BEL BM-A1-16SHD, User Manual

Page 1: ...BM A1 16SHD 2012 Version 2 0 Page 1 Manual BM A1 16SHD 16 Channel Digital Audio Monitor ...

Page 2: ...BM A1 16SHD 2012 Version 2 0 Page 2 User s Guide Version 2 0 18 12 2012 ...

Page 3: ...heless 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 ...

Page 4: ...DI input mode 8 Dolby mode 8 Using the PROGRAM switch 8 Directing sources to speakers 8 Status display 8 Rear panel inputs 9 Rear panel outputs 9 Menu 10 Top level menu page 10 Level Meter Adjustment 11 Line level output adjustment 12 Analogue output level 13 Dolby Information 13 Installation 14 Analogue audio inputs and outputs 15 Specifications 16 ...

Page 5: ... 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 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 s...

Page 6: ...lanced BNC digital audio AES inputs four unbalanced line inputs Two auto sensing SD HD 3G inputs with loop through Two groups of four tri colour bargraphs Analogue line output and 8 analogue audio outputs eight pairs of AES outputs Headphone connector with speaker mute ...

Page 7: ...e audio output Channel Pair select This control has no function on the BM A1 16SHD 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 Other positions will have no function as they are Dolby related and will mute the audio out...

Page 8: ...ers 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 t...

Page 9: ...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 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 an...

Page 10: ...eously pressing the buttons under the bargraphs 7 and 8 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 A1 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 ...

Page 11: ...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 Analogue offset When an analogue input is selected and the bargraph ballistics are AES t...

Page 12: ...ear 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 ...

Page 13: ...justed 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 Dolby Information Not available on the...

Page 14: ...BM A1 16SHD 2012 Version 2 0 Page 14 Installation The BM A1 16SHD is designed to be installed in 19 bays on an equipment tray Ventilation is by natural convection ...

Page 15: ... 0 Page 15 Analogue audio inputs and outputs Pi n 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Description A 1 A 1 GND A 2 A 2 GND A 3 A 3 GND A 4 A 4 GND GND GND A 5 A 5 GND A 6 A 6 GND A 7 A 7 GND A 8 A 8 ...

Page 16: ...alogue 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 d...

Page 17: ... 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 inch D x 1 75 inch H Environmen...

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