BM-A2-64MADI - Bel Digital
Contents
1. gt i Sync source select via LCD gt Audio and Data Headphone output Y4 TRS jack j Monitor SRC enable viaiLeD gt L R line outputs 2 x XLR3M Bargraph and status displays MADI Loop through output fibre MADI input fibre MADI input coax gt MADI interface MADI Loop through output coax Sync References Inputs amp Outputs Sample rate converters with bypass AES EBU Outputs AES interface AES3 id Outputs Bel Digital Group Limited BM A2 64MADI User Manual v1 0 H Front Panel Operation The BM A2 64MADI provides a very intuitive front panel interface that allows the user to view and monitor all available incoming MADI channels either as channel pairs or mono channels A MADI stream essentially consists of multiple AES channel pairs up to 32 being serially transmitted from one device to another The BM A2 64MADI intercepts these AES pairs and presents them on the front panel as 32 channel pair bargraph meters 11 It is then possible to view at a glance the audio levels of all AES pairs present within the incoming MADI stream Note each channel pair bargraph meter is a mono sum of its left and right channels Selecting a channel to monitor Use the CHANNEL PAIR SELECT rotary encoder 4 to monitor any of the available channel pairs or individual channels on the BM A2 64MADI see MONO mode selection on page 15 to find out how to select between monitori2. Channel Pair Select Rotary encoder with push action to navigate across all 32 AES channel pairs The selected channel pair is indicated by LED 12 illuminating under the selected channel pair number Pushing the encoder will return selection to the first channel pair Volume Rotary encoder with push action to control front panel speaker and headphone volume lt also controls the analogue line level outputs on the rear panel 13 and 14 Pushing the encoder will mute the speakers and outputs O Balance Rotary encoder with push action to control the monitor balance of the selected channel pair Pressing the encoder will centre the audio output Bel Digital Group Limited EEE Channel Pair L R meters Hi resolution 52 segment tri colour LED bargraph meters with peak hold Meters follow the Channel Pair Select control 4 Speakers Two high quality high output full range speakers to present the selected audio pair using the Channel Pair Select control 4 Headphone Headphone output 4 TRS output jack with speaker mute facility Valid Audio Green LED indicates the presence of a valid AES channel pair as determined by the presence of a valid audio flag in the channel status bits AES pair bargraphs Six segment bargraph meters indicating presence of audio in the channel pair each bargraph represents two channels L and R 12 Channel pair Blue LED indicates the selected c
3. DIGITAL GROUP BM A2 64MADI MADI Audio and Status Monitor Sun n Gm m 0 EEEE DD Gm m 6 enna m 12 Su u un Bm m K 18 Sun DD Gm m KS A 24 zum m mm m J o 36 Sean EME A2 SERIES 7 8 64MADI K Sey 123 4 5 67 gt x Ch Pair geo m m m m m X QLS Psu 1Q HEADPHONES Ss aN KL i s y C MADI DA Installation and User Guide Reference To Statement Of Conformity This document confirms that products bearing the CE label meet all the requirements in the EMO directive 2004 108 EC and LV directive 2006 95 EC laid down by the Member States Council for adjustment of legal requirements Furthermore the products comply with the rules and regulations from 30 August 1995 referring to the electromagnetic compatibility of devices Bel Digital Group BM A2 64MADI units bearing the CE label comply with the following harmonised or national standards EMC BS EN 55103 1 2009 BS EN 55103 2 2009 Safety BS EN 60950 1 2006 ed 2 A1 2010 Insulation Class1 2 BM A2 64MADI User Manual v1 0 Instructions for Disposal of WEEE by Users in the European Union The symbol shown here is on the product E Or on its packaging which indicates that this product must not be disposed of with other waste Instead it is the user s responsibility to dispose of their waste equipment by handing it over to a designated collection point for recycling of waste electrical and electronic equipment The
4. 29 The power supply cord i e conductor coupler IEC60320 C13 and plug combination must be suitably rated for apparatus and the country of use meeting local electrical requirements A power supply cord with a rating of not less than 125 of current rating is suitable The minimum rating for the power supply cord at 110 230V ac to be 1A Bel Digital Group Limited Installation 30 When installing this apparatus either fix it into a standard 19 rack or place the apparatus on a secure level surface When this apparatus is rack mounted fit all rack screws 31 Ensure that no strain is placed on the cables connecting to this apparatus Ensure also that such cables are not placed where they can be stepped on pulled or tripped over 32 Do not operate this apparatus whilst it is covered or boxed in any way Bel Digital Group Limited Important Safety Precautions CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL CAUTION RISK OF ELECTRIC SHOCK THIS EQUIPMENT HAS MORE THAN ONE POWER CORD TO REDUCE THE RISKS OF ELECTRIC SHOCK DISCONNECT BOTH POWER SUPPLY CORDS BEFORE SERVICING The lightning flash with arrowhead symbol within equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure
