User Manual - Bel Digital
Contents
1. Analogue output level The audio currently showing on the 8 bargraphs 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 level adjustment or fixed Fixed analog level Rotate encoder No mute Mute Analog mute By volume control short press ey Long press Version 2 0 Page 14 BM A1 E16SHD 2012 Dolby Information The firmware version of the Dolby decoder card and MetaData information can be accessed from this menu Dolby information short press Firmware version Dolby decoder version MetaData MetaData Rotate encoder Rotate encoder Version 2 0 Page 15 BM A1 E16SHD 2012 Installation The BM A1 E16SHD is designed to be installed in 19 bays on an equipment tray Ventilation is by natural convection Ji a S j ia AS N DIN N N Version 2 0 Page 16 BM A1 E16SHD 2012 Analogue audio inputs and outputs Version 2 0 Page 17 BM A1 E16SHD 2012 Specific2. Program mode where a selected mix of channels is available according to the encoding used An example would be 5 1 1 1 where three programs are available the 5 1 mix down and the two additional programs 1 and 1 In independent mode a 16 by 2 mixer allows any of the Dolby decoded channels to be fed to either or both audio output channels This special mix down facility allows a stereo version of a complete Dolby encoded signal to be heard for all programs This is particularly helpful with Dolby E encoded signals where up to 8 audio signals of a surround sound source can be heard using individual audio elements or a complete aural impression by summing some or all of the channels The eight audio channels are provided at the rear of the unit as four 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 2 0 Page 5 BM A1 E16SHD 2012 Main features Four pairs of unbalanced BNC digital audio AES inputs eight analogue line inputs Two auto sensing SD HD 3G inputs with loop through Two groups of four tri colour bargraphs Dolby Digital or Dolby E decoder Dolby mix down program select switch Analogue line output and 8 analogue audio outputs fou
3. 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 Select either lower or upper 8 sources using the select button Note that the mix button assignments are retained over power down Version 2 0 Page 9 BM A1 E16SHD 2012 Status display The Status display will show general status information related to the currently selected input such as the source selected and video standard where applicable Rear panel inputs The BM A1 E16SHD accepts SDI video AES and analogue audio inputs Eight differential analogue inputs are provided on a 25 way D type connector Four 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 A1 E16SHD provides both digital and analogue audio outputs on the rear panel Eight differential analogue outputs on a 25 way D type connector and four 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
4. 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 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 Level meters to 4s Rotate encoder Rotate encoder Red threshokd AES DIN Ballistics VU BBC Analog offset 18 dB or 20 dB short press gt Long prass Version 2 0 Page 12 BM A1 E16SHD 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 ER FE ee press Version 2 0 Page 13 BM A1 E16SHD 2012
5. ALO Oaa ee nido 15 Maa ON a E E E E 16 Analogue audio inputs and Utena 17 SPEC O ee aa eeee 18 Version 2 0 Page 4 BM A1 E16SHD 2012 Introduction The BM A1 E16SHD is a 1U high quality sixteen channel video audio monitor with multiple I O as standard The unit accepts audio from any one of four AES input pairs eight analogue inputs or one of two SDI inputs and produces four pairs of AES outputs and eight 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 The headphone output is taken before the limiters and mutes the speakers when used Eight 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 SDIS 625158 PCM III MONITOR Bargraph meters are arranged in two groups of eight they can display 1 to 8 or 9 to 16 using the select button under the status display Stick on graticule scales which may be applied to the spaces between the front panel bargraphs are supplied with the machine An integral Dolby decoder can accept Dolby Digital or Dolby E from any AES input pair or from any of the SDI embedded audio channel pairs Dolby E is implemented using two operational modes Independent where all eight channels are available and Dolby Mix Down or
6. BM A1 E16SHD 2012 Dieta puDIO Manual BM A1 E16SHD 16 Channel Digital Audio Monitor SDIS 6251 PCM MONITOR Version 2 0 Page 1 BM A1 E16SHD 2012 User s Guide Version 2 0 18 12 2012 Version 2 0 Page 2 BM A1 E16SHD 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 2 0 Page 3 BM A1 E16SHD 2012 Contents CONS 4 WIDE CNN OU anni aa E 5 MAINE AUN ES ee ea 6 Frontpaneltotary onto 7 LI 8 SEIECLINE SOUL LEE een een E 8 SN UE TO Ge ra anne ia 8 8004110 PRE nD ete ean RCE ane EE ERE 8 COS VF SUMO UNS a ee een 8 DECORI 8 SII MMO UES ee ee 8 Usine the DOLBY MIX Wite Ines A ee 9 TRE DOI DY TIE C Wier 9 Independent OCS an es 9 Directing sources tO Speakers uud 9 STATUE DIV REEF 10 Rear Dana I nee ee ee ee ee 10 Rear Panel OU te cca 10 Vulcani 11 UE VEE Page nennen 11 Level Meter AdjustMent 12 Line leveloutputadiust meN inensis 13 ANOLE OOP ULE V bera a illa 14 Dolby I
7. I 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 The four SDI groups will be demuxed to give 16 audio signals Dolby mode To enable the Dolby decoder select the Independent or Program position using the front panel DOLBY MIX switch The unit will decode Dolby Digital and Dolby E from the AES inputs or embedded audio carried in an SDI signal Dolby E encoding allows several separate programs or groups of audio to be carried in the same data stream The program switch is provided to allow the individual programs to be selected and their channels directed to bargraphs See the section entitled Using the DOLBY MIX switch for more information about the Dolby E monitoring features available Decoding AES inputs Rotate the CHANNEL PAIR switch to select the input carrying the Dolby encoded audio The unit will automatically detect and decode the Dolby signals and display up to 8 audio signals on the bargraphs Decoding SDI inputs Dolby E or Dolby Digital bit streams embedded in a pair of audio signals in an SDI stream can be decoded with up to eight audio signals being shown on the bargraphs The type of Dolby encoding used will be shown on the display Selecting the channel pair carrying the Dolby encoded signal is achieved using the CHANNEL PAIR rotary switch For example if the Dolby signal
