XTA DC1048 Operator's Manual
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XTA DC1048 Operator's Manual

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DC1048
Operator's Manual Revision 1.10
XTA Electronics Ltd.
The Design House,
Vale Business Park,
Worcester Road,
Stourport-on-Severn,
Worcs. DY13 9BZ.
England
Tel: 01299 879977 (Intl. +44 1299 879977)
Fax: 01299 879969 (Intl. +44 1299 879969)
Web: http://www.xta.co.uk
x
ta
© XTA Electronics Ltd 2012
First published 01/2010
If you have any comments or suggestions about this manual, please
contact XTA at the address above, or email info@xta.co.uk
DC1048 Integrated Audio Management
Operator's Manual
Page 1

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  • Page 1 Fax: 01299 879969 (Intl. +44 1299 879969) Web: http://www.xta.co.uk © XTA Electronics Ltd 2012 First published 01/2010 If you have any comments or suggestions about this manual, please contact XTA at the address above, or email info@xta.co.uk DC1048 Integrated Audio Management Operator’s Manual Page 1...
  • Page 2 DC1048 Integrated Audio Management Page 2 Operator’s Manual...

  • Page 3: Table Of Contents

    Rear Panel Controls, Connections and Indicators ........15 1: Mains Power Inlet and Power Switch ...................... 15 2: RS485 Connection ............................15 3: GPI Port .................................. 15 4: Balanced Audio Outputs ..........................15 DC1048 Integrated Audio Management Operator’s Manual Page 3...
  • Page 4 Overview ............................17 Direct USB Connection ......................17 Layout of the Main Window..........................21 DC1048 “Front Panel” Controls, Readouts and Indicators ............27 Timed Presets and Preset Files ........................31 Connection of Multiple Units on an RS485 Network ........... 34 Connection via front panel USB and break-in to the RS485 Network ........

  • Page 5: Operator's Manual Dc1048 Integrated Audio Management Page

    All Pass Filter ................................53 Phase Filter ................................53 Low/High Pass Variable ‘Q’ Filter (Low Pass shown) ..............54 Elliptical filters ................................ 55 Appendix IV: Maintenance ................56 Appendix V: Specifications ................57 Index ..........................59 DC1048 Integrated Audio Management Operator’s Manual Page 5...

  • Page 6: Declaration Of Conformity

    Low Voltage Directive 2006/95/EC, in compliance with the following norm(s) or document(s): Technical Regulations: EN/IEC60065:2002 7th Edition Signed: ………………………………………………………………… Name: Alex Cooper Position: Research and Development Manager Date: January 2012 DC1048 Integrated Audio Management Page 6 Operator’s Manual...

  • Page 7: Important Safety Instructions

    10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and the point where they exit from the apparatus. 11. Only use attachments/accessories specified by the manufacturer. DC1048 Integrated Audio Management Operator’s Manual Page 7...

  • Page 8: Instructions De Securite Importantes

    L'AVANCE DE TERRE NE DEVRAIT ÊTRE de sa prise électrique et de l’endroit où il est DÉBRANCHÉE DANS AUCUNE CIRCONSTANCE. relié à l’appareil; cela est également valable pour une éventuelle rallonge électrique. DC1048 Integrated Audio Management Page 8 Operator’s Manual...

  • Page 9: Thanks

    Thanks Thank you for choosing a DC1048 for your application. Please spend a little time reading through this manual, so that you obtain the best possible performance from the unit. All XTA products are carefully designed and engineered for cutting-edge performance and world-class reliability.

  • Page 10: Introduction

    Introduction Your DC1048 is a 4 input, 8 output audio processor, offering a selection of flexible features to configure and manage an installation audio system. These include matrix mixing of all inputs to outputs, input equalisation, output equalisation, output (speaker) crossovers, delays and speaker protection (limiters).

  • Page 11: Installation

    Installation Electrical Considerations The DC1048 has been manufactured to comply with your local power supply requirements but, before connecting the unit to the supply, ensure that the voltage (printed on the rear panel) is correct, and that a mains fuse of the correct type and rating has been fitted.

  • Page 12: Operation

    If the unit is used in an extremely dusty or smoky environment, it should be cleaned of any collected debris at regular intervals. (Please also refer to the maintenance section on page 56 of this manual.) DC1048 Integrated Audio Management Page 12 Operator’s Manual...

