Albalá Ingenieros, S.A. AEM3000C01 Manual de usuario
AEM3000C01
ANALOG AUDIO EMBEDDER IN SD-SDI DIGITAL VIDEO (4 CHANNELS / 1
GROUP)
Version 1.0
Albalá Ingenieros, S.A.
Medea, 4 - 28037 Madrid - Spain
03 January 2018 - © Albalá Ingenieros S.A. - All rights reserved
AEM3000C01
AEM3000C01
ANALOG AUDIO EMBEDDER IN SD-SDI DIGITAL VIDEO (4 CHANNELS / 1 GROUP)
Version 1.0
1. DESCRIPTION ...................................................................................................................... 5
1.1. The AEM3000C01 ........................................................................................................................... 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
3.6. Installing the module in the mounting frame ................................................................... 13
3.7. Interconnection ............................................................................................................................ 15
3.7.1. Electrical SDI video connections .................................................................................... 15
3.7.2. Analog audio connections ............................................................................................... 16
4. OPERATION ...................................................................................................................... 17
4.1. Front panel description .............................................................................................................. 17
4.2. Configuration from the front panel ...................................................................................... 18
4.3. The pre-processing block .......................................................................................................... 18
4.4. Module remote control and supervision ............................................................................. 20
4.4.1. Details of the AEM3000C01 registers .......................................................................... 21
5. GLOSSARY ........................................................................................................................ 25
6. REGULATIONS .................................................................................................................. 27
7. VERSIONS ......................................................................................................................... 29
AEM3000C01
Albalá Ingenieros | Manual AEM3000C01
1. DESCRIPTION
1.1. The AEM3000C01
The AEM3000C01 module is an embedder of analog audio into SDI video signals as per
SMPTE 272M-AC. The embedded audio accepted by the module should have a sampling
frequency of 48kHz and should be synchronized with the video signal. Conversion of the
audio from digital to analog is performed with wide dynamic range, low distortion 24 bit
A/D converters.
The AEM3000C01 operates with binary encoded video at 270 and 360Mbit/s for both
525 and 625 line systems.
The module provides a pushbutton and various LEDs on the front panel in order to select
and indicate into which group the audio will be embedded. This and other operations
can also be performed remotely by installing a communications controller in the same
mounting frame as the AEM3000C01.
The module includes an audio pre-processing block that can perform level adjustment,
polarity inversion for each channel and assignment of the channels. All of these
functions are performed in the digital domain, previous to the A/D conversion. In order
to access the functions of this block a communications controller must be installed in
the same mounting frame.
The reserved fields of the SDI stream for (EDH) error detection are both processed and
updated completely.
It is possible to monitor the AEM3000C01 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 AEM3000C01 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.
5
Albalá Ingenieros | Manual AEM3000C01
1.2. Features
• Four channel analog audio embedder for SD-SDI digital video as per SMPTE 272M.
•Provides one SD-SDI input with automatic equalizer capable of compensating 300+
meters of Belden 8281 cable.
• Provides two SD-SDI outputs with embedded audio.
• The four analog audio inputs are embedded in the same group.
• High impedance, balanced analog audio inputs.
• Wide dynamic range A/D conversion.
• 48kHz audio sampling synchronous with the digital video.
• Full scale level adjustment between +15 and +28dBu in 1dB steps.
• Digital audio level control from -39.5 to +24dB in 0.5dB steps.
•Includes an audio pre-processing block with a 4x4 matrix, level adjustment and polarity
inverters.
• Selectable 20 or 24 bit audio insertion using extended audio packets.
• Front panel indicator for SDI signal absence and EDH errors.
• Front panel indicators for overload and silence in the analog audio inputs.
• Front panel indicator for groups present in the incoming SD-SDI signal.
• Front panel button for selection of audio group for insertion.
•Ability to remove all audio groups contained within the incoming SDI signal before
embedding.
•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 AEM3000C01 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 AEM3000C01 modules.
• Low power.
6
Albalá Ingenieros | Manual AEM3000C01
1.3. Block diagram
7
Albalá Ingenieros | Manual AEM3000C01
AEM3000C01
8
Albalá Ingenieros | Manual AEM3000C01
2. SPECIFICATIONS
SD-SDI digital video signal input
Connector BNC
Impedance 75Ω ± 1 %
Return loss >15dB up to 360 MHz
Number of inputs 1
Equalizable cable length:
Belden 8281 >300 m
SD-SDI digital video signal output
Connector BNC
Impedance 75Ω ± 1 %
Return loss >15dB up to 360 MHz
Number of outputs 2
Amplitude 800mVpp ± 10 %
Rise and fall time (20 % - 80 %) 1 ns typ.
SD-SDI digital video signal
Signal format According to SMPTE ST 259 standard
Bit rate 270 or 360Mbit/s
Embedded audio format According to SMPTE 272M standard,
48kHz synchronous with video
Input to output delay 630 ns
Analog audio signal input
Connector Plug-in terminal,
3.81mm pitch
Impedance >24 kΩ
Type Active balanced
Number of inputs 4 monophonic channels
Common mode rejection ratio (CMRR):
at 50 Hz >75 dB
at 20 kHz >75 dB
Maximum common mode range ±12 V
Maximum input level 24 dBu
Analog to digital converter
Type Sigma-delta,
x128 oversampling
Number of bits 24
Sampling rate:
Standard 48kHz synchronous with video
Full scale level 15 to 24dBu, 1dB steps
9
Albalá Ingenieros | Manual AEM3000C01
3 dB cuttoff frequency:
Lower <20 Hz
Upper 0.49xfs
Noise:
Unweighted <- 103dBFS measured with a 1kHz,
- 60dBFS tone
Harmonic distortion plus noise (THD+N) <- 100dB measured with a 997Hz,
- 1dBFS tone
General
Maximum power supply current + 500 / - 420 mA
Operating temperature range 0 .. 40 °C
Approximate weight 375 g
10
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