BM-A2-16SHD
Contents
1. a ONE E a 12 Analogue output evel s aii cacce 13 POY MIRO ETN UNO oe acilia 13 GEE Reed IE TIE 14 Analogue audio inputs and OUtputs 15 Spello 16 Version 1 0 Page 3 BM A2 16SHD 2012 Introduction The BM A2 16SHD is a 2U high quality sixteen channel audio monitor with multiple I O as standard The unit accepts audio from any one of eight AES input pairs ten analogue inputs or one of two SDI inputs and produces eight pairs of AES outputs and ten analogue outputs The SDI inputs automatically detect SD or HD or 3G video and de multiplex all 16 audio channels An active loop through output is available for the SDI inputs 9 A2 SERIES E16SHD PCM Ls J oo A L soki DE DOLBY mm ae 4 sola E ATEEN s qg E OO Dolby E DIGITAL rit E VOLUME CHANNEL PAIR NAV E E 8 a 7 La 9 D O 2 1 2 3 4 5 6 7 8 4 6 A3 2 10 1 12 13 14 15 16 LR LAR URL4R MIN Ml Te L URR LURL R PUSHTO MUTE PUSH FOR MENU The audio video status display provides the status of the selected audio The headphone output is taken before the limiters and mutes the speakers when used Sixteen high resolution tri colour bargraphs are provided with user selectable ballistics and colour break points Up to sixteen PCM audio inputs can be selected individually or mixed and directed to each speaker Bargraph meters are arranged in two groups of eight the left2. Menu Volume The volume of the speaker and headphone output can be adjusted using this control It can also be set to adjust analogue and line output level from the menu Pressing the end of the control will mute the speaker audio This can also mute the line and analogue outputs as selected in the menu Balance This control will differentially adjust the level of the speaker and headphone output Pressing the end of this control will centre the audio output Channel pair select This is a Dolby control and does not function on this model Dolby Mix control This control will set the way in which the monitor will treat the incoming audio The PCM position will treat the current audio input as straight PCM encoding and reproduce it unprocessed on the 16 available channels The IND position applies to Dolby decoding which is not a feature of this product The positions 1 to 8 apply to Dolby decoding which is not a feature of this product Menu Pressing the end of this control will enter the menu mode described in the Menu section Input select Rotating this control will select one of the four audio input sources Analogue AES SDI1 or SDI2 Version 1 0 Page 6 BM A2 16SHD 2012 Status display LOCK 501 The Status display will show general status information related to the currently selected input such as the source selected and video standard where applicable Version 1 0 Page 7 BM A2 16SHD 2012 Operation
3. Enter with Encoder short press Quick exit Assign button 15 and 16 simultaneously Level meters Line levels short press Rotate encoder Analog levels metadata Exit with encoder long press Version 1 0 Page 10 BM A2 16SHD 2012 Level Meter Adjustment Various aspects of the audio level indication can be adjusted here 1 Amber threshold The point at which the bargraph changes from green to amber can be adjusted here Bargraph 16 is forced to full scale to allow easy control of the colour transitions 2 Red threshold The point at which the bargraph changes from amber to red can be adjusted here Bargraph 16 is forced to full scale to allow easy control of the colour transitions 3 Ballistics The scales and dynamics of the bargraphs can be selected here The options are AES DIN VU and BBC The appropriate scales should be affixed to the front panel 4 Loudness Loudness metering will be activated here in a subsequent revision of firmware 5 Analogue offset When an analogue input is selected and the bargraph ballistics are AES the way in which this is displayed is adjusted here If 0 dB analogue is applied to the unit the bargraph can be configured to show either 18 dB or 20 dB MONITORA mber threshold Rotate encoder Amber threshold Rotate encoder Red threshold AES Ballistics i BBC Loudness Analog offset 18 dB or 20 dB short press Long press Version
4. Selecting sources The input source select switch determines which source Analogue AES SDI 1 or SDI 2 is available to the speaker selectors and bargraphs AES inputs can be at 44 1 kHz or 48 kHz sampling rate SDI input mode The unit automatically detects SD HD or 3G video and provides the video mode on the Status display The four SDI groups will be demuxed to give 16 audio signals Mode select As Dolby decoding is not implemented on the BM A2 16SHD ensure that the mode select is always set to PCM All other modes are not active Channel Pair As Dolby decoding is not implemented on the BM A2 16SHD this control is not active Directing sources to speakers Where more than two audio signals are present it may be useful to direct and combine sources to selected speakers The left speaker is indicated by a red LED and the right by a green LED on the top of the bargraphs To direct a particular source to the left or right speakers proceed as follows Repeatedly press the button under the bargraph corresponding to the input audio signal required until the top LEDs of the bargraph shows red for the left speaker green for the right or both to direct the audio to both speakers Each speaker can receive a mix of audio from inputs 1 to 16 Note that the mix button assignments are retained over power down Version 1 0 Page 8 BM A2 16SHD 2012 Rear panel inputs The BM A2 16SHD accepts SDI video AES and analogue audio inputs
