Albalá Ingenieros DAT3000C01 User manual

DAT3000C01
DUAL AES/EBU DIGITAL AUDIO SAMPLING RATE CONVERTER/DELAY LINE
Version 1.0
Albalá Ingenieros, S.A.
Medea, 4 - 28037 Madrid - Spain
21 December 2016 - © Albalá Ingenieros S.A. - All rights reserved

DAT3000C01

DAT3000C01
DUAL AES/EBU DIGITAL AUDIO SAMPLING RATE CONVERTER/DELAY LINE
Version 1.0
1. DESCRIPTION ...................................................................................................................... 5
1.1. The DAT3000C01 ............................................................................................................................ 5
1.2. Features ............................................................................................................................................. 6
1.3. Block diagram .................................................................................................................................. 7
2. SPECIFICATIONS ................................................................................................................. 9
3. INSTALLATION .................................................................................................................. 11
3.1. Initial inspection .......................................................................................................................... 11
3.2. Safety instructions ...................................................................................................................... 11
3.3. Environmental considerations ................................................................................................ 12
3.4. Power considerations ................................................................................................................. 12
3.5. Module configuration ................................................................................................................ 12
3.5.1. Selection of 20 or 24 bits at the input ......................................................................... 13
3.5.2. Selection of 20 or 24 bits at the output ...................................................................... 13
3.5.3. Selection of the external reference .............................................................................. 13
3.5.4. Termination of the delay input ...................................................................................... 14
3.5.5. Termination of the digital audio inputs ...................................................................... 14
3.5.6. Selection of automatic mode or manual mode for the reference input ......... 14
3.5.7. Selection of the sampling frequency ........................................................................... 15
3.6. Installing the module in the mounting frame ................................................................... 15
3.7. Interconnection ............................................................................................................................ 17
3.7.1. Digital audio connections ................................................................................................ 17
3.7.2. Connections for analog video, word-clock and the delay signal ........................ 18
4. OPERATION ...................................................................................................................... 19
4.1. Front panel description .............................................................................................................. 19
4.2. Functional description ............................................................................................................... 21
4.2.1. Description of the sampling frequency converter ................................................... 21
4.2.2. Description of the delay line ........................................................................................... 22
4.2.3. Processing of the channel status bits .......................................................................... 23
4.2.4. Description of the processing unit ................................................................................ 24
4.2.5. V and U bits ........................................................................................................................... 25
4.2.6. Operation in 20 or 24 bit mode ...................................................................................... 25
4.2.7. Operation in doubled sampling frequency mode ................................................... 26

4.2.8. Description of the synchronization .............................................................................. 27
4.2.8.1. Selection of the variable speed, (varispeed) operating mode ..................... 27
4.2.8.2. Operation in Automatic Mode .............................................................................. 27
4.2.8.3. Operation in Manual Mode .................................................................................... 28
4.3. Module remote control and supervision ............................................................................. 29
4.3.1. Details of the DAT3000C01 registers ........................................................................... 30
5. GLOSSARY ........................................................................................................................ 33
6. REGULATIONS .................................................................................................................. 35
7. VERSIONS ......................................................................................................................... 37

Albalá Ingenieros | Manual DAT3000C01
1. DESCRIPTION
1.1. The DAT3000C01
The DAT3000C01 is a multi-purpose module for AES/EBU digital audio. It can modify
within a wide range the sampling frequency of an audio signal, accepting nearly any
signal normally used in program production. The DAT3000C01 also provides a delay line
that can delay a signal for over one second at a sampling frequency of 48kHz and
provides dynamic compensation of the delay of the audio in order to match the video.
The DAT3000C01 has two independent sections, each of which accepts an AES/EBU
digital audio stream. Frequency conversion is completely asynchronous and is only
limited by the requirement that the ratio of frequencies between the input and the
output be less than or equal to 1:7. The two output streams use the same sampling
frequency set by the reference signal provided.
The DAT3000C01 module accepts the typical reference signals found in production
environments: PAL or NTSC video (black burst), TTL audio sampling frequency signals
(word-clock) and AES/EBU digital audio signals as per AES11. The output signals'
sampling frequency can be set to any of the following standard values: 32, 44.1, 48, 64,
88.2 or 96kHz. If a frequency other than those listed is required, the DAT3000C01 can be
operated in varispeed mode. A quartz crystal oscillator together with a digital direct
synthesis circuit (DDS) is used to generate the master clock for the standard sampling
frequencies, guaranteeing low jitter operation.