5. Limited Channel Status Byte 5 DARS Hidden Information Multiple rate Sampling Frequencies BITS 7 T00 RESERVED Set to logic O until further defined Channel Status Byte 23 CRC data BITS 7 TOO CHANNEL STATUS DATA CYCLIC REDUNDANCY CHECK CHARACTER CRCC Generating polynomial is G x x xf x x 1 The CRCC conveys information to test valid reception of the entire channel status data block bytes O to 22 inclusive For serial implementations the initial condition of all ones should be used in generating the check bits with the LSB transmitted first There is no default this field shall always be coded with a correct CRCC Note Please refer to the AES standard for digital audio Digital input output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode AES3 2 2009 for full details concerning Channel Status implementation Bel Digital Group Limited BM A2 64MADI User Manual v1 0 23 Technical Specifications Input 1 x SC socket multi mode single mode option available 1 x Coaxial 75Q BNC Loop through output 1 x SC socket multi mode single mode option available 1 x Coaxial 75Q BNC Format Up to 64 channels compliant with AES1 Oid 2008 Sample frequency 44 1 kHz 48 kHz 88 2 kHz 96 kHz Higher frequency protocol SMUX and High Speed for 88 2 kHz and 96 kHz sample frequencies Data Rate 125 Mbps 25ppm AES EBU outputs AES3Hd output
6. Sample Rate Converters SRCs 14 MADI input source selection 14 MADI input mode selection 14 MONO mode selection eens 15 Appendix ee 18 MADD Flags ee 16 MADI Audio data 2444Hr iaaea 17 AES Channel Status Bytes 17 Channel Status Byte O eenenenen 18 Channel Status Byte 1 eesenenen 19 Channel Status Byte 2 0 2 eee 20 Channel Status Byte 3 eect eee 21 Channel Status Byte A 2 0 0 0 eee 22 Channel Status Byte 5 0 0 0 eee 23 Channel Status Byte 23 20 0 0 eee 23 Technical Specifications 24 Bel Digital Group Limited BM A2 64MADI User Manual v1 0 3 Important Safety Instructions Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Do not expose this apparatus to rain or moisture Clean only with a dry cloth oo ar wm Do not block any ventilation openings Install with accordance with the manufacturer s instructions 9 No naked flames such as lighted candles should be placed on the apparatus 10 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 11 There are no user adjustments or user servicable items inside this apparatus Do not remove the covers of this
7. follow after the audio data the most significant bits See below for details of each MADI flag M SB moe The BM A2 64MADI provides a MADI Flag page in the MADI Data display Rotate the MENU encoder to scroll to the MADI Flag page Example MADI Flag page The display indicates both the left A and right B channels of the selected channel pair The bits increment from right to left So Bit O is on the right and bit 31 is on the left Audio data is represented by the two dots in the middle of the data sequence Audio data can be interrogated in MADI Audio data pages LSB Audio data w Iu N N EREIBSERFGENEEREN 16 BM A2 64MADI User Manual v1 0 Erra MADI frame synchronisation bit When set to 1 this indicates the start of a MADI stream i e ch1 MADI channel active When set to 1 this indicates an active channel in the MADI stream AES3 subframe A B Distinguishes between Left O and Right 1 channels of a channel pair AES3 Channel Status block start A value of 1 indicates the first frame of the AES3 block AES3 Validity A value of O indicates that valid audio is present AES3 User bit This value is determined by the transmission device AES3 Channel Status bit The value of this bit can be interrogated in the Channel Status displays AESS Parity bit Parity bit for error correction purposes Bel Digital Group Limited MADI Audio data Audio data within a MADI stream can be 16 20 or 24 bi
8. source is determined by the sync source selected Sample Rate Converters SRCs As with all operations involving digital audio it will generally be desirable for the audio outputs of the BM A2 64MADI to be synchronised in frequency and or phase with a master reference clock which will also synchronise all other digital audio devices in the facility However it may be that the incoming MADI stream requires re synchronising to a different house clock such as that in an outside broadcast vehicle for example To achieve this BM A2 654MADI includes a Sample Rate Converter SRC for each converted AES pair The SRCs may be switched in or out from within the Main Configuration Display When enabled the SRCs re clock the audio data against the sync reference at the REF IN connector ensuring that the word blocks in the data are phase locked exactly to the reference clock The BM A2 64MADI allows the user to select a reference clock source to suit the infrastructure of the facility and the nature of the transfer process Note Passing Dolby encoded material through sample rate converters will corrupt the Dolby bitstream Press the Menu encoder again to move the pointer to the SRC section Note This function is to synchronise the incoming MADI source to a local clock The sample rate would remain the same Rotate the encoder to select between FF Sample rate converters switched off r Sample rate converters sw
