DP226 Quick Reference Accessing channels: press channel's GAIN button. First press accesses that channel's gain. To scroll through a channels parameters, use the BACK and NEXT keys. Second press accesses last viewed parameter. Third press will drop back to the default screen. Accessing menus: press the MENU key. Use the BACK and NEXT keys to select the sub-menu required, and enter using the ENTER key. This applies to all levels of menu. ENTER always confirms selections. The Menus and their Contents Input Memory Sub-menu: Used for storage and recall of input EQ, gain and delay. Also used for storage and recall of complete input memory sets using a PC card. Input Setup Sub-menu: Used for ganging input EQ and globally flattening all input EQ. X-over Sub-menu: Used for storage and recall of crossovers, including format, output EQ, output delay, output gain, and limiter settings. Also used for design of new crossovers. Security Sub-menu: Used for locking various features of the units, using a four digit code. System Sub-menu: Used to view the units status, and select various global options such as parametric EQ `Q' or bandwidth units, and output meter monitoring point (pre or post mute). Remote GPI Sub-menu: Used to configure the General Purpose Interface card (if fitted) for remote recall of memories using contact closure. Notes The crossover or output settings are stored and recalled independently (using store/recall a X-Over) from the input settings (using store/recall input memory). The output meters show level, in dB, from the limiter threshold. The input meters show level, in dB, from input clip. The high and low-pass filters are defined independently on each channel. To access the limiter attack and release parameters, select `Auto Limiter TC' No, when designing a crossover. To swap parametric filter units between bandwidth (`BW') and `Q', enter the `System sub-menu, select `Filter Q or BW', and select required readout units. Page 2 DP224/6 Operators Manual Contents DP226 Quick Reference Notes The Menus and their Contents 1 2 2 Contents Important Safety Information Thanks Unpacking the DP226 Introduction Features 3 6 7 7 8 8 Front Panel Familiarisation Rear Panel Connections Operating the DP226 Note about operation with Preliminary Set-up WindowsTM software. 10 11 12 12 12 DP226 Configurations Introduction 2 x 2 way with Mono Sum 2 x 3 way 4 way + 2 5 way + 1 6 way 13 13 13 14 15 16 17 Screen Layouts Overview Audio Function Screens Gain Screen Polarity Screen Delay Screen High and Low Pass Filter Screens Parametric Equaliser Screen Limiter Screen 18 19 19 20 21 22 23 24 DP224/6 Operators Manual Page 3 Menu Selection Input Memory Sub-menu Input Memory Recall Input Memory Store Input Memory Store to PC card Input Memory Recall from PC card Input Memory Erase 25 26 26 26 26 26 26 Input Setup Sub-menu Gang Inputs All PEQ's Flat 27 27 27 X-over Sub-Menu Load a Xover Design a Xover Store a Xover Erase a Xover Mem 28 28 28 28 28 Security Sub-Menu User Specific Xover Only Xover + Trim Xover + Trim + Mute Changes Only Changes + View Changes + Mutes EVERYTHING Entering the Password to Complete the Locking Operation 29 29 29 29 29 29 29 29 29 30 System Sub-Menu System Status LCD Contrast LED Brightness Temperature Alarm Program Update Wake-up Time Output Meters Filter Q or BW Delay Time/Distance Unit Cloning Preset Update Clip Hold Time 31 31 31 31 31 31 31 31 31 31 31 32 32 Interface Sub-Menu Interface Setup Interface Operation Single Unit System Multiple Unit System 33 33 33 33 34 AES / EBU Sub-Menu Routing Options AES Diagnostics AES / EBU Connections 35 35 35 35 Page 4 DP224/6 Operators Manual Remote GPI Sub-Menu Typical Interface Set-ups RS232 Connection (Single Unit) RS232 Connection (Multiple Units) RS485 Connection Midi Connection 36 37 37 37 38 38 Operating Notes Operating Level Grounding Crossover Filter Slopes Time Alignment Output Limiters Setting Accurate Limiter Thresholds 39 39 39 40 40 41 42 Specifications Warranty Options and Accessories Appendices Appendix 1: Limiter threshold in dB to Vrms lookup table. Appendix 2: Default X-over settings and names for all formats. Appendix 3: Equalisation Curves Appendix 4: Frequently Asked Questions Appendix 5: Additional Information: General Purpose Interface Appendix 6: DP224 Crossover Configurations 44 45 45 46 46 47 48 50 52 58 DP224/6 Operators Manual Page 5 An example of this equipment has been tested and found to comply with the following European and international Standards for Electromagnetic Compatibility and Electrical Safety: Radiated Emissions (EU): RF Immunity (EU): Electrical Safety (EU): EN55013-1 (1996) EN55103-2 (1996) RF Immunity, ESD, Burst Transient, Surge, Dips &Dwells EN60065 (1993) Important Safety Information Do not remove Covers. No user serviceable parts inside, refer servicing to qualified service personnel. This equipment must be earthed. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN DO NOT EXPOSE TO RAIN OR MOISTURE ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS ENLEVER NE PAS EXPOSER A LA PLUIE NI A L'HUMITE It should not be necessary to remove any protective earth or signal cable shield connections. Do not defeat the purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wider blade and the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. Only use this equipment with an appropriate mains cord. In the USA the cord should comply with the requirements contained in the Standard for Cord Sets and Power Supply Cords, UL 817, be marked VW-1, and have an ampacity rating not less than the marked rating of the apparatus. Page 6 DP224/6 Operators Manual Thanks Thank you for choosing the XTA DP226 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. If you would like further information about this or any other XTA product, please contact us. We look forward to hearing from you in the near future. Unpacking the DP226 After unpacking the unit, please check it carefully for any damage. If any is found, immediately notify the carrier concerned - you, the consignee, must instigate any claim. Please retain all packaging in case of future re-shipment. DP224/6 Operators Manual Page 7 Introduction The DP226 is a powerful DSP based audio processor, ideally suited