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Albalá Ingenieros | Manual 

DAR3000C01

4. OPERATION

This section describes the significance of the front panel indicators of the DAR3000C01
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 DAR3000C01

The panel contains the following elements:

19

Summary of Contents for DAR3000C01

Page 1: ...DAR3000C01 AES EBU DIGITAL AUDIO REFERENCE SIGNAL GENERATOR Version 1 0 Albalá Ingenieros S A Medea 4 28037 Madrid Spain 12 December 2016 Albalá Ingenieros S A All rights reserved ...

Page 2: ...DAR3000C01 ...

Page 3: ...t 14 3 5 4 Selection of the sampling frequency 14 3 5 5 Selection of the external reference input 15 3 5 6 Selection of the termination for the AES EBU reference input 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 Analog video and word clock connections 18 4 OPERATION 19 4 1 Front panel description 19 4 2 Functional descriptio...

Page 4: ...DAR3000C01 ...

Page 5: ...nal in order to create dips for identification of the audio channels The module accepts reference signals of three different types PAL or NTSC video signals black burst audio sampling frequency signals word clock and AES EBU digital audio signals as per AES11 If no signal is available at any of the inputs the module outputs a signal with a user selectable frequency of 32 44 1 48 64 88 2 or 96 kHz ...

Page 6: ...ides loop through is balanced and is transformer isolated Word clock and black burst reference inputs provide loop through and are coaxial Silence and tone generation capabilities Tones can be generated with frequencies of 400 Hz or 1 kHz levels of 0 18 and 20 dBfs and include optional dips for channel identification 20 or 24 bit audio stream generation Both the sampling frequency and the referenc...

Page 7: ...Albalá Ingenieros Manual DAR3000C01 1 3 Block diagram 7 ...

Page 8: ...Albalá Ingenieros Manual DAR3000C01 DAR3000C01 8 ...

Page 9: ... without external reference Jitter 70 psRMS Maximum frequency error 1 ppm Grade 1 according to AES11 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 Pl...

Page 10: ...P Word clock reference signal output Connector BNC Impedance 75 Ω Sampling rate 32 kHz 44 1 kHz 48 kHz 64 kHz 88 2 kHz and 96 kHz Number of outputs 2 Voltage levels with loaded output VOL max 0 2 V VOH min 2 2 V General Maximum power supply current 450 0 mA Operating temperature range 0 50 C Approximate weight 325 g 10 ...

Page 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...

Page 12: ...s 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 DAR3000C01 modules as will fit in them 3 5 Module configuration The DAR3000C01 module provides both microswitches and program jumpers that should be set before installation in a mounting frame ...

Page 13: ...module generates audio tones their level can be set to 0 dBfs 18 dBfs or 20 dBfs 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 Selection of 18 dBfs 20 dBfs the frequency of the audio tones and the insertion of periods of silence for channel identification can only be done via the module s control software and this requires that ...

Page 14: ...t is selected using switches 4 and 5 of S1 as shown in the following REFERENCE SIGNAL SW4 SW5 AES EBU AES11 OFF OFF 625 VIDEO lines ON OFF 525 VIDEO lines OFF ON SPDIF 2 WORD CLOCK ON ON 3 5 4 Selection of the sampling frequency In automatic mode the sampling frequency of the AES EBU signal delivered is the same as the input reference signal the module is synchronized to If the reference input is ...

Page 15: ...is needed program it using jumper J2 as shown in the silkscreening The DAR3000C01 comes from the factory with the following settings 20 bit sampling frequency at the outputs Automatic mode for selection of the reference input and the sampling frequency Loop through activated for the reference inputs Audio tone level of 0 dBfs 3 6 Installing the module in the mounting frame The steps needed to inst...

Page 16: ...nfigured according to the user requirements The configuration process is detailed later in the INSTALLATION section of this manual 6 Insert the DAT3000P03 board main board of the DAR3000C01 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 ...

Page 17: ...d REFERENCE IN BB WCLK and two audio frequency signal outputs WORD CLOCK OUT1 and WORD CLOCK OUT2 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 us...

Page 18: ...00 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 ca...

Page 19: ...ont panel indicators of the DAR3000C01 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 DAR3000C01 The panel contains the following elements 19 ...

Page 20: ...these LEDs In the TEST box L R Green This LED lights up when a tone is present in the two channels of the audio stream L Green This LED lights up when a tone is present in this channel only and the other channel outputs silence R Green This LED lights up when a tone is present in this channel only and the other channel outputs silence TEST Pushbutton This button selects the insertion of a test ton...

Page 21: ...needed the module must be set to varispeed mode In such cases the sampling clock frequency is obtained directly from the received reference AES EBU stream Varispeed operation can only be used in manual mode In automatic mode the module can determine whether the video reference signal uses 525 lines or 625 lines therefore no selection of this property is required 4 2 2 Tone insertion operation Alth...

Page 22: ...ings of the configuration switches of the module It is important to keep in mind that these tones are synthesized based upon the sampling frequency and therefore in varispeed mode the frequency synthesized is provided by the following formula ftone_nom is the nominal frequency for the tones that the module can generate and is either 400 Hz or 1 kHz fref is the sampling frequency of the AES EBU ref...

Page 23: ...channels inserted into a video group 4 2 3 The status channel The DAR3000C01 is an audio reference signal generator that creates its own status channel Only the operating frequency is extracted from the the AES EBU reference input and no other bits from the reference signal are used The status channel bits are all user configurable and are stored in the module s non volatile memory To access these...

Page 24: ...ion The DAR3000C01 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...

Page 25: ...x00 0x01 Y N Allows selecting the number of bits 0 20 1 24 0DB_LEVEL 0x00 0x02 Y N Allows selecting the output audio level 0 0 dBFS 1 18 20 dBFS MODE 0x00 0x04 Y N Allows selecting the reference selection mode 0 Auto 1 Manual INPUT_REF 0x00 0x18 Y N Allows selecting the reference input in manual mode 0 AES 1 BB 625 2 BB 525 3 WCLK OUTPUT_FREQ 0x00 0xE0 Y N Allows selecting the output samplign freq...

Page 26: ...gnal detected 0 No 1 Yes OUT_FREQ 0x00 0x70 Y N Indicates the actual output sampling frequency 1 32 kHz 2 44 1 kHz 3 48 kHz 4 64 kHz 5 88 2 kHz 6 96 kHz AES_DET_FREQ 0x01 0x07 N N Indicates the AES reference detected frequency 0 No signal or 32 kHz 1 32 kHz 2 44 1 kHz 3 48 kHz 4 64 kHz 5 88 2 kHz 6 96 kHz 7 Other or 96 kHz WCLK_DET_FREQ 0x01 0x70 N N Indicates tje Wordclock reference detected freq...

Page 27: ...ampling frequency between 32 kHz and 192 kHz Today the interface is also used as a framework to transmit digital 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 dB Logarithmic measurement to express ratios of p...

Page 28: ...Albalá Ingenieros Manual DAR3000C01 DAR3000C01 28 ...

Page 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...

Page 30: ...Albalá Ingenieros Manual DAR3000C01 DAR3000C01 30 ...

Page 31: ...Albalá Ingenieros Manual DAR3000C01 7 VERSIONS Ver Date Description 0 0 13 06 2013 Preliminary Version 1 0 12 12 2016 First version ...

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

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