The DAT3000C01 also includes a processing unit for manipulation of the audio signals.
This includes a 4x4 matrix for connection of any of the inputs to any of the outputs, a
level adjust and a 180° phase adjust for each of the input channels. Furthermore,
monophonic signals can be generated from the stereophonic input signals.
The front panel of the module contains indicator LEDs to display the status of the audio
inputs of each section and the status of the reference signal.
It is possible to monitor the DAT3000C01 status remotely using a communications
controller module installed in the same mounting frame. In addition, certain controller
modules provide SNMP management and the ability to record events in a file including
date and time information for further analysis.
The DAT3000C01 is a TL3000 terminal line module and can be housed in a three rack
unit (3 RU) UR3000 mounting frame or a 1 RU UR3100 mounting frame.
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Albalá Ingenieros | Manual DAT3000C01
1.2. Features
•Dual low-distortion sampling frequency converter and programmable line delay for
AES/EBU digital audio.
• Provides two identical sections, each corresponding to an AES/EBU digital audio stream.
• Wide 1:7 or 7:1 range of conversion frequencies.
•Generates the following common sampling frequencies: 32kHz, 44.1kHz, 48kHz,
64kHz, 88.2kHz and 96kHz.
• Low jitter.
•Includes a delay line capable of delaying a stream by more than 1 s using a 48kHz
sampling frequency.
• Provides a delay input for automatic tracking of audio delay with respect to video.
• Includes an audio processor with channel routing, level and phase manipulation.
• Digital audio inputs provide loop-through, are balanced and are transformer isolated.
• Balanced, transformer isolated digital audio outputs.
• Each digital audio output is available on two connectors.
•Accepts three different reference signal types: black burst, word-clock and AES/EBU
digital audio.
•Digital audio reference input provides loop-through, is balanced and is transformer
isolated.
• Word-clock and black burst reference inputs provide loop-through and are coaxial.
•Both the sampling frequency and the reference input can be selected manually or
automatically.
•Module control and supervision can be done remotely when the mounting frame is
equipped with a communications controller module.
•One UR3000 mounting frame can house up to 12 DAT3000C01 modules. If power
supply redundancy is required and FA3000 or FA3001 modules are used then only 10
modules can be housed in the mounting frame. If PSU3300 or PSU3301 modules are
used for this purpose then up to 12 modules can be installed.
• One UR3100 mounting frame can house up to three DAT3000C01 modules.
• Low power.
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Albalá Ingenieros | Manual DAT3000C01
1.3. Block diagram
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Albalá Ingenieros | Manual DAT3000C01
DAT3000C01
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Albalá Ingenieros | Manual DAT3000C01
2. SPECIFICATIONS
AES/EBU digital audio signal input
Connector Plug-in terminal,
3.81mm pitch
Impedance 110Ω ± 20 %
Type Transformer balanced
Encoding and electrical characteristics According to
EBU Tech. 3250-E/AES3
standard
Sampling rate 30 to 100 kHz
Number of inputs 1 per section, 2 sections
AES/EBU digital audio signal output
Connector Plug-in terminal,
3.81mm pitch
Impedance 110Ω ± 20 %
Type Transformer balanced
Encoding and electrical characteristics According to
EBU Tech. 3250-E/AES3
standard
Sampling rate 32kHz, 44.1kHz, 48kHz,
64kHz, 88.2kHz and 96 kHz
Number of outputs 2 per section
Jitter <300 psRMS
AES digital audio signal
Sample rate converter:
Number of bits 24
Input to output sample ratios 7:1 to 1:7
Harmonic distortion plus noise (THD+N) >116dB measured with a 997Hz, -
1dBFS tone
Input to output delay (fsout > fsin) 48/fsin +
10/fsout ± 100 us
Input to output delay (fsout < f<ss ypos='-0.8'>s</ss> in) 16/fsin +
42/fsout ± 100 us
Delay line:
Minimum delay 6/fsout
Maximun delay (6+65535)/fsout
Steps 1/fsout
Video delay input (TTL signal)
Connector BNC
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Albalá Ingenieros | Manual DAT3000C01
Type Passive Loop-Through or 75Ω loaded
Threshold levels:
VIH min. 2.0 V
VIL max. 0.8 V
Black-burst reference signal input
Connector BNC
Return loss >30dB up to 5 MHz
Type Passive Loop-Through or 75Ω loaded
Signal format According to ITU-R BT.470-6 standard
Accepted formats 625i50, 525i59.94
Input signal amplitude 300mVpp ± 6 dB
AES/EBU digital audio reference signal input
Connector Plug-in terminal,
3.81mm pitch
Impedance Loop-Through or 110Ω loaded
Type Transformer balanced
Encoding and electrical characteristics According to
EBU Tech. 3250-E/AES3
standard
Sampling rate 32kHz, 44.1kHz, 48kHz,
64kHz, 88.2kHz and 96 kHz
Word-clock reference signal input
Connector BNC
Type Passive Loop-Through or 75Ω loaded
Sampling rate 32kHz, 44.1kHz, 48kHz,
64kHz, 88.2kHz and 96 kHz
Input level 2 - 5VPP
General
Maximum power supply current + 390 / - 0 mA
Operating temperature range 0 .. 50 °C
Approximate weight 300 g
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Albalá Ingenieros | Manual DAT3000C01
3. INSTALLATION
THE DAT3000C01 MODULE CONTAINS ELECTRONIC DEVICES SENSITIVE TO
ELECTROSTATIC DISCHARGE. Always use antistatic bags clearly identified
with a high degree of shielding for storage and transportation.
