Summary of DP224
Page 2
Page 2 dp224/6 operators manual 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...
Page 3
Dp224/6 operators manual page 3 contents dp226 quick reference 1 the menus and their contents 2 notes 2 contents 3 important safety information 6 thanks 7 unpacking the dp226 7 introduction 8 features 8 front panel familiarisation 10 rear panel connections 11 operating the dp226 12 note about operat...
Page 4
Page 4 dp224/6 operators manual menu selection 25 input memory sub-menu 26 input memory recall 26 input memory store 26 input memory store to pc card 26 input memory recall from pc card 26 input memory erase 26 input setup sub-menu 27 gang inputs 27 all peq’s flat 27 x-over sub-menu 28 load a xover ...
Page 5
Dp224/6 operators manual page 5 remote gpi sub-menu 36 typical interface set-ups 37 rs232 connection (single unit) 37 rs232 connection (multiple units) 37 rs485 connection 38 midi connection 38 operating notes 39 operating level 39 grounding 39 crossover filter slopes 40 time alignment 40 output lim...
Page 6
Page 6 dp224/6 operators manual 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): en55013-1 (1996) rf immunity (eu): en55103-2 (1996) rf immunity, ...
Page 7
Dp224/6 operators manual page 7 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 performanc...
Page 8
Page 8 dp224/6 operators manual 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 ca...
Page 9
Dp224/6 operators manual page 9 ♦ 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. ♦ del...
Page 10
Page 10 dp224/6 operators manual 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...
Page 11
Dp224/6 operators manual page 11 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 stan...
Page 12
Page 12 dp224/6 operators manual operating the dp226 note about operation with windows tm 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. Pre...
Page 13
Dp224/6 operators manual page 13 dp226 configurations introduction to simplify the set-up of the dp226, 5 crossover modes are selectable from the x- over sub-menu. These all have parametric equalisers, high and low pass filters, gain controls, delay and limiters. The following set of diagrams detail...
Page 14
Page 14 dp224/6 operators manual 2 x 3 way this format feeds input a to outputs 1, 2, and 3 designated low, mid, and high respectively. Input b feeds outputs 4, 5, and 6, as low, mid, and high respectively. Note that this configuration, as with the 2 x 2 way, can have the outputs ganged for stereo o...
Page 15
Dp224/6 operators manual page 15 4 way + 2 this format feeds input a to outputs 1, 2, 3, and 4 designated low, lo-mid, hi-mid and high respectively. Outputs 5 and 6 are configured as auxiliaries, with their source being either input b, or the sum or inputs a and b. The choice of pre or post input eq...
Page 16
Page 16 dp224/6 operators manual 5 way + 1 this format feeds input a to outputs 1, 2, 3, 4, and 5 designated sub, low, lo-mid, hi- mid and high respectively. Output 6 is configured as an auxiliary, with the source being either input b, or the sum or inputs a and b. The choice of pre or post input eq...
Page 17
Dp224/6 operators manual page 17 6 way this format feeds input a to all outputs designated lo-sub, through high, 1 to 6 respectively. This configuration also allows all the input eq to be moved to input a, giving 16 bands of fully parametric eq. If there does not appear to be any eq on input b, this...
Page 18
Page 18 dp224/6 operators manual screen layouts overview.
Page 19
Dp224/6 operators manual page 19 audio function screens gain screen to adjust the gain: use the ‘gain’control. Each input and output has an individual gain screen. The inputs have a range of +6db to –40db, adjustable in 0.1db steps and the outputs have a range of +15db to – 40db, againadjustable in ...
Page 20
Page 20 dp224/6 operators manual polarity screen to adjust the polarity: use the ‘gain’control to switch between + and -. Each output has an independent polarity screen. This gives the flexibility to reverse (flip by 180°) the phase of individual outputs. Note: when the outputs are ganged, the polar...
Page 21
Dp224/6 operators manual page 21 delay screen to adjust delay settings: use the ‘freq’ control for coarse control. (1ms steps) use the ‘q’ control for fine control. (2.6µs steps) each input and output has an independent delay time control. Input delay (base delay) is adjustable in 1ms steps. Output ...
Page 22
Page 22 dp224/6 operators manual high and low pass filter screens to adjust hpf/lpf settings: use the ‘freq’ control for the frequency. Use the ‘q’ control for the slope. Each output has an independent high pass filter and an independent low pass filter. Both filters have a range of selectable slope...
Page 23
Dp224/6 operators manual page 23 parametric equaliser screen to adjust parametric settings: use the ‘freq’ control for the frequency. Use the ‘q’ control for the q. Use the ‘gain’ control for the gain. Each parametric section can be positioned at a frequency from 20hz to 20khz and features a wide ra...