5. hand group handles inputs 1 to 8 and the right hand group handles inputs 9 to 16 Stick on graticule scales which may be applied to the spaces between the front panel bargraphs are supplied with the machine The sixteen audio channels are provided at the rear of the unit as eight pairs of AES signals on BNC connectors and four pairs of differential analogue signals The analogue outputs and line outputs can be at a fixed level or slaved to the front panel volume control The analogue and two line outputs can be muted independently from the menu or under the control of the front panel mute switch Version 1 0 Page 4 BM A2 16SHD 2012 Main features Eight pairs of unbalanced BNC digital audio AES inputs Two auto sensing SD HD 3G inputs with loop through Custom channel mix downs for de embedded audio channels Two groups of eight tri colour bargraphs with selectable meter types ballistics colour transition points Analogue line output and 8 analogue audio outputs eight pairs of AES outputs Audio Video status display Headphone connector with speaker mute Ability to upgrade device in the field to provide Dolby decoding functionality Version 1 0 Page 5 BM A2 16SHD 2012 Front panel controls MONITORA LOCK AES i 2 3 5 6 7 8 BALANCE PROGRAM 2 3 DOLBY MIX 1 VA 4 Balance ge PCM DI 5 g E Input select IND S6 A 2 R R 5 PUSH TO CENTRE VOLUME CHANNEL PAIR 8 ee Volume 7 amp 2 6 3 ci
6. 1 0 Page 11 BM A2 16SHD 2012 Line level output adjustment The audio currently selected for the two front panel speakers is also available on two XLR connectors on the rear panel The level of these can be adjusted from this menu 1 Line level The line output level can be fixed or controlled by the front panel volume control and this can be selected here 2 Fixed line level When fixed output level is selected its level can be adjusted here 3 Line mute The line outputs can be muted here or the mute can be slaved to the front panel volume control Line levels Rotate encoder by Volume control Line level adjustment Rotate encoder Fixed line level No mute Line mute Mute By volume control short i AT vKKx b IGG press Version 1 0 Page 12 BM A2 16SHD 2012 Analogue output level The audio currently showing on the lower 8 bar graphs are directed to 8 analogue outputs on a 25 way D connector on the rear panel The level of these can be adjusted here 1 Analogue level control The analogue output level can be fixed or controlled by the front panel volume control from here 2 Fixed analogue output level When fixed analogue output level is selected its level can be adjusted here 3 Analogue output mute The analogue outputs can be muted here or the mute can be slaved to the front panel volume control Analog levels Rotate encoder by Volume control Analog le
7. BM A2 16SHD 2012 leita puDIO BM A2 16SHD 16 Channel Digital Audio Monitor DO porey SO me el ie DI Dolby E DIGITA a nav 7 e iI 3 7 7 y amp 2 2 LA DI lt EN A A 3 10 TARATI Bi AT ns nR mn Max T i ua URR PUSUTO MUTE s User s Guide Version 1 0 01 01 2012 Version 1 0 Page 1 BM A2 16SHD 2012 BEL Digital Audio Ltd has made every effort to ensure the accuracy of information contained within this document which is nevertheless supplied for information purposes only and does not constitute any form of warranty or guarantee All trademarks acknowledged The information in this document is subject to change without notice Bel Digital Audio Ltd Unit 3 Horwood Court Bletchley Milton Keynes Bucks MK1 1RD United Kingdom Tel 44 0 1908 641063 Email info beldigital com Web www beldigital com Version 1 0 Page 2 BM A2 16SHD 2012 Contents Cone 3 Mro dU Onee E ai E 4 MING T E A 5 FFONEPAnel OM 6 Ada anno 7 OPE aaa 8 SCIECHINES0OUFCe sr nanne ia 8 SDINpuEncod ea 8 VEC e RR E AA 8 PROGRANE SWITCH acne aaa atte Error Bookmark not defined Directing sources CO SDEAKEMS scinicssvecansdcracerisvsicaszsdesataansedadealasenadesseiandd de nseandvasieesaevbiadelsteisostssedaneenteets 8 Reir eM SUA ROU ea veesuriccaeencun AE AE AE E E AA 9 Rear panerou onrera E RA 9 VE RR EIA 10 TOP Ilevel Men polare 10 Line level output adjUstment