9. DI can simultaneously monitor and convert up to 64 audio channels embedded in the MADI stream and provide them as both AES EBU and AES3 id outputs MADI inputs are provided as fibre on an SC type connector multi mode and coaxial on BNC The characteristic impedance of the coaxial input is 75 ohms The selected MADI source is also available as both fibre and coaxial outputs to simplify the connection of further equipment The co axial MADI output is on a BNC socket and is compliant with AES10id 2008 The characteristic impedance is 75 ohms at a nominal data rate of 125Mbps Transmission distances up to 50 m are generally achievable The fibre loop through output is provided on an SC type connector Recommended fibre types are 62 5 125 um or 50 125 um multimode Transmission distances of at least 1000 m are achievable Note A single mode fibre option is available but only at time of order Bel Digital Group Limited AES EBU Outputs The 64 audio channels converted from the MADI input are available as 32 AES EBU digital audio output pairs on four rear panel 25 way female Dsub connectors 15 Appropriate channel numbers are screenprinted on the rear panel adjacent to each connector The outputs are balanced and are compliant with AES3 1992 The diagram below provides the pinout which is Tascam digital compatible CHANNEL PAIR PIN OUTPUT n 1 Be foa e fe SSS n O 8 16 24 To aid installation an optional AE
10. MADI channels to balanced AES EBU and unbalanced AES3 id outputs e Can convert from SMUX MADI to high speed AES e MADI input available as both copper BNC and optical SC e MADI loop through plus fibre to coax or coax to fibre conversion e MADI output conforms to AES10id 2008 AES3 output to AES3 1992 e Transparent to Dolby D E with SRC OFF e Switchable sample rate conversion SRC on all inputs to resync to local house clock maintaining same sample frequency e Sync to external wordclock external AES3 video black and burst or MADI e Sync reference outputs in wordclock and AES3 formats e Two independent PSUs with separate IEC inputs for redundancy Bel Digital Group Limited Front Panel Description MADI AUDIO AND DATA MONITOR CHANNEL PAIR 18 19 20 12 23 24 mu n a 29 30 31 32 nm sous PSU 1Q 82 MADI DATA VOLUME BALANCE O CHANNEL PAIR SELECT PSU status two bi colour LEDs confirming the current status of each PSU The LEDs are green in normal operation and flash red if a PSU fault condition is detected MADI Data display a 2x16 character LCD providing interrogation of embedded information such as MADI frame data AES channel status bits and audio data plus the provision of menu features for unit configuration Menu control Rotary encoder with push action to navigate through the MADI Data display
11. MENU encoder 3 Rotating the encoder will scroll through the top level menu Main Configuration Display A MADI Flags MADI Audio Left Channel MADI Audio Right Channel MENU encoder AES Channel Status Bytes AES Channel Status Bytes 283 AES Channel Status Bytes 465 AES Channel Status CRC Vv oO m The first page of the menu is the Main Configuration Display It is from here that you configure the The following section details the available menu pages Bel Digital Group Limited Main Configuration Display Use this page to configure the BM A2 654MADI to interface with your existing audio system Main Configuration Display All settings can be altered by use of the MENU encoder To make changes first press the MENU encoder An lt icon will appear on the display and this points to the parameter that can be changed Synchronisation The BM A2 64MADI should normally be used as a slave device synchronised to an external clock reference BM A2 64MADI offers a choice of synchronisation sources The selected source is also used as reference for sample rate converters if enabled thus ALL audio outputs both in AES EBU and AES3 id formats will be locked to the selected reference With the lt icon pointing to Sync it is possible to change the synchronisation source Rotate the MENU encoder to scroll through the available options 2 Synchronise to the incoming MADI arc Synchr
12. S EBU breakout panel B0B 0 32 is available from Bel This consists of a 1U 19 panel with 16 XLR3M connectors fitted 32 channels BM A2 64MADI User Manual v1 0 9 AES3 id Outputs The 64 audio channels converted from the MADI input are also available as 32 AES3 digital audio outputs on the rear panel 37 way female Dsub connector 16 The outputs are unbalanced AES3 id but are compliant with AES3 1992 in all other respects The table below provides the pinout CHANNELS AES 1 Chs 162 AES 2 AES 5 AES 6 AES 9 AESIO AES 13 MES 14 AES 17 AES 18 AESP AES 22 AES 25 AES 26 AES 29 AES 30 ve nn ve e AES 3 AES 4 AES 7 MESE AES 11 AES 12 AES 15 AES 16 AES 19 AES 20 AES 23 AES 24 AES 27 AES 28 AES 31 AES 32 ee ae BF N gt o nm oa 3a a o Oo oO ew N n c Z O 10 BM A2 64MADI User Manual v1 0 Note that each AES output carries 2 audio channels To aid installation an optional AES3 id Signal Break Out panel ASBO is available from Bel This consists of a 1U 19 panel with 32 BNC sockets prewired to a 37 way Dsub plug This may be mounted at the front or rear of the rack and greatly simplifies wiring ETHERNET Port The BM A2 64MADI includes a standard RJ45 Ethernet port 19 This functionality is for firmware updates Bel Digital Group Limited Setting Up amp Operation Block Diagram L R speaker outputs Input source select via LCD
