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Albalá Ingenieros | Manual 

AAC3008C01

6. REGULATIONS

AES11

 (2009)

AES recommended practice for digital audio engineering - Synchronization of digital
audio equipment in studio operations.

AES3

 (2003)

AES Recommended practice for digital audio engineering - Serial transmission format
for two-channel linearly represented digital audio data.

See also: EBU Tech. 3250-E, ITU-R BS.647-2

AES3id

 (1995)

AES information document for digital audio engineering - Transmission of AES3
formatted data by unbalanced coaxial cable.

EBU Tech. 3250-E

 (1992)

Specificacion of the digital audio interface.

See also: AES3, ITU-R BS.647-2

ITU-R BT.470-6

 (1998)

Conventional analogue television systems.

See also: ITU-R BT.1700, SMPTE 170M

29

Содержание AAC3008C01

Страница 1: ...AAC3008C01 QUAD ANALOG AUDIO TO AES EBU DIGITAL AUDIO CONVERTER Version 1 0 Albalá Ingenieros S A Medea 4 28037 Madrid Spain 23 June 2016 Albalá Ingenieros S A All rights reserved ...

Страница 2: ...AAC3008C01 ...

Страница 3: ...audio connections 14 3 7 2 Analog audio connections 15 3 7 3 Analog video and word clock connections 15 3 7 4 Delay signal connections 15 4 OPERATION 17 4 1 Front panel description 17 4 2 Functional description 18 4 2 1 Operation in 20 or 24 bits 18 4 2 2 Normal and Silence operation 19 4 2 3 Description of the delay line 19 4 2 4 Selection of the sampling frequency 20 4 2 4 1 Automatic Mode opera...

Страница 4: ...AAC3008C01 ...

Страница 5: ...rnal reference and generating a sampling frequency selectable from the following standard values 32 kHz 44 1 kHz 48 kHz 64 kHz 88 2 kHz and 96 kHz The module includes memory in order to delay the audio Each digital stream each audio pair can be configured for an independent delay Using an external delay input a variable delay can be applied to each stream for applications that require synchronizat...

Страница 6: ...epts three different reference signal types black burst word clock and AES EBU digital audio The AES EBU reference input is intended for use with shielded twisted pair cable and is transformer isolated Includes a TTL level delay input and a memory buffer that allows each channel to be delayed by up to 16363 samples Both the sampling frequency and the reference input can be selected manually or aut...

Страница 7: ...Albalá Ingenieros Manual AAC3008C01 used for this purpose then up to 12 modules can be installed One UR3100 mounting frame can house up to three AAC3008C01 modules Low power 7 ...

Страница 8: ...Albalá Ingenieros Manual AAC3008C01 1 3 Block diagram 8 ...

Страница 9: ...oversampling fs 48 kHz Type Sigma delta x64 oversampling fs 64 kHz Number of bits 24 Sampling rate Standard 32 kHz 44 1 kHz 48 kHz 64 kHz 88 2 kHz and 96 kHz Full scale level 14 to 24 dBu 1 dB steps 3 dB cuttoff frequency Lower 20 Hz Upper 0 49xfs Noise Unweighted 107 dBFS measured with a 1kHz 60 dBFS tone A weighted 110 dBAFS measured with a 1kHz 60 dBFS tone Harmonic distortion plus noise THD N ...

Страница 10: ...30 dB up to 5 MHz Type Passive Loop Through 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 ...

Страница 11: ...ns 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...

Страница 12: ...8C01 module has a program jumper for selecting the impedance of the AES EBU reference input This jumper should be set before installing the module in the mounting frame Program jumper J8 has two positions One position 110 Ω loads the input with 110 Ω whereas the second LOOP leaves the input in a high impedance state 3 6 Installing the module in the mounting frame The steps needed to install the AA...

Страница 13: ...nfigured according to the user requirements The configuration process is detailed later in the INSTALLATION section of this manual 6 Insert the AAC3008P01 board main board of the AAC3008C01 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 ...

Страница 14: ...STREAM 2 OUT STREAM 3 OUT STREAM 4 OUT two inputs for external reference signals AES11 REF IN WCLK BB REF IN and a delay input DELAY IN 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 Th...

Страница 15: ...er AES3id levels then a simple adapter can be built using the following figure TWISTED PAIR TO COAXIAL OUTPUT ADAPATER BASED ON AES3id 3 7 2 Analog audio connections Analog audio inputs are high impedance balanced and use 3 81 mm pitch terminal block connectors If another termination resistance is required a resistor with the desired termination value can be externally mounted between the and term...

Страница 16: ...Albalá Ingenieros Manual AAC3008C01 AAC3008C01 16 ...

Страница 17: ...ont panel indicators of the AAC3008C01 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 AAC3008C01 The panel contains the following elements 17 ...