8. are a copy of the signals shown on the unit s bargraphs The analogue outputs are derived from the lower 8 inputs ch1 8 They can thus be a copy of the AES inputs or two of the currently demuxed SDI groups 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 units 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 AI D 1 Ji sk gt N N i NSA Version 2 0 Page 10 BM A1 E16SHD 2012 Menu Many of the characteristics of the BM A1 E16SHD 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 7 and 8 will completely exit the m
9. ations Audio inputs Digital AES3 id 4 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 4x 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 2 0 Page 18 BM A1 E16SHD 2012 Meters 8 tri colour LED bargraphs with adjustable colour break points and ballistics DIN PPM Overall dynamic range 55 dB 5 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 1U high Outline Dimensions 483 mm W x 256 mm D x 44 3 mm H Outline Dimensions 19 inch W x 10
10. enu 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 A1 E16SHD 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 Various aspects of the Dolby operation can be accessed here Enter with Encoder short mena Quick exit Assign button 15 and 16 simultaneously Line levels short press Rotate entoder Exit with encoder long press Version 2 0 Page 11 BM A1 E16SHD 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
11. inch D x 1 75 inch H Environmental Temperature 0 C to 30 C Humidity 70 max non condensing Weight 6 kg 14lbs Version 2 0 Page 19 BM A1 E16SHD 2012 Version 2 0 Page 20
12. r pairs of AES outputs Headphone connector with speaker mute Version 2 0 Page 6 BM A1 E16SHD 2012 Front panel rotary controls Volume The volume of the speaker and headphone output can be adjusted using this control Pressing the end of the control will mute the speaker audio This can also mute the line and analogue outputs 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 control will select which pair of audio inputs is applied to the Dolby decoder Dolby Mix 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 will decode Dolby encoded information from the selected Dolby pair and produce 8 audio outputs These can then be mixed as required The positions 1 to 8 will provide a stereo mixdown of the program s encoded in the Dolby input 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 2 0 Page 7 BM A1 E16SHD 2012 Operation Selecting sources The input source select switch determines which source Analogue AES SDI 1 or SD
13. s with any phasing or special effect applied The Dolby decoder knows that the audio is encoded as 5 1 1 1 In order to listen to the engineering feeds it must be possible to direct the decoder to select the 5 1 1 or other 1 signals and output the appropriate mix down to the buss The three separately encoded audio programs can be selected using the DOLBY MIX switch Clearly the mix down of the 1 signals will be a simple mono signal When the BM AV1 E16SHD is in any of the P1 to P8 program select modes or Dolby Down Mix modes the stereo audio available on the internal buss is sent to the left and right speakers and to bargraphs 1 amp 2 Independent mode AII of the Dolby E audio signals can be decoded and made available on their own i e not mixed by setting the DOLBY MIX switch to the independent position IND In the 5 1 1 1 example music might be presented on bargraphs 1 to 6 and the two engineering feeds on bars 7 and 8 It is then easy to select which of these to listen to by pressing the button under the appropriate bargraph A mix down of some or all of the channels can be obtained by selecting several audio signals to be sent to each speaker Note Independent mix down does not apply all of the phasing effects of the Dolby mix down modes 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
14. was encoded in the second pair of audio signals in SDI Group 1 this corresponds to channels 3 4 and is selected by rotating the CHANNEL PAIR select switch to position 3 4 Version 2 0 Page 8 BM A1 E16SHD 2012 Using the DOLBY MIX switch Dolby E encoding allows several separate programs or groups of audio to be carried in the same data stream The DOLBY MIX switch allows individual mix downs and channels within a Dolby E program to be monitored Available mix downs are selected with the DOLBY MIX switch The selected signal is sent to the left and right speakers and the first two bargraphs left most looking at the front of the unit The following example may help to explain the facilities provided Consider the situation where a studio wants to convey a surround sound music signal together with two technical commentaries for transmitter operators For the surround sound component a 5 1 configuration might be ideal since it has 5 audio channels and one LF effects channel However the two independent engineering feeds two different languages and not for transmission can be encoded into two unused channels to give a configuration of 5 1 1 1 The Dolby mix down The operator at the transmitter might want to listen to the music but not necessarily in full surround sound Fortunately the Dolby decoder has an internal buss which carries a mix down This is a stereo signal that contains a mixture of in this case all 6 music signal
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