13. apparatus doing so will invalidate your warranty 12 Adjustments or alterations to this apparatus may affect the performance such that safety and or international compliance standards may no longer be met 13 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Caution 14 Hazardous voltages may be present inside this apparatus 15 Do not operate this apparatus with the covers removed 16 To reduce the risk of electric shock do not perform any servicing other than that contained in these Installation Instructions unless you are qualified to do so Refer all servicing to qualified service personnel and ensure that all power cords are disconnected when servicing this apparatus 17 Only use attachments accessories specified by the manufacturer 4 BM A2 64MADI User Manual v1 0 Power Safety 18 This apparatus is fitted with a universal power supply approved and certified for operation in this apparatus There are no user replaceable fuses 19 An external over current protection device is required to protect the wiring to this apparatus This protection device must be installed according to current wiring regulations In certain countries this fu
14. ation is beyond the scope of this user manual Such information is readily available and can also be purchased directly from the AES website www aes org AES3 2 2009 AES standard for digital audio Digital input output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode Channel Status Byte O Basic Audio Parameters BIT 0 USE OF CHANNEL STATUS BLOCK Sta za Consumer use of channel status block ate Professional use of channel status block LINEAR PCM IDENTIFICATION Stat Audio sample word represents linear PCM samples ate Audio sample word used for purposes other than linear PCM samples BITS 432 AUDIO SIGNAL EMPHASIS Emphasis not indicated Receiver defaults to no emphasis with manual override enabled No emphasis Receiver manual override is disabled 011 50 us 15 us emphasis see ITU R BS 450 Receiver manual override States is disabled ITU T J 17 emphasis with 6 5 dB insertion loss at 800 Hz Receiver manual override is disabled All other states of bits 2 to 4 are reserved and are not to be used until further defined an 5 LOCK INDICATION 0 Default Lock condition not indicated State Fd Source sampling frequency unlocked BITS SAMPLING FREQUENCY Sampling frequency not indicated Receiver default to interface frame rate and manual override or auto set is enabled States 48 kHz sampling frequency Manual override
15. d for maximum reliability in professional broadcast live and production environments It requires virtually no configuration on installation or adjustment in normal use This manual covers the BM A2 54MADI s connections and indications including its various options for monitoring and synchronisation Please keep the manual in a safe place once you have installed the unit Important Please do take the time to register your BM A2 54MADI with Bel Digital Group Ltd by emailing us the units serial number and your contact details to info beldigital com Thank you Environment The BM Ae 64MADI s range of operating temperature and relative humidity RH are as follows Temperature 5 C to 40 C RH Operating 20 to 80 What s In The Box Unpacking Unpack the BM A2 64MADI with care It is always a good idea to store all packaging if practical in case you ever need to return the unit to Bel for any reason The shipping carton should contain the items listed below Please contact your distributor immediately if any of them are missing or damaged e BM A2 64MADI e Instruction manual e 2x IEC connector retaining clamp 6 BM A2 64MADI User Manual v1 0 BM A2 G4MADI Main Features e 64 channel audio monitoring plus metering e Single or two channel monitoring options e Operates with sample rates from 44 1 kHz to 96 kHz e Supports high speed and SMUX protocols e Comprehensive MADI status monitor e Converts all
16. er is the numeric value of these four bits plus one with bit O as the least significant bit Note Please refer to the AES standard for digital audio Digital input output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode AES3 2 2009 for full details concerning Channel Status implementation Bel Digital Group Limited BM A2 64MADI User Manual v1 0 21 Channel Status Byte 4 DARS Hidden Information Multiple rate Sampling Frequencies BITS 8 DIGITAL AUDIO REFERENCE SIGNAL 00 No a reference signal default Grade 1 reference signal see AES1 1 States 2 2 reference signal see AES1 1 2 and not to be used until further defined er 2 INFORMATION HIDDEN IN PCM SIGNAL le ai No indication default State 1 Audio sample word contains additional information in the least significant bits see AES55 ans 6es43 SAMBLNGEREGUENGy SAMPLING FREQUENCY SCALING FLAG o0 e No scaling default State 1 Sampling frequency is 1 1 001 times that indicated by byte 4 bits 3 to 6 or by byte O bits 6 to 7 Note Please refer to the AES standard for digital audio Digital input output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode AES3 2 2009 for full details concerning Channel Status implementation 22 BM A2 64MADI User Manual v1 0 Bel Digital Group
