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Page 50

  

DC1048 Integrated Audio Management

   

Operator’s Manual 

 

Appendix III:  Parametric Filter Types and Their Uses

 

A wide selection of filter types has been made available under the PEQ sectiosn 
when editing input or output filters.  Each filter type will be explained in turn in 
the following section. 

Standard Parametric EQ

 

 
The standard parametric band has adjustable frequency, ‘Q’ (or Bandwidth) and 
Gain controls. These affect a range of frequencies symmetrically about the centre 

frequency as shown in the 
graph. 

Various levels of cut/boost are 
shown to the left, along with 
various ‘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. 

 
 
 

 
 
 

Содержание DC1048

Страница 1: ...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 XTA Electronics Ltd 2012 First published 01 2010 If you have any comment...

Страница 2: ...Page 2 DC1048 Integrated Audio Management Operator s Manual...

Страница 3: ...oduction 10 Installation 11 Operation 12 Front Panel Indicators 13 1 System Menu Button 13 2 GPI Menu Button 13 3 Comms Menu Button 13 4 Input Metering 13 5 LCD Status Display 13 6 USB Connector 14 7...

Страница 4: ...rs 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 34 Connection directly to the RS485 Network...

Страница 5: ...iter and D Max Limiter 45 Program Limiter 45 D Max Clip Limiter 46 Appendix III Parametric Filter Types and Their Uses 50 Standard Parametric EQ 50 Shelving EQ High Shelf shown 51 Creating a Flat topp...

Страница 6: ...of equipment Audio processor Commodity Code 8518408990 Type Designation DC1048 is manufactured in accordance with EMC Directive 2004 108 EC in compliance with the following norm s or document s Techn...

Страница 7: ...ents accessories specified by the manufacturer 12 Use only with the cart tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving th...

Страница 8: ...une ventuelle rallonge lectrique 11 Utilisez exclusivement des accessoires et des appareils suppl mentaires recommand s par le fabricant 12 Utilisez exclusivement des chariots des diables des pr sent...

Страница 9: ...iability 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 ta x Unpacking the unit After unpacking plea...

Страница 10: ...ions for remote control are catered for through a front panel USB socket and an RS485 multi drop bus connector on the rear panel The simple user interface on the unit helps quickly set up the various...

Страница 11: ...n the unit This will not affect audio performance and will be corrected on the next power up cycle Make sure power outlets conform to the power requirements listed on the back of the unit Damage cause...

Страница 12: ...er liquids into or on the unit and do not operate the unit while standing in liquid Do not block fan intake or operate the unit in an environment that could impede the free flow of air around the unit...

Страница 13: ...6 for list of options Options are changed with the UP DOWN keys and confirmed with OK Menu exits automatically five 5 seconds after the last key is pressed 4 Input Metering The input meters read the l...

Страница 14: ...e output meters show the level relative to the limiter threshold The yellow LED on each channel illuminating when the limiter threshold is reached The red LED indicates 4dB of gain reduction on that c...

Страница 15: ...put and output connections designed for use with the WP 1048 touch remote or for connection to other third party remote control interfaces to allow for closed contact preset recall 4 Balanced Audio Ou...

Страница 16: ...8 touch panel Complx Mde Complx Mde Complx Mde Complx Mde Binary coded input for up to 16 presets Simple Mde Simple Mde Simple Mde Simple Mde One wire per preset 4 Disabled Disabled Disabled Disabled...

Страница 17: ...5 connection can be made to all units using a suitable converter These three scenarios are explored in more detail in the following pages Direct USB Connection Using a standard USB cable a serial link...

Страница 18: ...will recognize the connection of new external hardware a USB Serial device and prompt for device driver to be installed This may be obtained from our website or directly from the Internet at this addr...

Страница 19: ...the WindowsTM key on your keyboard the Pause Break key to bring up the System properties window Press BOTH keys together Alternatively you can get to the same place through start Settings Control Pan...

Страница 20: ...ection The safest method of connection to avoid accidentally changing any device settings is to select Retrieve settings from units as this will upload all device s properties and parameters to the co...

