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bel Digital Audio BMA2-4SHD Operation & User’s Manual

bel Digital Audio BMA2-4SHD Manual Online:

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bel Digital Audio BMA2-4SHD User Manual
bel Digital Audio BMA2-4SHD User Guide
bel Digital Audio BMA2-4SHD Online Manual

Text of bel Digital Audio BMA2-4SHD User Guide:

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 29 Version 0.8 Error message values Value Message 1 A time out occurred after receipt of a valid start character 2 A character was detected before receipt of a start character. 3 A checksum error occurred. The erroneous value is placed in Byte 1 RS232 format 8 data bits, no parity, 2 stop bits, 9600 Baud.

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 9 Version 0.8 C C o o n n f f i i g g u u r r a a t t i i o o n n Access to BMA2-4SHD internal adjustments is obtained with the top removed. BMA2-4SHD internal adjustments The following adjustments may be made: • Monitor output level – SW3/potentiometers main board • Analog input level – SW4 and SW5/potentiometers main board • Bargraph settings – SW1 and SW2 main board, near power supply • Alarm tone – RV7 main board Warning: Configuration instructions are for trained person

  • BEL DIGITAL AUDIO BMA2-4SHD  2006 BEL (Digital Audio) Ltd C C o o n n t t e e n n t t s s INTRODUCTION 1 Main features 1 OPERATION 3 S ELECTING SOURCES 3 U SING ALARMS 3 Alarm arming 4 BARGRAPH SCALES 6 INSTALLATION 7 CONNECTOR I/O 7 Alarms connector pinout 7 RS232 Host interface connector pinout 8 CONFIGURATION 9 Adjusting analog input level

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD  2006 BEL (Digital Audio) Ltd 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 MK11RD Tel: 01908-64

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 26 Version 0.8 Video select codes Code Function 00 Not assigned 01 SDI 1 input video selected 10 SDI 2 input video selected 11 Remote position of switch Left and right speaker select codes Code Function 00 Select audio input 1 01 Select audio input 2 10 Select audio input 3 11 Select audio input 4 Color bar generator Setting this bit will replace the current SDI image with color bars. Red zone data The numerical value of the fi

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 12 Version 0.8 Adjusting alarm tone The alarm tone adjustment is located near the analogue input controls. Alarm tone adjustment Control Effect of clockwise rotation Alarm tone Decrease alarm level

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Operation  2006 BEL (Digital Audio) Ltd 3 Version 0.8 O O p p e e r r a a t t i i o o n n The front panel user interface consists of 6 rotary controls, an alarms switch and four bargraphs. There is a video selector a headphone output, two LEDs for sustained anti-phase, and seven additional status LEDS. The BMA2-4SHD front control panel Selecting sources The audio source switch selects which group of audio sources is available to the speaker selectors and bargaphs. The possible choices are Analog, AES A + B or SDI embedded groups 1 to 4 from either the S

  • BEL DIGITAL AUDIO BMA2-4SHD  2006 BEL (Digital Audio) Ltd OVERVIEW 22 Frame format 22 COMMANDS 24 DATA FORMATS 25 PROBLEM SOLVING 30 Sample problems and their solutions 31 SPECIFICATION 32

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 11 Version 0.8 Adjusting audio monitor output level In the following tables, ON is obtained with a switch lever in the DOWN position. The adjustments are located on the main board under the output sub-board. Analog monitor output adjustments – 0dB setting shown SW3 Monitor Output Setting when ON 1 Left 0 dB (0 on analog scale = 0dBu on output) 2 Left 4 dB (0 on analog scale = +4dBu on output) 3 Left 8 dB(0 on analog scale = +8dBu on output) 4 Left Variable – adjacent pot* 0 to +12 dB 5 Right 0 dB (0 on analog scale = 0dBu

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 16 Version 0.8 Inserting bargraph graticules The following bargraph scale graticules are supplied with each BMA2-4SHD: BMA2-4SHD scale graticules To apply a graticule proceed as follows: • peel back the protective backing from the chosen graticule • apply the graticule to the space between a pair of bargraphs • repeat the process for the other bargraph graticule position • ensure that the bargraph setting matches the graticule • adjust the color transitions and peak hold decay as desired