17. hannel s for monitoring BM A2 64MADI User Manual v1 0 7 Rear Panel Description C Model Serial No RISK oF Sere mer LINE OUT in MADI out MADE IN THE EC PSU 2 POWER RATINGS AC 50 60 Hz oO o O ESTER O 100 240 V 000000000000 ET 0 5 0 3A ooooo00000000 0000000000000 00000000000000000 D 000000000000 0 Oloooooooooo00 OT00000000000000000 o Piel 33 48 AES EBU BALANCED OUTPUTS 49 64 AES UNBALANCED OUTPUTS ETHERNET RIGHT Line output XLR which carries the same audio as the right speaker fixed level D LEFT Line output XLR which carries the same audio as the left speaker fixed level AES EBU BALANCED OUTPUTS Four 25 way female Dsub ports wired to Tascam format Providing balanced AES outputs of all the available MADI channels AES UNBALANCED OUTPUTS 37 way female Dsub connector providing unbalanced AES3 id outputs of all available MADI channels 17 OUT Optical MADI output SC connector IN Optical MADI input SC connector ETHERNET Ethernet port RJ45 REF IN External synchronisation reference input BNC amp WK OUT Derived wordclock output from selected reference input BNC 22 AES OUT Derived AES3 sync output from selected reference input BNC amp IN Coaxial MADI input BNC amp OUT Coaxial MADI output BNC 25 PSU AC inputs 2 x IEC sockets 8 BM A2 64MADI User Manual v1 0 Bel Digital Gro
18. low maximum code Reserved for future use Note Please refer to the AES standard for digital audio Digital input output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode AES3 2 2009 for full details concerning Channel Status implementation 20 BM A2 64MADI User Manual v1 0 Bel Digital Group Limited Channel Status Byte 3 Multichannel Modes MULTICHANNEL MODE ee 0 O Undefined multichannel mode default ate Defined multichannel modes The definition of the remaining bit states depends on the state of bit 7 Either BITS 6 TO O CHANNEL NUMBER WHEN BYTE 3 BIT 7 ISO Walde The channel number is the numeric value of the byte plus one with bit O as the least significant bit Or BITS 654 MULTICHANNEL MODE WHEN BYTE 3 BIT 7 IS 1 Multichannel mode O The channel number is defined by bits 3 to O of this byte Multichannel mode 1 The channel number is defined by bits 3 to O of 001 this byte Multichannel mode 2 The channel number is defined by bits 3 to O of 010 States this byte 017 Multichannel mode 3 The channel number is defined by bits 3 to O of this byte 111 User defined multichannel mode The channel number is defined by bits 3 to O of this byte All other states of bits 4 to 6 are reserved and are not to be used until further defined BITS 3T00 CHANNEL NUMBER WHEN BYTE 3 BIT 7 IS 1 Vals The channel numb
19. nction is supplied by use of a fused plug 20 If an extension power cable or adaptor is used ensure that the total power rating of the power cable and or adaptor is not exceeded 21 An external disconnect device is required for this apparatus a detachable power cord is a suitable disconnect device 22 The apparatus should be located close enough to an AC outlet so that you can easily grasp the power cord plug at any time 23 This apparatus is a Class construction and shall be connected to an AC outlet with a protective grounding connection 24 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 25 Unplug this apparatus during lightning storms or when unused for long periods of time 26 All power cords must be disconnected to isolate this apparatus completely 27 Caution To reduce the risk of electric shock plug each power supply cord into separate branch circuits employing separate service grounds 28 This equipment is not supplied with a detachable power cord The device should be connected to a power supply only of the type described in the Installation Guide or as marked on the device The power cord must be earthed and precautions should be made so that the grounding is not defeated A mains cord fitted with an IEC 60320 C13 type socket appropriate sized conductors and plug to suit local electrical requirements
20. ng channel pairs and individual channels By turning the encoder the blue channel pair select LED 12 will scroll across the channel pair bargraphs to indicate which pair is currently selected When the required channel pair or channel is selected it is routed to the the hiresolution bargraph meters 7 speakers 8 headphone output 9 and the rear panel mounted line level outputs 13 and 14 Tip Pressing the CHANNEL PAIR SELECT encoder returns selection directly to channel 1 or channel pair 1 depending on the monitoring mode selected Thus bypassing the need to scroll all the way back down to channel 1 12 BM A2 64MADI User Manual v1 0 Volume Control Rotate the VOLUME encoder 5 to alter the level applied to the front panel speakers and headphone output To mute the outputs press the encoder Mute indication is provided by the letter M being visible on the MADI Data display 2 when in the Main Configuration Display page see page 13 To unmute the audio press the encoder again MADI Data display default Mute Off MADI Data display defaut Mute On Balance Control The BALANCE control 6 differentially adjusts the level of the speaker headphone and line outputs Pressing the encoder will centre the audio output Bel Digital Group Limited Using the MENU encoder The MADI Data display provides two functions Unit Configuration MADI data interrogation These functions are accessed by use of the