  • Page 13: Front Panel Indicators

    By default, the LCD shows the current time and date, along with the name of the last recalled preset. Brightness of this display is automatically reduced when the unit is not being accessed after a preset time, adjustable under the “System” menu, along with the contrast. DC1048 Integrated Audio Management Operator’s Manual Page 13...

  • Page 14: 6: Usb Connector

    (having pressed a button on the left hand side of the panel) these buttons will adjust the currently selected parameter, with “OK” setting it to the displayed value and exiting the menu (after the 5 second preset delay). DC1048 Integrated Audio Management Page 14 Operator’s Manual...

  • Page 15: Rear Panel Controls, Connections And Indicators

    2: RS485 Connection To connect a network of DC1048 units, or to include this unit on a network of other devices, use this connection. The pin-out of this connector is: Pin 1: Data A (+)

  • Page 16: Menus

    Menus Overview The DC1048 has been designed to be quick to set up and simple to operate. To facilitate this, the options available for configuration on the front panel have been deliberately minimized and are explained in detail below. COMMS Menu...

  • Page 17: Remote Control And Initial Set-Up

    Remote Control and Initial Set-up Overview As the DC1048 is designed for installation applications, the control and set-up of all audio related parameters is performed under remote control using a PC or laptop running ICORE. Please ensure you have downloaded the latest release of the software from our website, xta.co.uk, and have it installed on the...
  • Page 18 PC, the COM port connection will not be available. Please confirm that the connection is made and the unit is on before continuing. DC1048 Integrated Audio Management Page 18 Operator’s Manual...
  • Page 19 “Ports” and locate the USB-Serial adapter. The COM port number it has been assigned is in brackets after the name. Make a note of this port number and then start ICORE. DC1048 Integrated Audio Management Operator’s Manual Page 19...
  • Page 20 Autoscan, or press the button on the toolbar. Assuming the ID has been set to 1 as suggested, it should be found almost immediately. You can press “Stop” once your unit is located. DC1048 Integrated Audio Management Page 20 Operator’s Manual...

  • Page 21: Layout Of The Main Window

    A double click on any device will display its “front panel” for editing of audio properties. Non-audio properties are shown in the “Properties” pane on the right hand side of the main window. Default control panel for unit, on-line with metering DC1048 Integrated Audio Management Operator’s Manual Page 21...
  • Page 22 Remember to save your system before closing ICORE to avoid having to rescan the system every time you open the software. All window positions, zones, and screen layouts (so positions of the Device View, Properties and System Monitor) are also saved. DC1048 Integrated Audio Management Page 22 Operator’s Manual...
  • Page 23 – these look like this: Drop the window on one of the anchors to dock it in the new position, as shown above. Similarly, the system monitor window can be docked either top or bottom DC1048 Integrated Audio Management Operator’s Manual Page 23...
  • Page 24 Click and drag the tab to separate the properties out from the device view again... Windows can also be left floating by dragging them from their current positions and just dropping them on the main background. DC1048 Integrated Audio Management Page 24 Operator’s Manual...
  • Page 25 Remember, if any windows have been closed they can be reinstated through the menu View Toolbars and Docking Windows. DC1048 Integrated Audio Management Operator’s Manual Page 25...
  • Page 26 Zones can be renamed by double clicking on their names. Zone can be expanded and collapsed using the in the zone header. Files will remember the zone layouts including expand/collapse status when you save them. DC1048 Integrated Audio Management Page 26 Operator’s Manual...

  • Page 27: Dc1048 "Front Panel" Controls, Readouts And Indicators

    DC1048 “Front Panel” Controls, Readouts and Indicators 1: Unit view mode buttons: switch between matrix mixer (shown here), input parametric EQ (see page 30) adjustment, and output EQ adjustment including crossover filters (see page 29). 2: Presets management pane: store, recall, rename and erase complete snapshot presets, as well as setting up automatic (off-line) timed preset recalls.
  • Page 28 21: Linkage view: Output linkage controls: link output channels so all adjustments track identically – note that changing linkage will immediately copy all parameters from the lowest channel to the others – change with caution! DC1048 Integrated Audio Management Page 28 Operator’s Manual...
  • Page 29 6: Response curve: shadow EQ: the grey response shown in addition to the blue overall curve, will change depending on the filter currently being adjusted, and shows just its contribution to the overall response. DC1048 Integrated Audio Management Operator’s Manual Page 29...
  • Page 30 2: Filter number 6 has been selected as a notch filter, and so has a fixed (very high negative) gain, but still has variable ‘Q’ (which may be increased greatly above the default value chosen for a much narrower response). DC1048 Integrated Audio Management Page 30 Operator’s Manual...