Страница 18: ...rter In this case the LED lights up continuously Overload The digital signal at the output has exceeded the established overload threshold This threshold comes from the factory set to 1 dBfs and can be modified using the control software For overload the LED blinks In the SAMPLING FREQUENCY box 48 0 kHz 44 1 kHz 32 0 kHz Other Green These LED indicate the sampling frequency being used for A D conv...

Страница 19: ...igital audio output streams The delay is adjustable in steps of one sample and is set using the control software The delay that can be applied is limited by the memory available and by the sampling frequency The external delay reference input TTL DELAY can be used to add a variable delay When no signal is connected to this input the added delay is 0 ms Calculation of this variable delay is perform...

Страница 20: ... oscillator of the AAC3008C01 In this way all the standard frequencies are generated 32 kHz 44 1 kHz 48 kHz 64 kHz 88 2 kHz and 96 kHz The PLL of the AAC3008C01 will not be able to lock to any digital audio reference signals with sampling rates other than the standard ones listed and in such cases the corresponding REFERENCE LED will blink The video input accepts signals of 525 or 625 lines If thi...

Страница 21: ... The input matrix allows connection of any of the eight audio inputs to any of the eight outputs First each input can be inverted or not in phase Then the desired gain is applied to each input Finally all the signals desired for a given output are summed together The level control permits independent adjustment of each of the input signals to the matrix The adjustment range consists of 128 steps o...

Страница 22: ...ion The AAC3008C01 can optionally be remotely controlled supervised In order to perform remote configuration and supervision of the module an optional TL3000 family remote communications controller must be installed in the mounting frame The main function of the communications control module is to interface between a 10 100 Ethernet port an EIA RS232 or an EIA RS485 serial port and the internal bu...

Страница 23: ...the firmware are listed below VERSION 1 X CONTROL Name add ext msk snmp trap Description INPUT_REF 0x00 0x07 Y N Allows selecting the reference input in manual mode 0 None 1 BB 625 2 BB 525 3 WCLK 4 AES SAMPLING_FREQ 0x00 0x38 Y N Allows selecting the output samplign frequency in manual mode 0 32 kHz 1 44 1 kHz 2 48 kHz 3 64 kHz 4 88 2 kHz 5 96 kHz BITS 0x00 0x40 Y N Allows selecting the number of...

Страница 24: ...ng AES2 channel B 0 No 1 Yes MUTE_AES3_A 0x19 0x10 Y N Allows muting AES3 channel A 0 No 1 Yes MUTE_AES3_B 0x19 0x20 Y N Allows muting AES3 channel B 0 No 1 Yes MUTE_AES4_A 0x19 0x40 Y N Allows muting AES4 channel A 0 No 1 Yes MUTE_AES4_B 0x19 0x80 Y N Allows muting AES4 channel B 0 No 1 Yes INPUT_LEVEL 0x1A 0x1F Y N Allows selecting the audio full scale level OVLD_LEVEL 0x1B 0xFF Y N Allows adjus...

Страница 25: ...cates AES1 overload fail 0 OK 1 Fail CLIP_CH2 0x05 0x04 Y N Indicates channel 2A 2B clipping fail 0 OK 1 Fail OVL_CH2 0x05 0x08 Y N Indicates AES2 overload fail 0 OK 1 Fail CLIP_CH3 0x05 0x10 Y N Indicates channel 3A 3B clipping fail 0 OK 1 Fail OVL_CH3 0x05 0x20 Y N Indicates AES3 overload fail 0 OK 1 Fail CLIP_CH4 0x05 0x40 Y N Indicates channel 4A 4B clipping fail 0 OK 1 Fail OVL_CH4 0x05 0x80 ...

Страница 26: ...Albalá Ingenieros Manual AAC3008C01 AAC3008C01 26 ...

Страница 27: ... signals that may or may not be audio with linear PCM encoding The physical interface defined by the original AES EBU standard was a 110 ohm balanced line The AES3 id standard later defined the physical interface as a 75 ohm coaxial cable PLL Phase Locked Loop A feedback loop that synchronizes the phase of two signals dB Logarithmic measurement to express ratios of power dBFS dB Full Scale Level o...

Страница 28: ...Albalá Ingenieros Manual AAC3008C01 AAC3008C01 28 ...

Страница 29: ...Serial transmission format for two channel linearly represented digital audio data See also EBU Tech 3250 E ITU R BS 647 2 AES3id 1995 AES information document for digital audio engineering Transmission of AES3 formatted data by unbalanced coaxial cable EBU Tech 3250 E 1992 Specificacion of the digital audio interface See also AES3 ITU R BS 647 2 ITU R BT 470 6 1998 Conventional analogue televisio...

Страница 30: ...Albalá Ingenieros Manual AAC3008C01 AAC3008C01 30 ...

Страница 31: ...Albalá Ingenieros Manual AAC3008C01 7 VERSIONS Ver Date Description 0 0 12 11 2014 Preliminary Version 1 0 23 06 2016 First version ...

Страница 32: ...Albalá Ingenieros S A Medea 4 28037 Madrid Spain 34 913274453 www albalaing com info albalaing com ...

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