21. onise to an external wordclock k source should be connected to the REF IN connector 20 on the rear panel Clock pulses should be of 5 V amplitude positive going can synchronise to a standard SD 1 V black and burst video signal The video signal should be connected to the REF IN connector The sync input auto detects NTSC or PAL standard video This should only be used with 48 kHz sample rate material HES Sere An AES3 compliant digital audio source may be used as the clock reference source Any audio data contained in the AES3 word will be ignored The audio source should be compliant with AESS id for 75 ohm coaxial transmission and connected to the REF IN connector BM A2 64MADI User Manual v1 0 13 Note When selecting any sync source other than MADI it may be necessary to enable the sample rate converters See the following section for details on how to achieve this Note A reference clock output is available at the rear panel WK OUT connector 20 and at the AES OUT connector 21 These are derived from whichever synchronisation source is selected Note Video sync also includes an internally generated 48 kHz clock if internal sync is required Synchronisation frequency display The Main Configuration Display provides a real time readout of the current synchronisation frequency Hei EE This is a useful tool as it will highlight any incoming drift away from the default synchronisation frequency The meter s
22. or your records Model Number BM A2 64MADI Serial Number 0 c ccceceeseesee eee eeseeeae eases Bel Digital Group Limited Contents Contents Reference To Statement Of Conformity 2 Important Safety Instructions cccceeeeeeeeee 4 Important Safety Precautions 5 Introduction ein 6 What s In The BOX stets ana 6 BM A2 64MADI Main Features 6 Front Panel Description sceeeeeeee ees 7 Rear Panel Description 0 0 0ceeeeeeeeee ees 8 Hardware Considerations cceeeeeeee eee ees 9 Power Supply Considerations 9 Fuses And Ratings 0ceceeeeeeeeeeeeeeeeees g Installation au ee nike 9 Unit Connections 9 MADI Inputs and Outputs c eee 9 AES EBU Outputs 0c cece nere rererere 9 AES3 1d Oitplts nnann ae 10 ETHERNET PORC saiad rainane 10 Setting Up amp Operation s sssssssssrsrrsrsirrrrenns 11 Block Diagram 0ccceeeeeeeeee nent eset eeee ees 11 Front Panel Operation 00ceceeeeeeeeees 12 Selecting a channel to monitor 12 Volume ContiOl serris nn 12 Balance Control eere 12 Using the MENU encoder 13 Main Configuration Display 13 SyNchroniSation 0ececee cece anera 13 Synchronisation frequency display 14
23. or auto set is disabled 44 1 kHz sampling frequency Manual override or auto set is disabled 32 kHz sampling frequency Manual override or auto set is disabled Note Please refer to the AES standard for digital audio Digital input output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode AES3 2 2009 for full details concerning Channel Status implementation 18 BM A2e 64MADI User Manual v1 0 Bel Digital Group Limited Channel Status Byte 1 User Bits Management BITS 3210 CHANNEL MODE Mode not indicated Receiver default to two channel mode Manual 0000 ae ts override is enabled 1000 Two channel mode Manual override is disabled 0100 Single channel mode monophonic Manual override is disabled Primary secondary mode subframe 1 is primary Manual override is 1100 disabled Stereophonic mode channel 1 is left channel Manual override is 0010 disabled 1010 Reserved for user defined applications 97110 Reserved for user defined applications Single channel double sampling frequency mode Sub frames 1 and 2 carry successive samples of the same signal The sampling frequency of the signal is double the frame rate and is double the sampling States frequency indicated in byte O but not double the rate indicated in byte A if that is used Manual override is disabled Vector to byte 3 for channel identification Single channel double sam
24. pling frequency mode stereo mode left Subframes 1 and 2 carry successive samples of the same signal The sampling frequency of the signal is double the frame rate and is double the sampling frequency indicated in byte O but not double the rate indicated in byte 4 if that is used Manual override is disabled Single channel double sampling frequency mode stereo mode right Subframes 1 and 2 carry successive samples of the same signal The sampling frequency of the signal is double the frame rate and is double the sampling frequency indicated in byte O but not double the rate indicated in byte 4 if that is used Manual override is disabled 1111 Multichannel mode Vector to byte 3 for channel identification All other states of bits O to 3 are reserved and are not to be used until further defined BITS 7654 USER BITS MANAGEMENT 0000 Default no user information is indicated 1000 192 bit block structure with user defined content Block start aligned with Channel Status block start States i i 0100 Reserved for the AES18 standard 1100 User defined 0010 User data conforms to the general user data format defined in IEC 60958 3 192 bit block structure as specified in AES52 Block start aligned with 1010 Channel Status block start 0110 Reserved for IEC 62537 All other states of bits 4 to 7 are reserved and are not to be used until further defined Note Please refer to the AES standard for digital audio Digital inpu