  • Page 31: Timed Presets And Preset Files

    PC. These preset files are independent of the iCore configuration file accessed through the File > Save option (an “.icd” file). The “.icd” files store all details of all DC1048 Integrated Audio Management Operator’s Manual Page 31...
  • Page 32 The “.dcp” files created when storing settings to the PC as described above only hold individual preset settings for a single preset on a DC1048. Button 3 (with the clock on it) is used to set up timed preset recalls. Pressing it will display a window as shown below: Up to ten timed events can be enabled –...
  • Page 33 Security Code: Last used code for local lock of front panel controls System Lock: Current local lock state – may be changed remotely, but see page 37 for details of how this works. DC1048 Integrated Audio Management Operator’s Manual Page 33...

  • Page 34: Connection Of Multiple Units On An Rs485 Network

    Connect to RS485 on rear panel ID Number: 4 Select next address RS Baud: 4800 – 15200k Baud rate must match on all units INPUTS OUTPUTS INTEGRATED AUDIO MANAGEMENT COMMS CLIP CLIP IC ORE S\U SYSTEM DC1048 DC1048 Integrated Audio Management Page 34 Operator’s Manual...

  • Page 35: Connection Directly To The Rs485 Network

    Phoenix instead of the USB. Also, the baud rate setting in iCore now must match that of all connected units. See page 16 for how to change this. DC1048 Integrated Audio Management Operator’s Manual Page 35...
  • Page 36 128, and the maximum theoretical cable length from the first node to the last node is 1000 metres. This distance will be affected by the cable quality and to some extent the operating environment. DC1048 Integrated Audio Management Page 36 Operator’s Manual...

  • Page 37: Security And Locking

    Security and Locking Overview The DC1048 and ICORE both have security systems that allow for local and remote security to be implemented entirely independently. Via the front panel of the unit itself, control may be restricted or entirely prevented. Through ICORE,...

  • Page 38: Security In Icore

    Next time the system goes on-line, all security settings will be sent to every unit on the network (users/passwords/permissions). This means that even if another computer is plugged into the system, the security system will remain in place. DC1048 Integrated Audio Management Page 38 Operator’s Manual...
  • Page 39 Security information is stored in the ICORE file as well as the units, so usernames and passwords will be compared in case a different secure system is opened compared to the file open on the computer when going on-line. DC1048 Integrated Audio Management Operator’s Manual Page 39...

  • Page 40: The Gpi Port

    9. Instead, an external power source provides a voltage, which is switched as necessary onto the anodes of the opto-isolators triggering memory recalls. Momentary Action Switch (Mem #01) +9volts Isolated connection. Connect external supply to between common on switches, and pin 11 ground only. DC1048 Integrated Audio Management Page 40 Operator’s Manual...

  • Page 41: Non-Isolated Connection

    GPI > Mem. Offset Mem. Offset Mem. Offset which will move the starting Mem. Offset number, so an offset of 2 will recall locations 03 – 06 and so on. DC1048 Integrated Audio Management Operator’s Manual Page 41...

  • Page 42: Complex Mode

    RF fields, or ESD strikes over 4000 volts may cause disturbance to the status LEDs on the unit. This will not affect audio performance and will be corrected on the next power up cycle. DC1048 Integrated Audio Management Page 42 Operator’s Manual...

  • Page 43: Appendix I: Updating Device Firmware

    Appendix I: Updating Device Firmware Overview The firmware that runs the DC1048 hardware and controls the remote comms may be updated using the loader engine built into ICORE. Before explaining how to update the firmware, please note that ONLY ONE DEVICE MAY BE UPDATED AT A TIME – TURN OFF ALL OTHER CONNECTED UNITS DURING THE UPDATE PROCEDURE! The other devices on the network don’t need to be physically disconnected, just...
  • Page 44 Don’t forget to set the Comms mode back to Slave Slave if the unit was Slave Slave part of a network. Repeat this procedure for all units as required. DC1048 Integrated Audio Management Page 44 Operator’s Manual...

  • Page 45: Appendix Ii: Limiter Types And Setting Thresholds

    Appendix II: Limiter Types and Setting Thresholds Program Limiter and “D-Max” Limiter The DC1048 has two levels of dynamic protection on its outputs – a traditional program limiter, and a newly introduced “D-Max” limiter. Program Limiter High performance digital limiters are provided for each output with control over attack time, release time and threshold parameters - see page 48 for details.