Страница 21: ...s double click on any device to open its detailed view in the main window Properties Window View and edit all non audio parameters on the selected device System Monitor Window Every unit is represente...

Страница 22: ...can automatically be opened when the software is started by setting the option in the Tools Options General tab Settings can be copied between units either using the buttons on the toolbar which uses...

Страница 23: ...ar and begin to drag For example to move the properties window and re dock it pick up the properties window by its title bar and begin to drag it This will make a number of docking option anchors appe...

Страница 24: ...re a new anchor will appear Drop on left or right of this anchor to dock properties to the left or right of the device window Drop on the centre of the anchor to dock as a pair of tabbed panes To sepa...

Страница 25: ...ndows can be set to auto hide so they disappear into the edge of the main window when not required to maximise available screen area but make them quickly available if necessary Remember if any window...

Страница 26: ...s one unit Things to know about zones There s always a master main zone which you can never get rid of New zones can be added using the Z button at the top of the rack view Devices can be moved into n...

Страница 27: ...e information on timed presets and preset files 3 Input linkage controls link input channels so all adjustments track identically note that changing linkage will immediately copy all parameters from t...

Страница 28: ...s etc Step size and units can be changed through the Properties View window 16 Output channel metering real time metering shows level relative to the limiter threshold with the yellow section illumina...

Страница 29: ...the filter will highlight on the curve and this can also be dragged to adjust the frequency Filter type is selected via the drop down list 4 Parametric filters frequency Q and filter gain can all be...

Страница 30: ...e more points worthy of note for both 1 Filter number 5 has been set to an elliptical low pass response This type of filter has no adjustment for Q or gain being a band pass filter so these parameters...

Страница 31: ...files stored on the computer NOT in the unit Press button 1 to load a preset This method effectively bypasses the unit s preset storage memory loading a preset from a PC file will transmit the settin...

Страница 32: ...hese can be either single shot events where the date and time have to be specified or repeated weekly events where the required days are specified and the time on these days Setting The Clock There is...

Страница 33: ...I triggered recalls will also be echoed onto the RS485 network to trigger other DC1048s Memory Offset Add an offset to the GPI recall location to enable recalls above 1 4 This is also added to the TX...

Страница 34: ...units INPUTS A B C D COMMS GPI SYSTEM PRESETS QUICK ACCESS OUTPUTS 1 2 3 4 5 6 7 8 ta x INTEGRATED AUDIO MANAGEMENT OK CLIP 3 6 12 24 CLIP 3 6 12 24 L 4 6 12 24 LIM DC1048 ICORE INPUTS A B C D COMMS...

Страница 35: ...cable runs reliably This device is available from us or directly from KK Systems at www kk systems com The converter comes with a 9 pin D type fitted as standard this has to be adapted to an XLR conne...

Страница 36: ...t to RS485 on rear panel Select next address Baud rate must match that at PC COMMS Menu Mode Slave ID Number 3 RS Baud 4800 15200k Connect to RS485 on rear panel Select next address Baud rate must mat...

Страница 37: ...oose the required level of lock and press OK The display will show System Menu System Menu System Menu System Menu Enter Pin 0000 Enter Pin 0000 Enter Pin 0000 Enter Pin 0000 with a cursor flashing ov...

Страница 38: ...word respectively Clicking on the Admin user will show that the permissions are all ticked and this cannot be changed To create another user level with fewer permissions press the button to the right...

Страница 39: ...curity will trigger a request for the password to be entered as used on the secure system Once entered security may then be disabled and this will be reflected on the previously secure unit so it won...

Страница 40: ...first the difference between isolated and non isolated connections Pin Number Description 1 4 Outputs Connect to WP 1048 only 5 8 Inputs 0V off 2 5V 10V max on 9 Output 5V current limited to 200mA 10...

Страница 41: ...above shows four switches connected individually to the four input lines on the GPI Simple Mode allows for the recall of four contiguous memories triggered by pressing one of the four switches These c...