25. s Sampling frequency nen Noise THO Frequency response Peak accoustic leve BER Shielding Main amplifier Noise THD 80 dB w r t maximum output Sample Rate Conversion Sources Video Sync input Word clock input Word clock output Follows Word clock input DC coupled positive going pulses derived from incoming reference signal AES pit AES output Tipe pute Power consumption Connectors 2 x IEC with retaining clips PHYSICAL Dimensions w x d x h 483 x 256 x 89 mm 19 x 10 x 3 5 1U 5kg 14 ibs Breakout panels are available TASCAM is a trademark of TEAC Corporation Specifications and information contained in this manual are subject to change at any time without notice 24 BM A2 64MADI User Manual v1 0 Bel Digital Group Limited Bel Digital Group Limited 3 Horwood Court Bletchley Milton Keynes MK1 1RD United Kingdom Tel 44 0 1908 641063 Email info beldigital com URL www beldigital com
26. s the MENU encoder again and the Main Configuration Display moves to the next screen Bel Digital Group Limited MONO mode selection Two monitoring modes are available on the BM A2 64MADI two channel and mono The selection of either of these modes depends on the application e 2 CH enables monitoring of the selected AES pair through the speakers as a stereo or two channel source Rotating the Channel Pair Select encoder enables the user to scroll through and monitor each of the AES channel pairs 1 to 32 in turn e MONO changes the monitoring mode to single channel selection Turning the same encoder now only increments the channel count by 1 enabling individual channels within the MADI stream to be monitored The display indicates which channel is currently selected for monitoring Rotate the encoder to select between 2H listen to an AES pair within the MADI stream HOHO monitor individual channels Press the MENU encoder to return to the main display window Bel Digital Group Limited BM A2 64MADI User Manual v1 0 15 MADI Flags Each audio channel within a MADI stream consists of 32 bits Audio or non audio data accounts for 24 bits with the remaining being used to identify the state of the MADI stream and to preserve the original AES format It is these remaining bits that are referred to as the MADI flags Of the eight data bits four precede the audio data the least significant bits and four
27. separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For more information about where you can drop off your waste equipment for recycling please contact your local city office your household waste disposal service or where you purchased the product User s Notice and disclaimer No part of this manual may be reproduced transmitted transcribed stored in a database system or translated without the express written permission of Bel Digital Group Ltd Documentation kept by the end user for back up purposes is excluded from the above All products and corporate names mentioned in this manual may be registered trademarks or copyrights of their respective companies They are used here for indicative purposes only The information contained in this manual has been carefully checked for accuracy however no guarantee is given with respect to its correctness Bel Digital Group Ltd accepts no responsibility or liability for any errors or inaccuracies that may appear in this manual or the products and software described in it Specifications and information contained in this manual are subject to change at any time without notice 2014 Bel Digital Group Ltd All rights reserved This appliance has a serial number located on the rear panel Please record the serial number here f
28. t By using the MADI Audio display it is very easy to determine the selected channel pair s audio bit length If audio is present then the display will show rapidly changing values however it will be very easy to notice that there will be either four for 20 bit or eight for 16 bit static zeros in the display AES Channel Status Bytes Six of the most commonly used Channel Status bytes can be viewed on the BM A2 64MADI plus the Channel Status Check Sum Use the MENU encoder 2 to scroll through these pages MADI Audio data 24 bit Channel Status Byte O and 1 MADI Audio data 20 bit Channel Status Byte 2 and 3 MADI Audio data 16 bit Within the display iL contains the lower 12 bits of the audio and HiH contains the upper 12 bits There are two MADI Audio pages for the selected channel pair The first HiH and HiL represents the left channel and the second page FH and HL represents the right channel Use the MENU encoder 2 to scroll between these pages Bel Digital Group Limited Channel Status Byte 4 and 5 Channel Status Byte Check Sum An overview for each of the Channel Status Bytes above can be found in the Appendix BM A2 64MADI User Manual v1 0 17 Appendix The following Channel Status tables provide an overview of the Channel Status Byte data that the BM A2 64MADI can display Various notes and considerations must be applied to each Channel Status Byte and such inform