The DAT3000C01 module is composed of two parts: one DAT3000P01 main board and
one DAT3000P02 rear board. Both parts must be installed in a UR3000 or UR3100
mounting frame following the instructions in the corresponding section of this chapter.
3.1. Initial inspection
Verify that the package has been properly handled during transport. After opening the
packaging, check that one DAT3000P01 main board and one DAT3000P02 rear board are
inside.
You must notify your Albalá Ingenieros distributor or dealer of any damage or defects
observed.
Follow the instructions in this manual to install this module in the mounting frame.
3.2. Safety instructions
•This equipment must be connected to a mains outlet with a protective
earth connection. Never use extension cords that do not have protective
earthing connection. The lack of an effective electrical connection between
the ground pin in the mains input connector of the equipment and the
protective earth of the electrical power distribution can cause serious harm.
•All modules of the Albalá Ingenieros TL3000 terminal line can be
hot-plugged or unplugged without suffering any damage or affecting the
processes that are currently taking place in other modules in the same
mounting frame. When a module is installed in an empty bay of a mounting
frame, it is necessary to mount the rear board that is part of that module.
Prior to installing this board, the mounting frame must be disconnected
from the power supply network. This is required because in addition to the
risk of electrocution for the person handling the device it is possible that a
high instantaneous current coming from the power supply could damage
the connectors and components of the mounting frame and/or the rear
board.
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Albalá Ingenieros | Manual DAT3000C01
•The DAT3000C01 module and the mounting frame should always be
installed, maintained, operated and removed by personnel with sufficient
technical qualifications. The equipment should never be placed in damp
areas, near splashing liquid, or in explosive or corrosive atmospheres.
Neither modules nor mounting frames can be used in applications that
could endanger human life.
3.3. Environmental considerations
This symbol indicates that this equipment must be deposited at a collection
point for proper waste treatment once it has reached the end of its useful
life.
3.4. Power considerations
The UR3000 and UR3100 mounting frames can house as many DAT3000C01 modules as
will fit in them.
3.5. Module configuration
The DAT3000C01 provides multiple program jumpers for configuration.
In addition to mechanical installation of the module into a mounting frame, the
following configurations are required:
- Operation with 20 or 24 bits at the input.
- Operation with 20 or 24 bits at the output.
- Selection of the output sampling frequency.
- Selection of the reference input.
- Loading termination for the inputs.
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Albalá Ingenieros | Manual DAT3000C01
PROGRAM JUMPERS FOR THE DAT3000C01
3.5.1. Selection of 20 or 24 bits at the input
The DAT3000C01 module can operate with the full 24 bits of the sampled audio
received or keep only the 20 most significant bits. This selection is made via switch 1
of S1 as shown in the following table:
MODE SW1
20 bits OFF
24 bits ON
3.5.2. Selection of 20 or 24 bits at the output
The AES/EBU stream samples delivered at the outputs of the DAT3000C01 can be 20
or 24 bits. This selection is made via switch 2 of S1 as shown in the following table:
LEVEL SW2
0 dBfs OFF
-18 dBfs ó -20 dBfs ON
3.5.3. Selection of the external reference
The word-clock and black burst external reference inputs use the same connectors on
the rear board and the type of signal that will be applied must be programmed. These
inputs provide loop-through, but they can be internally loaded with 75Ω if
loop-through functionality is not needed. These functions are programmed using
program jumpers J7 and J8 according to the diagram in the silkscreening.