Страница 42: ...ies without recourse to the memory offset feature GPI INPUT LINES MEMORY 8 7 6 5 RECALLED 0 0 0 1 01 0 0 1 0 02 0 0 1 1 03 0 1 0 0 04 1 1 0 1 14 1 1 1 0 15 1 1 1 1 16 Panel Mode Panel mode is reserved...

Страница 43: ...an determine which model it has to update and confirm the update has been a success Note that DC1048 units cannot be updated over the audio transport bridge i e via a Ti Breakout box and must be direc...

Страница 44: ...the Load button The unit will mute and the update will start DO NOT START ANY OTHER PROGRAMS DURING THE UPDATE DO NOT DISCONNECT THE BREAKOUT DURING THIS PROCEDURE During the update the LCD will show...

Страница 45: ...rectly set limiter may sound awful In particular as with all limiters using too fast an attack or release time will result in excessive low frequency distortion On the limiters screen in ICORE there i...

Страница 46: ...l of the main signal Consider the situation of a monitor engineer listening to a band perform Having no access to dynamics processors he has had to resort to manually riding the faders in an attempt t...

Страница 47: ...sulting in a zero overshoot limiter which is able to catch all peaks and provide a reliable absolute maximum setting for the output of any channel The predelayed sidechain is shown in green with the m...

Страница 48: ...ems are given a power rating in Watts RMS This is the maximum continuous power that the system will handle and often appears very conservative In reality as music program is far from continuous in nat...

Страница 49: ...17 474 34 948 68 34 50 12 38 82 188 39 376 78 753 57 33 44 67 34 60 149 64 299 29 598 58 32 39 81 30 84 118 87 237 73 475 47 31 35 48 27 48 94 42 188 84 377 68 30 31 62 24 49 75 00 150 00 300 00 Usin...

Страница 50: ...in the following section Standard Parametric EQ The standard parametric band has adjustable frequency Q or Bandwidth and Gain controls These affect a range of frequencies symmetrically about the cent...

Страница 51: ...the lower the Bandwidth and the smaller the range of frequencies affected Note that Q settings above 0 75 will result in slight overshoot in the filter response as seen at the highest setting to the r...

Страница 52: ...s affected Note that the response is fundamentally NOT a flat topped response so it is not constructed from a high pass and low pass See previous page for details of how to construct a flat topped fil...

Страница 53: ...gs the higher the Q the faster the transition Phase Filter The phase filter has adjustable frequency and phase shift controls This introduces a phase shift that gradually changes from 180 above the ce...

Страница 54: ...r so that low Q settings show less overshoot at the turnover frequency but also slower roll off Remember that Q is 1 Bandwidth so the higher the Q the lower the Bandwidth and the smaller the range of...

Страница 55: ...8dB Octave Linkwitz Riley As can be seen number 2 is significantly steeper in roll off than number 1 as would be expected However number 3 is a 12dB Octave Butterworth filter with an Elliptical Low Pa...

Страница 56: ...lets on the side panel Cleaning the casework should only be done with a cloth lightly dampened with water only The use of chemical cleaners may damage the paint finish or dissolve printing Do not use...

Страница 57: ...15dB in 0 1dB steps High and Lowpass Filters Filters 1 of each per output Freq Range HPF 10Hz 16kHz 1 36 octave steps Freq Range LPF 35Hz 22kHz 1 36 octave steps Responses 1st Order 6dB Oct Bessel Bu...

Страница 58: ...Page 58 DC1048 Integrated Audio Management Operator s Manual...

Страница 59: ...11 LCD Display 11 Output Meters 12 Preset Buttons 12 System Menu Button 11 USB Socket 12 G GPI Menu 14 GPI Port DIfference between Simple Complex 39 Isolated Connection 38 Non isolated Connection 39...

Страница 60: ...nnections 33 Maximum distance 34 Maximum drops 34 RS485 Connection 32 S Safety Information 6 Security Disable remote control 35 Hardware front panel 35 Stop memory recalls 35 Setting the clock 30 Sett...

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