29. t output interfacing Serial transmission format for two channel linearly represented digital audio data Part 2 Metadata and Subcode AES3 2 2009 for full details concerning Channel Status implementation Bel Digital Group Limited BM A2 64MADI User Manual v1 0 19 Channel Status Byte 2 Auxiliary Bits Word Length and Alignment Level BITS USE OF AUXILIARY BITS Maximum audio sample word length is 20 bits default Use of auxiliary bits not defined 100 Maximum audio sample word length is 24 bits Auxiliary bits are used for main audio sample data states Maximum audio sample word length is 20 bits Auxiliary bits in this channel are used to carry a single coordination signal Reserved for user defined applications All other states of bits O to 2 are reserved and are not to be used until further defined BITS ENCODED AUDIO SAMPLE WORD LENGTH OF TRANSMITTED SIGNAL Audio sample word length if Audio sample word length if maximum length is 24 bits as maximum length is 20 bits as indicated by bits O to 2 above indicated by bits O to 2 above 800 Word length not indicated default Word length nat indicated defaut States All other states of bits 3 to 5 are reserved and are not to be used until further defined BITS INDICATION OF ALIGNMENT LEVEL 00 Alignment level not indicated Alignment to SMPTE RP155 alignment level is 20 dB below maximum de States coco 01 Alignment to EBU R68 alignment level is 18 06 dB be
30. that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating instructions and maintenance servicing instructions in the literature accompanying the appliance Important Safety Information This apparatus has no mains switch or other user operated control for disconnecting the AC mains power The mains plugs or the appliance couplers IEC sockets are used as the disconnect devices Either device must remain readily operable and accessible when the apparatus is installed for use This unit includes thermally resettable fuses that are integral to the power supply circuitry but the unit must always be powered from a supply fitted with an HRC type High In Rush Current fuse with a rating of 1A Warning Excessive sound pressure levels from headphones can cause hearing loss BM A2 64MADI User Manual v1 0 5 Introduction Thank you for buying this Bel Digital Group product The BM A2 54MADI MADI Audio and Status Monitor is designed to provide a unique method of reliably monitoring audio and metadata in MADI streams of up to 64 channels operating at sample rates up to 96 kHz In addition the BM A2 64MADI s comprehensive facilities enablethe conversion from a complete MADI stream to both balanced and unbalanced AES formats The BM A2 64MADI is a very high quality product engineere
31. tiched on 14 BM A2 64MADI User Manual v1 0 MADI input source selection BM A2 64MADI is able to accept two independent MADI streams one optical fibre and the other coaxial Selection of these sources is controlled from the Main Configuration Display Press the Menu encoder again to move the pointer to the input section Rotate the encoder to select between Heta iry Use the fibre SC MADI connectors Coas ir Use the coax BNC MADI connectors Once finished press the MENU encoder again and the Main Configuration Display moves to the next screen MADI input mode selection The BM A2 654MADI is capable of automatically sensing the incoming sample frequency from 44 1 kHz to 96 kHz There are also two recognised protocols used for the transmission of 88 2 kHz and 96 kHz material These are known as High Speed and the historic SMUX protocols The BM A2 64MADI is capable of working with both In automatic mode the BM A2 64MADI will detect the more recent 88 2 and 96 kHz high speed protocol If receiving the legacy SMUX protocol then rotate the encoder to select SMUX Rotate the encoder to select between Albeo Auto detect sample rates from 44 1 kHz to 96 kHz High Speed PLS Select this when receiving 88 2 kHz or 96 kHz sources using the SMUX protocol Note When in SMUX MADI mode the BM A2 64MADI can be used to convert from incoming SMUX to High Speed format at the AES outputs Once finished pres
32. up Limited Installation Hardware Considerations The BM A2 54MADI is built in a 2U 19 enclosure It is intended to be permanently installed in a standard 19 equipment rack There are ventilation grilles in the top bottom and both sides of the enclosure and care must be taken to ensure that these are not blocked by cables or other equipment when the unit is installed Do not install any other items of equipment immediately above or below to the BM A2 64MADI the use of 1U blanking panels is recommended Power Supply Considerations The BM A2 64MADI is fitted with two separate auto ranging switch mode power supplies PSUs The operating voltage range is 100 to 240 V AC 50 60 Hz The internal power rails are diode paralleled to the two supplies and the unit will operate normally if only one PSU is powered or functional For maximum protection when using both PSUs the two AC inlet cables should be connected to mains circuits which are as independent of each other as possible If redundant operation is not required only one AC supply cable need be connected either AC inlet may be used Fuses And Ratings Each of the BM A2 G4MADI s PSUs has an internal resettable fuse for PSU protection These fuses are not accessible to the user The unit should be powered from a mains supply supplies fitted with an external HRC type fuse High Inrush Current rated at 1 A Unit Connections MADI Inputs and Outputs The BM A2 64MA
Download Pdf Manuals
Related Search