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Albalá Ingenieros | Manual DAT3000C01
3.5.4. Termination of the delay input
The delay input provides loop-through but can also be internally loaded with 75Ω
using jumper J4 as shown in the silkscreening.
3.5.5. Termination of the digital audio inputs
The digital audio inputs are connected using balanced lines with loop-through. If a
110Ω termination for these inputs is needed, this can be done using program
jumpers J2, J3 and J6, which correspond to the reference inputs, the input to Stream 1
and the input to Stream 2, respectively. To set the 110Ω termination, put the
corresponding jumper between the pines labeled 110.
3.5.6. Selection of automatic mode or manual mode for the reference input
The DAT3000C01 module has two operating modes for selection of the reference
input and the sampling frequency: automatic or manual. In automatic mode, the
reference input and the sampling frequency are adjusted automatically based upon a
prioritized set of criteria. In manual mode the user selects the desired reference input
and the sampling frequency for the converter. Selection of the operating mode is
made via switch 3 of S1 as shown in the following table:
MODE SW3
AUTOMATIC OFF
MANUAL ON
The DAT3000C01 can also operate without an external reference. In such cases
manual mode must be used to set the sampling frequency and any selection of the
reference inputs is ignored.
In manual mode the reference input is selected using switches 4 and 5 of S1 as shown
in the following:
REFERENCE SIGNAL SW4 SW5
AES/EBU (AES11) OFF OFF
625 BLACK-BURST lines ON OFF
525 BLACK-BURST lines OFF ON
SPDIF-2 WORD-CLOCK ON ON
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Albalá Ingenieros | Manual DAT3000C01
3.5.7. Selection of the sampling frequency
In automatic mode, the sampling frequency of the AES/EBU signal at the outputs of
the module is the same as that of the reference input to which the module is
synchronized. If the reference input is a video signal, the DAT3000C01 outputs a
48kHz sampling frequency signal. If a different output sampling frequency is desired
then the unit should be set to manual mode and the frequency set using switches 6, 7
and 8 as shown in the following table:
SAMPLING FRECUENCY SW6 SW7 SW8
32kHz OFF OFF OFF
44,1kHz ON OFF OFF
48kHz OFF ON OFF
64kHz ON ON OFF
88,2kHz OFF OFF ON
96kHz ON OFF ON
VARISPEED ON ON ON
Varispeed operation is only possible in manual mode and when the reference input is
AES/EBU. To use varispeed mode, set the switches of S1 as shown in the following
table:
S1 SELECTIONS FOR VARISPEED MODE
SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8
X X ON OFF OFF ON ON ON
The DAT3000C01 comes from the factory with the following settings:
- Operation at 20 bits at the inputs and outputs.
- Automatic mode for selection of the reference input and the sampling frequency.
- Loop-through for the signal inputs.
- The coaxial reference set for black burst signal.
3.6. Installing the module in the mounting frame
The steps needed to install the DAT3000C01 module with the rear board in the
mounting frame are:
1 - Disconnect all power cords from the power supplies of the mounting frame.
2 - Remove the blank panels covering the front and rear of the empty bays chosen for
installing the DAT3000C01 in the mounting frame.
3 - Install the DAT3000P02 rear board ensuring that its 12-pin connectors are properly
aligned with the mounting frame´s mating connectors. Check that the orientation of
the board is correct by looking at the placement of the text printed on it according to
the illustration below.
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Albalá Ingenieros | Manual DAT3000C01
Details for installation of the module in 3 RU mounting frames
Details for installation of the module in 1 RU mounting frames
4 - Attach the rear board to the mounting frame with two M3 metric screws and tighten.
5 - Verify that the main board is configured according to the user requirements. The
configuration process is detailed later in the INSTALLATION section of this manual.
6 - Insert the DAT3000P01 board (main board of the DAT3000C01 module) into the front
of the mounting frame. The edges of the card slide into two plastic guides inside the
mounting frame.
7 - Affix the main board to the mounting frame using the two screws included on the
front panel.
After these steps, the module is ready to be connected to other equipment.