Page 24
Page 24 dp224/6 operators manual limiter screen to adjust limiter settings: use the ‘freq’ control to adjust the attack time. Use the ’q’ control for the release time. Use the ‘gain’ control for the limiter threshold. Each output has an independent high performance limiter. All limiters have an atta...
Page 25
Dp224/6 operators manual page 25 menu selection the following menu selections are available: input memory sub-menu: memory recall – recalls input eq, input gain, input ganging and base delay. Memory store – stores the above selection of parameters for inputs. Store to pc card – stores all the input ...
Page 26
Page 26 dp224/6 operators manual input memory sub-menu input memory recall press menu and select the ‘input memory sub-menu’ then ‘memory recall’ using the back, next and enter keys. When the menu is entered, the last recalled memory will be displayed first. Use back and next to view the other input...
Page 27
Dp224/6 operators manual page 27 input setup sub-menu there are two options in this menu, where applicable, which are: gang inputs gangs a and b inputs so that precise adjustments can be made to both inputs simultaneously. Both gain leds will light when the inputs are accessed and the lcd will show ...
Page 28
Page 28 dp224/6 operators manual x-over sub-menu load a xover loads a stored crossover from the selection available. Enter accepts the selected name and loads immediately. Design a xover opens a wizard to design a crossover. Options include format type, ganging of outputs, routing and automatic limi...
Page 29
Dp224/6 operators manual page 29 security sub-menu after selecting the ‘security sub-menu’ and pressing enter, select one of the lock types, after choosing the most appropriate one for your application. As ever, enter will confirm your selection. User specific upon pressing enter to select this type...
Page 30
Page 30 dp224/6 operators manual entering the password to complete the locking operation after selection of the lock type from the list above, a four-digit security code will be asked for. This can be entered by using the ‘freq’ control to select a character, and the ‘back’ and ‘next’keys to move to...
Page 31
Dp224/6 operators manual page 31 system sub-menu system status displays unit information including software version and temperature. Curr. Temp. = current temperature in degrees celsius. Max1. Temp. = maximum temperature this session. Max2. Temp. = maximum temperature ever reached. Lcd contrast adju...
Page 32
Page 32 dp224/6 operators manual preset update this option allows new preset crossover configurations to be uploaded into the unit via a pcmcia card. Preset configurations are accessible from memory number ten (10) and beyond, in the ‘load a xover’ menu option. They may be recalled and edited (if th...
Page 33
Dp224/6 operators manual page 33 interface sub-menu interface setup opens a wizard to configure the remote interface. Options include master/slave, master source, baud rate (rs232/485), midi relay and remote id no. Interface operation the dp226 has as standard three external interface systems midi, ...
Page 34
Page 34 dp224/6 operators manual multiple unit system for multiple unit systems one unit is set as a master, this is the unit connected to the computer and or the midi controller. This unit should be set-up as for a single unit system. The remaining units should be set as slaves and connected via rs...
Page 35
Dp224/6 operators manual page 35 aes / ebu sub-menu connection of aes/ebu signals is via the existing rear panel xlr connectors. With the aes/ebu option fitted, aes receive and diagnostic modes are provided. Routing options selects the input source – either analogue or digital, and similarly the out...
Page 36
Page 36 dp224/6 operators manual remote gpi sub-menu in certain circumstances the connection of a computer to a dp226 is both impossible and undesirable, perhaps for reasons of unnecessary complexity and cost. This is where the general purpose interface option becomes useful. It permits the recallin...
Page 37
Dp224/6 operators manual page 37 typical interface set-ups rs232 connection (single unit) a typical interface set-up might involve running an rs232 link from laptop or a desktop computer to a dp226 set up as a master unit. The diagram below shows this method of connection, the required menu options ...
Page 38
Page 38 dp224/6 operators manual rs485 connection to use rs485 communication directly from a computer, a master dp226 must be configured to receive rs485. You must have a suitable rs485 port on your computer, or a converter connected to the serial port in use. This configuration is shown below, alon...
Page 39
Dp224/6 operators manual page 39 operating notes operating level with any audio signal processing equipment it is necessary to ensure adequate signal level is used through the device, to avoid sacrificing noise performance. It is suggested that the operating level chosen should give adequate level t...
Page 40
Page 40 dp224/6 operators manual crossover filter slopes please consult the block diagrams on page 13 for details of the various configurations available. All crossover modes feature adjustable crossover frequencies with a choice of slopes, 5 bands of driver compensation e.Q. Per output and delay ti...
Page 41
Dp224/6 operators manual page 41 output limiters high performance digital limiters are provided for each output with control over attack time, release time and threshold level parameters - see page 24 for details. This level of control allows the user to balance the required subjective quality of th...