8. Eight differential analogue inputs are provided on a 25 way D type connector Inputs 1 and 2 are duplicated on XLR connectors and sum with the corresponding inputs from the D type connector Eight pairs of AES unbalanced inputs are available on BNC connectors Two SD HD 3G auto select SDI inputs are provided Rear panel outputs The BM A2 16SHD provides both digital and analogue audio outputs on the rear panel Eight differential analogue outputs on a 25 way D type connector and eight pairs of AES3 on BNC connectors are available The audio carried on the AES outputs are derived from the currently selected input source analogue AES or SDI In effect these audio outputs are a copy of the signals shown on the unit s bargraphs The analogue outputs are derived from the lower 8 inputs They can thus be a copy of the AES inputs two of the currently demuxed SDI groups or the eight decoded Dolby signals Two line outputs are provided which carry the same audio as the speakers The levels of the analogue and line outputs are adjustable in the menu It is possible to mute the output from the unit s speakers by pressing the end of the VOLUME control It is also possible to independently mute the analogue outputs and the line outputs using the volume control An SDI loop through is available which carries a reconstituted SDI signal from the currently selected SDI input x pa wo AN Version 1 0 Pag
9. e 9 BM A2 16SHD 2012 Menu Many of the characteristics of the BM A2 16SHD can be adjusted in the menu When the menu is activated by pressing the NAV rotary encoder the top level of the menu will appear The items in this level can be selected by rotating the encoder and then pressing it for approximately 0 5 seconds The second level will then appear and the required item selected by rotating the encoder and then pressing it At this point in the menu the value of the current parameter can be adjusted To go back one step in the menu press and hold the encoder for longer than 1 second Tip Simultaneously pressing the buttons under the bargraphs 15 and 16 will completely exit the menu The characteristics that can be adjusted in the menu are shown below Top level menu page The top level of the menu carries the main areas of operation of the BM A2 16SHD that can be adjusted 1 Level meters This section allows access to the bargraph colour break points and ballistics 2 Line levels The line output level control can be selected here either fixed level or controlled by the volume control The line output can also be muted or slaved to the main speaker mute control 3 Analogue levels The analogue output level control can be selected here either fixed level or controlled by the volume control The analogue output can also be muted or slaved to the main speaker mute control 4 Dolby Is not implemented in this model
10. to 50 dB Attack time 10 mSec Fallback 1 5 Sec per 20 dB decay BBC PPM Overall dynamic range 12 to 12 dB from mark 7 to mark 1 Attack time 10 mSec Fallback 2 85 Sec from mark 7 to mark 1 VU Overall dynamic range 23 dB 3 to 20 dB Attack time 300 mSec Fallback 300 mSec AES EBU Overall dynamic range 60 dB 0 to 60 dB Attack time 1 mSec Fallback 1 5 Sec per 20 dB decay Dimensions 19 Rack Mount 2U high Outline Dimensions 483 mm W x 256 mm D x 89 mm H Outline Dimensions 19 inch W x 10 inch D x 3 5 inch H Environmental Temperature 0 C to 30 C Humidity 70 max non condensing Weight 6 kg 14lbs Version 1 0 Page 17 BM A2 16SHD 2012 Version 1 0 Page 18
11. vel adjustment or fixed Fixed analog level Rotate encoder No mute Mute Analog mute By volume control short press e Long press Dolby Information Is not implemented in this model Version 1 0 Page 13 BM A2 16SHD 2012 Installation The BM A2 16SHD is designed to be installed in 19 inch bays on an equipment tray Ventilation is by natural convection O Q Version 1 0 Page 14 BM A2 16SHD 2012 Analogue audio inputs and outputs Version 1 0 Page 15 BM A2 16SHD 2012 Specifications Audio inputs Digital AES3 id 8 x 75 ohm BNC connector Sample rate 44 1 48 kHz Analogue 8 differential 25 way D connector Clipping 15 dB Audio outputs Digital AES3 id 8 x 75 ohm BNC connector sample rate 48 kHz Analogue 8 differential audio channels level adjustable 25 way D connector Line output Copy of speaker outputs level adjustable on 2 x XLR3M connectors Analogue noise Noise THD 108 dB w r t clipping Analogue frequency response 20 Hz to 20 kHz 1dB Video inputs Video format SDI SD HD or 3G Video output 1 SDI active loop through BNC connector Main drive amp Noise THD 80dB w r t maximum output Speaker driver units Peak acoustic level 2ft 100 dB SPL Shielding Magnetic Version 1 0 Page 16 BM A2 16SHD 2012 Meters 16 tri colour LED bargraphs with adjustable colour break points and ballistics DIN PPM Overall dynamic range 55 dB 5
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BM A2 16SHD