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Albalá Ingenieros | Manual DAT3000C01
3.7. Interconnection
The following figure shows the DAT3000C01 module rear board connector layout.
Rear view of the DAT3000C01
The DAT3000C01 module provides two loop-through inputs (STREAM 1 LOOP IN and
STREAM 2 LOOP IN) and two outputs (OUT1 and OUT2) for each digital audio section. It
also provides two loop-through inputs (AES/EBU REF. LOOP IN and REFERENCE IN
(BB/WCLK)) for reference signals and one input for a delay signal (TTL DELAY).
The rear interconnection board is not designed to withstand mechanical stress. The
wiring must be fastened properly to the frame where the mounting frame is housed to
prevent the rear board from supporting the weight of the cables.
3.7.1. Digital audio connections
Digital audio inputs are balanced and use 3.81mm pitch terminal block connectors.
The AES/EBU reference input provides loop-through but can be terminated with
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Albalá Ingenieros | Manual DAT3000C01
110Ω. This loop-through input can be used to send the signal to multiple generators.
Keep in mind that this loop introduces a 0.4dB attenuation, equivalent to a loss of 5%
of the signal amplitude. Therefore, it is not recommended to have more than five
DAT3000C01 units connected using loop-through. If more than five units will be used,
the system engineer should perform the necessary calculations based upon the
length of the cabling and the signal amplitude in order to guarantee that the signal
level at the last module in the loop is always greater than 300 mVpp.
Digital audio outputs are balanced, use 3.81mm pitch terminal block connectors and
their characteristic impedance is 110Ω.
If an output signal in AES3id format is needed, an adapter as shown in the figure can
be built. Albalá Ingenieros does not provide this adapter
TWISTED PAIR TO COAXIAL ADAPTER AS PER AES3id
For digital audio connections 110Ω characteristic impedance, two-wire shielded cable
is preferred. The GND terminal allows connection of the cable shield.
3.7.2. Connections for analog video, word-clock and the delay signal
Coaxial cabling with a characteristic impedance of 75Ω such as RG59 should be used
to connect analog video, word-clock and delay signals.
If the loop-through feature will be used to send the signal on to other equipment,
make sure that the line is properly terminated at the endpoint.
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Albalá Ingenieros | Manual DAT3000C01
4. OPERATION
This section describes the significance of the front panel indicators of the DAT3000C01
module and their remote control and monitoring ability.
4.1. Front panel description
The appearance of the front panel and the elements it contains are shown in the
following illustration.
Front panel of the DAT3000C01
The panel contains the following elements:
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Albalá Ingenieros | Manual DAT3000C01
In the LOCKED box:
AES/EBU,
CCVS,
W.CLOCK: Blue. These are the reference input indicator LEDs. Each one corresponds
to one of the three possible sync source inputs of the DAT3000C01, and
they have two brightness levels. They light up at low brightness to
indicate that a signal is present and then light up with full brightness to
indicate that the corresponding input has been selected. If an external
reference is detected but is not valid due to lack of sufficient level or an
incorrect frequency then the corresponding LED will blink.
In the two central boxes on the left:
AES1,
AES2,
44.1kHz,
48.0kHz,
96.0kHz: Green. These are the signal presence indicators for the inputs. The most
common frequencies 44.1, 48 and 96kHz have their own dedicated LEDs.
If signals with other frequencies are received then the AES1 or AES2 LEDs
light up. The frequency of the input signal is outside of the range of 32 to
96kHz then all LEDs remain off. These LEDs indicate the sampling
frequency at which the stream is being received, not the true sampling
frequency of the audio contained in the stream. Therefore, when a signal
is received at twice a given sampling frequency, for example at 192kHz,
then the LED for 96kHz lights up.
In the center box on the right:
1250ms,
1000ms,
750ms,
500ms,
250ms,
0ms,
AES1,
AES2: Green. These LEDs are the same as the previous eight and are used
together with the pushbuttons in the lower half of the panel to check and
adjust the delay of each stream.
In the lower half:
SELECT: Pushbutton. Brief presses of this button change the function of the eight
LED previously described in order to check the delay value being
introduced by the module for each stream. A single press turns on the
AES1 LED and displays the delay value for Stream 1. A second press turns
on the AES2 LED and displays the delay value for Stream 2, and a third
press returns the LEDs to their initial state, where they indicate the
presence of signal at the inputs. If the pushbutton is pressed and held for
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