for live sound applications, where it combines the functions of a multitude of conventional products in a compact 1U unit. To achieve this, the DP226 has two inputs and six outputs which can be configured in five basic crossover modes ­ 3 x 2 way; 2 x 3 way; 4 way; 5 way; and 6 way. Each input has a gain control, variable delay and eight bands of fully parametric equalisation. Each output has a gain control, variable delay, high and low pass filters, five bands of fully parametric equalisation, polarity switching and, additionally, a fully featured limiter. Remote control is catered for in the form of MIDI, RS232 and RS485 ports, and multiple user memories are provided for the storage and recall of settings.. Multipart security lock-out is available for all controls. The DP226 is also available with optional AES/EBU digital inputs and outputs. It has been designed for quick, intuitive adjustment through the use of multiple controls to provide an easy-to-use interface. Alternatively, it may be controlled externally by XTA's proprietary WindowsTM software, along with existing and future `Audiocore' products. Features Superb audio quality ­ carefully optimised double precision signal processing coupled with a 40-bit internal data path ensures a dynamic range in excess of 110dB. The high sampling rate means minimal filtering providing exceptional sonic purity. A flexible 2-input/6-output multi-mode format caters for any crossover configuration, regardless of scale. A total of 46 parametric equalisation bands are available, each providing +15 to ­30dB of gain at centre frequencies between 20Hz and 20kHz, with a wide range of `Q's available between 0.4 to 128. All parameters feature fine resolution with 1/36 octave frequency steps, 0.1dB gain increments, and 100 `Q' settings. Any parametric section can also be set to operate as a high or low shelving filter. Each output features a high performance limiter, provided with complete control over attack, release and threshold parameters. To aid set-up, the output meters show headroom to the limiter threshold, and use time constants that track those of the limiter to display precise power usage. Page 8 DP224/6 Operators Manual Each output features variable high and low pass filters, with a choice of 12, 18 or 24dB/Octave roll-off, and Butterworth, Bessel or Linkwitz-Riley responses. Independent control of each high and low pass filter allows asymmetric crossover bands to be created. Delay of up to 650mS may be independently set for each output, with an exceptionally fine minimum increment of 2.6µS. Three velocity-sensitive encoders provide a familiar and intuitive control format with all filter information displayed simultaneously on a backlit LCD screen. The comprehensive standard specification also includes 40 memories, PC Card storage and remote control via MIDI, RS232 or RS485 ports, with multipart security lock-out. AES/EBU Digital input and output interfaces are available as an option. Input and output balancing transformers are also available as an option. DP224/6 Operators Manual Page 9 Front Panel Familiarisation LCD Screen : shows menu options, channel information, and various parameters as they are adjusted. Next Key : moves forwards through the list of available parameters. Back Key : moves back through the list of available parameters. Menu Key : activates the main menu. A second press selects the last menu edited. Selection of different menus may be accomplished using the Back and Next keys, or by turning the `Freq' encoder. Enter Key : enters the chosen menu and confirms choices. Bypass Key : bypasses the currently selected parametric EQ section. Note that, for safety reasons, the high and low pass filters cannot be bypassed using this key. Quit Key : exits the menu. Encoders : three velocity sensitive controls allow the relative parameter displayed on the LCD screen to be adjusted. PC Card : PCMCIA card slot allows back-up of input memory sets, unit cloning data and facilitates the download of software updates. Gain Keys : one for each input and output, allowing instant access to the gain screen for the selected channel. The accompanying LED illuminates whilst editing is active. Input Meters : display available headroom below clipping. The yellow `0dB' LED illuminates at 3dB below the actual clipping point of the input section. The red `D.Clip' LED shows digital overflow and can therefore illuminate independently of the rest of the meter. Output Meters: display headroom below limiting. The yellow LED illuminates when the limit threshold is reached for that channel. The red LED indicates 4dB of limiting. Mute Keys: mutes the appropriate channel, and illuminates the associated LED. Page 10 DP224/6 Operators Manual Rear Panel Connections Power Switch: turns the units mains supply off and on. Mains Fuse: located in a finger-proof holder adjacent to the mains inlet. A spare fuse is also located in this holder. Mains Inlet: connected via a standard IEC socket. External: RS232 standard via a 9 pin D-type connector, for connection to a PC. Data is converted to RS485 standard and relayed to slave units via the RS485 sockets. Midi IN: 5 pin DIN socket. See page 33 for more information. RS485 In-Out: XLR sockets. Used for transmission of remote control data over long distance or multiple unit applications. See page 33 for more information. Audio In-Out: 3 pin XLR sockets are provided for each channel. All are fully balanced, pin 2 hot, 3 cold, 1 screen. Always replace the fuse with the correct type and rating as shown on the rear panel legend. DP224/6 Operators Manual Page 11 Operating the DP226 Note about operation with WindowsTM software. The following operating information covers control of the DP226 via the front panel controls only. Please consult the manual supplied with this software for information regarding computer control. Preliminary Set-up The procedure below should be followed when first installing a DP226. Design your crossover! To do this, press MENU, and use the BACK or NEXT key to select `X-over sub-menu' and then press ENTER. Use the BACK or NEXT key to select `Design a X-over' and then press ENTER. Finally, use the BACK or NEXT key to select the desired configuration an ...