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Installation  2006 BEL (Digital Audio) Ltd 8 Version 0.8 Connector type: 9 way sub-D female Pin Description 1 Audio alarm out (TTL compatible active high) 2 Not connected 3 Reset in (TTL compatible active low) 4 GND 5 Not connected 6 Not connected 7 Not connected 8 Not connected 9 Not connected Note: TTL outputs can supply up to 10mA. RS232 Host interface connector pinout Connector type: 9 way D female Speed: 9600 bps Format: 8 bit, no parity, 2 stop bits Pin Description 1 Not connected 2 Rx (from host) 3 Tx (to host) 4 Not co

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Using MonitorMx software  2006 BEL (Digital Audio) Ltd 19 Version 0.8 Configuring alarms To enable alarms on a selected unit check the alarm categories at the left of the main screen. Toggle inverts the selection. If an alarm is generated the associated virtual LED will change from green to red and will flash if the Flashing box has been checked. If PC Sounder has been checked an audio alert will also be sent to a sound card and any connected speakers if fitted. System alarms The Systems Alarms command under the View menu will bring up the systems alarms window. The MonitorMX system alarms System alarms are alarms generate

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Introduction  2006 BEL (Digital Audio) Ltd 1 Version 0.8 I I n n t t r r o o d d u u c c t t i i o o n n The BMA2-4SHD is a professional audio monitor/ alarm system housed in a 2U rack. The unit features two speakers and an analogue line output. Audio input signals can be in the form of analog, AES (SPDIF) and SDI embedded data. The BMA2-4SHD accepts audio inputs in groups of 4 channels from the selected source and can direct any two from these to the speakers. De-embedded audio can be selected

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 13 Version 0.8 Adjusting bargraph break-points and ballistics The adjustments, SW1 and SW2 are located near the power supply. BMA2-4SHD bargraph adjustments SW1-8 AES to analog adjust OFF ON -18dBFS = 0 on analog scale -20dBFS = 0 on analog scale The –18dB and –20dB settings define the correspondence between AES input level and the 0 mark on an analog scale. This allows analog scales to be used with digi

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Operation  2006 BEL (Digital Audio) Ltd 6 Version 0.8 Bargraph scales The following bargraph ballistics may be selected using internal switches. Scale type Range Attack Fallback AES/EBU: 60dB (0 to -60dB) 1ms 1.5Sec per 20dB decay DIN PPM: 55dB (+5 to -50dB) 10mSec 1.5Sec per 20dB decay VU: 23dB (+3 to -20dB) 300mSec 300mSec BBC PPM: +12 to-12dB - mark 7 to 1 10mSec 2.85Sec - mark 7 to 1 VU EXT: 80dB (+20 to -60dB) 300mSec 300mSec NORDIC: 54dB (+12 to -42dB) 5mSec 1.7Sec per 20dB decay BMA2-4SHD scale ballistics Stick-on scale graticules, which may be applied to the space between the fron

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Installation  2006 BEL (Digital Audio) Ltd 7 Version 0.8 I I n n s s t t a a l l l l a a t t i i o o n n The BMA2-4SHD 2U may be installed in 19 inch bays with 300mm depth including typical cable and connector depth. Ventilation is by natural convection and there are vents at each side and on the top and bottom covers of the unit. Frames may be installed into bays, providing airflow through these vents is not impeded. The 2U BMA2-4SHD showing venti

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 24 Version 0.8 Commands Commands from the remote controller to BM-A series unit(s). Code(Hex) Function Reply 80 General prompt for a reply C0 - ACK (OK) C1 - NAK (send again) 81 Use first data char as a second command ACK 82 Request unit identifier C2. 83 Set up switches Data count =5 See below for format ACK 84 Set up alarm functions Data count=2 See below for format ACK 85 Request Detail C5 86 Request Switches C6 Replies Replies, when requested (e.g. 82), will consist of frames

  • BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 10 Version 0.8 Adjusting analog input level In the following tables, ON is obtained with a switch lever in the DOWN position. The adjustments are located on the main board under the output sub-board. Analog input adjustments – 0dB setting shown SW4 Anlg Input Setting whe

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 28 Version 0.8 Request Detail (0x85) This command will cause the BM-AV2 to respond with a frame containing the command 0XC5 and data describing the state of the unit and any alarms. Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Byte 0 Ms bit of Video select Video select Ms bit of Audio select Audio select Audio select Byte 1 Alarms Audio loss 4 Audio loss 3 Audio loss 2 Audio loss 1