Page 42
Page 42 dp224/6 operators manual setting accurate limiter thresholds the limiters built into the dp226 are intended to be used for for loudspeaker driver protection, as opposed to amplifier protection. All modern professional power amplifiers designed for live sound use have their own limiters which...
Page 43
Dp224/6 operators manual page 43 first, check the rms power rating of the speaker system, and its impedance. Look up this value in the table above, using the closest value below the rated power of the speaker system. Note the corresponding ‘db’ value. Check the gain of your amplifier, which needs to...
Page 44
Page 44 dp224/6 operators manual specifications inputs: 2 electronically balanced impedance: > 10k ohms. Cmrr : >65db 50hz - 10khz. Outputs: 6 electronically balanced source imp: min. Load: 600ohm max. Level: +20dbm into 600 ohm frequency resp.:+½db 20hz-20khz dyn range:>110db 20hz-20k unwtd distort...
Page 45
Dp226 operators manual page 45 warranty this product is warranted against defects in components and workmanship only, for a period of one year from the date of shipment to the end user. During the warranty period, xta will, at it's discretion, either repair or replace products which prove to be defe...
Page 46
Page 46 dp226 operators manual appendices appendix 1: limiter threshold in db to vrms lookup table. Db vrms db vrms +22 9.75 +5 1.38 +21 8.69 +4 1.23 +20 7.75 +3 1.09 +19 6.90 +2 0.98 +18 6.15 +1 0.87 +17 5.48 0 0.77 +16 4.89 -1 0.69 +15 4.36 -2 0.62 +14 3.88 -3 0.55 +13 3.46 -4 0.49 +12 3.08 -5 0.4...
Page 47
Dp226 operators manual page 47 appendix 2: default x-over settings and names for all formats. X-over output 1 output 2 output 3 output 4 output 5 output 6 2x2 way+ms low high low high msub aux 120hz – 1k82hz 1k82hz – 22khz 120hz – 1k82hz 1k82hz – 22khz 24.8hz – 120hz 2 x 3 way low mid high low mid h...
Page 48
Page 48 dp226 operators manual appendix 3: equalisation curves parametric filter gain curves parametric filter ‘q’ curves parametric filter high and low shelving responses.
Page 49
Dp226 operators manual page 49 parametric filter high ‘q’ – notch filter response high pass filter response curves low pass filter response curves.
Page 50
Page 50 dp226 operators manual appendix 4: frequently asked questions how doi update mydp226 software from the net? The xta website http:wvw.Xta.Co.Uk/xta has the latest release of dp226 software posted on it along with the latest release of the audiocore control software. Download the dp226 softwar...
Page 51
Dp226 operators manual page 51 before pressing ‘enter’, check that the write-protect switch on the card is not switched on) clone data will now have been copied onto the card. Warning 1: that the write protect switch must be turned on again prior to removing the card. If it is not, possible data cor...
Page 52
Page 52 dp226 operators manual appendix 5: additional information: general purpose interface the gpi (general purpose interface) allows the recall of memories via an external switch box, alleviating the need for a computer system when only memory changes are needed. This information is reproduces in...
Page 53
Dp226 operators manual page 53 what do i need to plug in to recall a memory? On the following page there are two example circuit diagrams of gpi switches. The first is a self powered version, that is it takes its power from the unit and is therefore not fully isolated from the unit. The second diagr...
Page 54
Page 54 dp226 operators manual examples of two typical interfaces that may be used to operate the interface in ‘simple’ mode. 15 1 3 5 6 7 8 2 9 10 11 12 13 14 4 connection using crossover’s own power supply. Connect pin 5 to pin 9. Momentary action switch (mem #01) momentary action switch (mem #07)...
Page 55
Dp226 operators manual page 55 how do i configure the interface? The gpi interface sub-menu is at the end of the menu list accessed by pressing ‘menu’ and scrolling using the ‘next’ key, until the screen shows... Remote gpi sub-menu pressing ‘enter’ will access the interface sub-menu which is config...
Page 56
Page 56 dp226 operators manual how do i trigger a memory recall? As can be seen from the schematic diagrams, the ‘simple’ mode of operation just involves connecting a single pin of the socket to a positive supply, derived either from the unit (non-isolated – ground must also be connected from pin 5 ...
Page 57
Dp226 operators manual page 57 pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 pin numbering of 15-pin connector (as viewed from the rear of the unit) have i lost my rs-232 port? No. The circuitry for the rs-232 port is included on the gpi card. An adapter is included in the gpi kit which plugs into the 15-...
Page 58
Page 58 dp226 operators manual appendix 6: dp224 crossover configurations single channel 2 way with 2 auxiliaries, fed from either input b, or the sum of a & b. 2 way crossover, which may be configured to operate in stereo..
Page 59
Dp226 operators manual page 59 3 way crossover, with one auxiliary which may be fed from input b or a & b summed. 4 way crossover..