN
#1
AES IN
#2
AUDIO OUTPUTS
CH 1
CH 2
CH 3
CH 4
CH 1/LEFT
CH 2/RIGHT
AUDIO INPUTS
CH 3/LEFT
6020 AUDIO DAC
CH 4/RIGHT
AUDIO TAPE RECORDER #2
In the application shown below, a 6020 module is used to convert two AES audio outputs
of a digital VTR to analog in order to feed an analog audio routing switcher.
The 6020 has balanced transformerless outputs. This application shows how to drive
external equipment with single-ended (unbalanced) inputs. Note that the minus (-) side of
the balanced output stage is left floating; it should not be connected to ground. In addition
to its four balanced line level outputs, the 6020 has four unbalanced outputs. These
outputs, available on BNC connectors, are suitable for driving monitor amplifiers or other
similar equipment as shown in the first application on the preceding page.
Model 6020 Four Channel 20-bit Audio DAC
6020-4
6020 Converting Digital VTR Outputs to Feed Analog Routing Switcher
6020 Driving Single-Ended Inputs
AUDIO OUTPUTS
AES OUT CH 1/2
AES OUT CH 3/4
CH 1
CH 2
CH 3
CH 4
ANALOG AUDIO
TO FACILITY
ROUTING
SIWTHCER
DIGITAL VTR
6020 AUDIO DAC
BALANCED
AUDIO OUTPUT
(1 OF 4) UNBALANCED AUDIO INPUT
+
_
GND
6020 AUDIO DAC
SHIELDED CABLE
GND
ANALOG AUDIO
DESTINATION
6020 AUDIO DAC
UNBALANCED
AUDIO OUTPUT
(1 OF 4)
SHIELDED CABLE
GND
UNBALANCED AUDIO INPUT
GND
ANALOG AUDIO
DESTINATION
Model 6020 Four Channel 20-bit Audio DAC
6020-5
INSTALLATION
Plug the 6020 module into any one of the ten slots in the frame and install the plastic
overlay provided onto the corresponding group of rear BNC connectors associated with the
module location. Note that the plastic overlay has an optional adhesive backing for
securing it to the frame. Use of the adhesive backing is only necessary if you would like
the location to be permanent and is not recommended if you need to change module
locations. This module may be hot-swapped (inserted or removed) without powering down
or disturbing performance of the other modules in the system.
CABLING
Refer to the backplane diagram of the module below for cabling instructions.
Connect an AES
input signal to the
AES In 1/2 BNC.
Connect the 15-pin
high-density Audio Out
connector to an analog
audio destination.
Refer to the pinout
diagram below.
Connect an AES
input signal to the
AES In 3/4 BNC.
Connect Mon 1-4
BNCs to to singleended analog
monitor outputs.
6020 Wiring to Frame
15-pin D Male Connector
CH 2
+
+
CH 4
Wiring Side-Male Plug
---
CH 1
-
CH 3
+
1
6
11
+
MODULE CONFIGURATION AND CONTROL
The parameters for each Avenue module must be configured after installation. This can be
done remotely using one of the Avenue remote control options or locally using the module
front panel controls. Each module has a REMOTE/LOCAL switch on the front edge of
the circuit board which must first be set to the control mode you will be using.
The configuration parameter choices for the module will differ between Remote and
Local modes. In Remote mode, the choices are made through software and allow more
selections. The 6020 Parameter Table on the following page summarizes and compares
the various configuration parameters that can be set remotely or locally and the
default/factory settings.
If you are not using an remote control option, the module parameters must be configured
from the front panel switches. Parameters that have no front panel control will be set to a
default value. The Local switches are illustrated in the Front Panel Controls and
Indicators section following the 6020 Parameter Table.
Avenue module parameters can be configured and controlled remotely from one or both of
the remote control options, the Avenue Touch Screen or the Avenue PC Application. Once
the module parameters have been set remotely, the information is stored on the module
CPU. This allows the module be moved to a different cell in the frame at your discretion
without losing the stored information. Remote configuration will override whatever the
switch settings are on the front edge of the module.
For setting the parameters remotely using the Avenue PC option, refer to the Avenue PC
Remote Configuration section of this document.
For setting the parameters remotely using the Avenue Touch Screen option, refer to the
Avenue Touch Screen Remote Configuration section of this data pack following
Avenue PC.
Model 6020 Four Channel 20-bit Audio DAC
6020-6
Model 6020 Four Channel 20-bit Audio DAC
6020 Parameter Table
6020-7
CONTROL
Ch 1/2 Mode
Ch 3/4 Mode
Ch 1/2 Emph Mode
Ch 3/4 Emph Mode
CH 1-4 Digital Ref
Ch 1-4 Analog Ref
LOCAL
No Adjustment
No Adjustment
No Adjustment
Shaft Encoder:
-10dBu to +8dBu
REMOTE
2-Channel
Stereo
Quad Tracking
Off
On
Auto
-20 dBFS
-18 dBFS
-16DBFS
(Ch 1-4 Quad Tracking,
Ch 1/2 and/or 3/4 stereo pair or
individual channel adjustment)
-10dBu to +8dBu
(Ch 1-4 Quad Tracking,
Ch 1/2 and/or 3/4 stereo pair or
individual channel adjustment)
DEFAULT VALUE
Quad Tracking
Auto
N/A
N/A
Model 6020 Four Channel 20-bit Audio DAC
Front Panel Controls and Indicators
Each front edge indicator and switch setting is explained in the diagram below:
6020-8
Remote/Local switch:
Selects local or
remote control.
Pwr green LED:
Indicates the presence (ON)
or absence (OFF) of power.
CPU green LED:
OFF:
A power fault or halted CPU
ON:
A halted CPU
FAST BLINK:
CPU Run error
SLOW BLINK:
System OK. (If SPI control is
active from the main frame
System Control Module, all
Run indicators will be syn-
chronized.).
Err 1/2 and 3/4 red LEDs:
Blinking indicates no signal
present or other major errors.
On indicates signal present
with minor errors.
OFF AES signal inputs OK.
GAIN Adjustment:
Adjusts all four analog
outputs equally.
Emp 1/2 and 3/4 yellow LEDs:
ON indicates emphasis is being
corrected.
Blinking indicates emphasis is not
being corrected or incorrect deemphasis has been forced manually.
Off indicates no emphasis is
detected on the input signal pair.
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