  • Page 46: D-Max" Clip Limiter

    This will only be true if he is not distracted – in reality, it may be several seconds before any gain reduction is imposed on the signal to bring it under control. DC1048 Integrated Audio Management Page 46 Operator’s Manual...
  • Page 47 10dB of overshoot above the threshold of the program limiter will ever be allowed. The release time may also be set to follow the High Pass filter of the output by selecting the “Auto” option on the limiters screen in ICORE. DC1048 Integrated Audio Management Operator’s Manual Page 47...
  • Page 48 Setting Accurate Limiter Thresholds The limiters in the DC1048 are intended to be used for loudspeaker driver protection, as opposed to amplifier protection. All modern professional power amplifiers designed for live sound use have their own limiters, which are tailored to protecting the amplifier from clipping.
  • Page 49 Note that, for safety, always set the limiter threshold 1 or 2 dB below the maximum allowable worked out using the above method. ALWAYS REFER TO YOUR SPEAKER MANUFACTURER FOR LIMITER SETTINGS. DC1048 Integrated Audio Management Operator’s Manual Page 49...

  • Page 50: Appendix Iii: Parametric Filter Types And Their Uses

    ‘Q’ settings (gain boosts only are shown below). Remember that ‘Q’ is 1/Bandwidth, so the higher the ‘Q’, the lower the Bandwidth, and the smaller the range of frequencies affected. DC1048 Integrated Audio Management Page 50 Operator’s Manual...

  • Page 51: Shelving Eq (High Shelf Shown)

    2kHz filter at +10dB. Varying the ‘Q’ affects the slope – values above 0.75 cause overshoot as shown. Assymetrical responses may be achieved by adjusting the ‘Q’ of each filter independantly. DC1048 Integrated Audio Management Operator’s Manual Page 51...

  • Page 52: Notch Filter

    1/Bandwidth, so the higher the ‘Q’, the lower the Bandwidth, and the smaller the range of frequencies affected. The notch filter depth varies with bandwidth – the wider the filter, the lower the depth will be. DC1048 Integrated Audio Management Page 52 Operator’s Manual...

  • Page 53: All Pass Filter

    This graph shows the phase shift relative to the input (ignoring processing delays), in 10° steps – the filter will actually provide higher resolution than this, operating in 2° steps.The filter is centred at 1kHz in this example. DC1048 Integrated Audio Management Operator’s Manual Page 53...

  • Page 54: Low/High Pass Variable 'Q' Filter (Low Pass Shown)

    ‘Q’ value will result in quite a large overshoot in level at the turnover frequency. This type of filter is often also called a resonant filter. DC1048 Integrated Audio Management Page 54 Operator’s Manual...

  • Page 55: Elliptical Filters

    Make sure you choose a high pass elliptical to work with a high pass crossover, and low pass elliptical to work with a low pass crossover. DC1048 Integrated Audio Management Operator’s Manual Page 55...

  • Page 56: Appendix Iv: Maintenance

    Do not use abrasive cleaners, as the plastic insert will scratch - marks on this section can normally be polished out with a small amount of rubbing metal polish applied with a cloth, and then buffed to a shine again. DC1048 Integrated Audio Management Page 56 Operator’s Manual...

  • Page 57: Appendix V: Specifications

    1/36 octave steps. Freq. Range LPF: 35Hz - 22kHz Due to continuing product improvement 1/36 octave steps. the above specifications are subject to Responses: change. Order 6dB/Oct. Bessel/Butterworth/Linkwitz-Riley 12- 24dB/Oct. Bessel/Butterworth 18dB/Oct. DC1048 Integrated Audio Management Operator’s Manual Page 57...
  • Page 58 DC1048 Integrated Audio Management Page 58 Operator’s Manual...

  • Page 59: Index

    Clock/calendar ......30 Auto-hiding Windows ..23 Closed contact recalls ....39 DC1048 Properties ....31 Comms Menu ......14 DC1048 Software Panel See ore Main Window ..... 19 Moving Windows ....21 Scan for units ....18 Delay Security ......36 Look Ahead ......
  • Page 60 Connections ....... 33 Maximum distance ....34 Maximum drops ....34 Vari-Q ........52 RS485 Connection ....... 32 Virtual COM Port ......17 Safety Information ....... 6 Security Wake Up Time ......31 DC1048 Integrated Audio Management Page 60 Operator’s Manual...

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