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Using MonitorMx software  2006 BEL (Digital Audio) Ltd 20 Version 0.8 Source selection The source selection check boxes will only function if the Video Source switch on the selected unit’s front panel is in the REM (remote) position. The source selection is the same as that obtained at the front control panel with the addition of a color bar test signal. Selecting color bars does not affect the current audio source selection. Meter characteristics The meter type, peak hold time and the digital to analog reference setting are read when the software loads and can only be changed from the internal switches

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Introduction  2006 BEL (Digital Audio) Ltd 2 Version 0.8 The BEL Digital BMA2-4SHD All audio inputs are converted to 24 bit digital form and AES inputs are re-sampled using sample rate converters where necessary at an internally generated 48kHz. If embedded audio from a serial digital video input is selected, the sampling clock recovered from this is used instead. The audio source switch selects which audio source is available to the speaker selectors and bargaphs. The left and right speaker switches select which of the currently selected four audio channels is available at the spe

  • BEL DIGITAL AUDIO BMA2-4SHD Specification  2006 BEL (Digital Audio) Ltd 33 Version 0.8 Scales and Ballistics NORDIC: Overall dynamic range: 54dB (+12 to -42dB) Attack time: 5mSec Fallback: 1.7Sec per 20dB decay DIN PPM: Overall dynamic range: 55dB (+5 to -50dB) Attack time: 10mSec Fallback: 1.5Sec per 20dB decay BBC PPM: Overall dynam

  • BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 25 Version 0.8 Data formats General Prompt (0x80) This command will cause the unit to respond with an ACK or NACK reply. It can be used to poll the unit for alarms. Set up switches (0x83) This command will operate only when the video select switch on the unit front panel is in the

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 27 Version 0.8 Bar peak indicator These two bits select the peak indicator timing. Code Time 00 No peak indicator 01 3 Second hold time 10 7 Second hold time 11 Indefinite hold time AES offset This bit selects the bar graph offset when AES is input to an analog bar graph. Code Function 0 -18dB 1 -20dB Set up alarms (0x84) Bit 6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Byte 0 Reset Auto Audio Channel 4 Audio Channel 3 Audio Channel 2 Audio Channel 1 Byte 1 Toggle Disab

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD BM-A series serial protocol  2006 BEL (Digital Audio) Ltd 22 Version 0.8 B B M M - - A A s s e e r r i i e e s s s s e er i i a a l l p p r r o o t t o o c c o o l l Overview Commands to be communicated to remote BM-A series units are arranged in frames. These frames will then be sent to the remote unit, which will always reply with either ACK for acceptance or NAK for rejection. Any requested reply then follows in the same frame format. Frame format The frame starts with a start character 0xAA (alternating ones and zeros). This is followed by the destination address, the source addre

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Configuration  2006 BEL (Digital Audio) Ltd 15 Version 0.8 Choosing how many segments are colored amber from the end of ‘red zone’ sets the ‘amber zone’. Select from none to 31 using SW2-5, SW2-4, SW2-3, SW2-2 and SW2-1 as follows: SW2-5 SW2-4 SW2-3 SW2-2 SW2-1 Segment from last RED ZONE OFF OFF OFF OFF OFF None OFF OFF OFF OFF ON 1 OFF OFF OFF ON OFF 2 OFF OFF OFF ON ON 3 OFF OFF ON OFF OFF 4 OFF OFF ON OFF ON 5 OFF OFF ON ON OFF 6 OFF OFF ON ON ON 7 OFF ON OFF OFF OFF 8 OFF ON OFF OFF ON 9 OFF ON OFF ON OFF 10 OFF ON OFF

  • bel Digital Audio BMA2-4SHD, BEL DIGITAL AUDIO BMA2-4SHD Using MonitorMx software  2006 BEL (Digital Audio) Ltd 18 Version 0.8 MonitorMx software operation The MonitorMx application provides monitoring of video and audio alarm status for any local BM-A series units or multiple-unit system. MonitorMX main screen Running MonitorMx software for the first time The MonitorMx software will search automatically for BM-A series units connected to the serial ports of the PC the software is running on when the application loads. The A

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