DFP-225 User Manual
Contents
1. Auto Notch x page from this screen it is possible to SEE what is the Automatic Setting that the DFP225 chosen for the Automatic Notch number X on the base of the Automatic Notch placement following the DFP225 detection of occurring feedback Actually the Auto Notch Pages can be used to check what have been the detected frequencies and therefore the placed notches which activity is shown on the DFP225 front panel s notches led bars Aut Bw 1 20 No editing of the Automatic Notches is allowed on this pages The number of Automatic Notches is depending from the selection operated within the Utility Menu accessible through the Util Byp buttons located at the bottom of the LOUT ROUT led bars Manual Notch x page from this screen it is possible to edit the all parameters of the Manual Notch Filters not used by the Automatic Notch setting process of the DFP225 The number of Manual Notches is depending from the selection operated within the Utility Menu accessible through the Util Byp buttons located at the bottom of the LOUT ROUT led bars Up to 24 Manual filter are available there where at least one Automatic Notch is left for the DFP225 Automatic Notch placement process Once in the Man Notch Filter s edit screen all the filter s parameters can be modified using the NAV PAR1 PM2 and encoders for editing the Filter s Center Frequency Bandwidth BW and Attenuation From the above screen after p2. No Frequency Shift and 100 1 13 Band Shift So i e a 1000kHz signal at Speed 100 will be shifted down of the 1 13 which is 1000 1000 0 013 988 7Hz Bypass Notch page from this page it is possible to Make Active or not Active Bypass the all Manual Notch Filters set by the User Once set by the user the Manual notch filters the ones having the attenuation value different from 0dB are active filters modify the original band harmonic content and their active condition is shown by the related led on the Notches Led Bar on the front panel When the Bypass Notch parameter within the Bypass notch page is set to On the all Manual Active notch filters will be made NOT ACTIVE still being their parameters untouched and the Led on the front panel s 25 Notches led bar left On This feature is allowing the User to temporary bypass the Manual notches without the necessity to Clear them The Temporary Bypass of the Manual Notches can be set On Off using the PM2 OR PM3 encoder Sensitivity page the DFP225 Feedback Detection Elimination Algorithm so the one based on the feedback detection through a band scanning and Feedback Potential Occurrence Analysis is using in its evaluation of the potential feedback occurrence a parameter called SENSITIVITY This parameter is used by the algorithm for understanding if to be more or less sensitive to differences in energy detected between neighbor sub bands of the over
3. recalled for the DFP225 filters setting By pressing ENTER and rotating the PM2 or PM3 encoders it is possible to scroll through all current available factory and user presets If NO USER PRESETS are stored yet the screen will show Only the factory presets If presets have previously been stored by the user anyone of them can be recalled starting from the location 09 10 By using the PM2 or PM3 encoder it is possible to scroll through the stored presets Once the desired preset appears on the screen select it by pressing the ENTER button and this will force the DFP225 to begin to load this selected preset and the following transitory screen will appear Once loaded the DFP225 will exit to the Recall a Program screen automatically and the above screen will disappear Note at any time it is possible to quit the recalling action by pressing the ESC button Save a Program this page allows you to store a new preset in the DFP225 s memory By pressing the ENTER button and rotating the PM2 or PM3 encoder it is possible to scroll through the previously saved presets and the available empty locations identified by Empty Memory If no user presets are stored the Save a Program screen will show empty memory locations for all 09 32 presets as shown in the example below for location 10 Save a Program Empty Memory When storing an edited configuration for the DFP225 s
4. this sub menu allows you to define the remote control interface USB or RS485 to be used for controlling the DFP225 13 From Interface Utilities press ENTER to access the Interface Setup Interface Setup this screen allows you to choose the remote control protocol for the DFP225 Interface Setup du 1 NTERFACE UTILI i By pressing ENTER and then using the PM2 or PM3 encoders you can choose between the two possible interfaces USB or RS485 for the DFP225 Pressing ENTER on a selected source will make an asterisk appear to the right of the description on the LCD as in the following example which shows the selected interface as USB 14 Security Sub menu this sub menu allows the User to set the parameters shown lock the DFP225 and set a Password therefore limiting the unit s functions and controls to those who have only access to the appropriate Password Press ENTER and then use the NAV PAR1 to scroll between options Show Parameter Pressing ENTER from the above menu will access the Show Parameter Sub Menu Press ENTER again and use the PM2 or PM3 encoders to scroll between the be shown and not be shown options An asterisk will highlight which option is selected Choosing the be shown option means that once the unit is locked you cannot access parameter editing features but they will be displayed on the LCD screen Choosing the not be shown option mea
5. 08 09 User Preset 01 32 User Preset 24 ESC 2 2 PROGRAM UTILITY Save Program M lt lt Save Program gt gt ENTER pas Maer Preset 01 32 User Preset 24 ESC 2 3 PROGRAM UTILITY te Delete a Program lt lt Delete a Program gt gt los 09 User Preset 01 ENTER i 32 PUser Preset 24 3 UTILITY MENU lt lt Interface Utilities gt gt ENTER ESC 3 1 INTERFACE UTILITY ESC Interface Setup Interface Setup Source USB ENTER Source RS485 4 UTILITY MENU lt lt Security Utilities gt gt enter ESC 4 1 SECURITY UTILITY ESC Parameter will Show Parameter be shown m 0 not be shown ENTER 4 2 SECURITY UTILITY a Lock Unit Lock Unit Lock Off ENTER Lock On 4 3 SECURITY UTILITY ESS User Password User Password 1 ENTER 4 4 SECURITY UTILITY a Enable Password For the details about the Password Setting Enable Enable Password as Password Enable and Unit Lock refer to the Utility Menus Use ENTER Password Disable Section MENU Channel LIN RIN Input Channels Editing Access by pushing the EDIT MUTE buttons NAV PAR1 Encoder to navigate between menus 1 Ch 1 2 Left Right Name Name Name enter ESC gt Name _ 2 Ch 1 2 Left Right Source Source Analog InA ENTER ESC gt Source Analog InA 3 Ch 1 2 Left Right Gain Gain 0 0 dB enter ESC gt Gain 0 0 dB 4 Ch 1 2 Left
6. Detection Elimination Automatic Process NOTCHES 1 5 15 20 25 LEFT When a Manual or Automatic notch number x is used or placed by eh DFP225 the related led on the Notches bar will turn ON when an Automatic notch is released cleared in Var mode the related led will turn Off again making clear to the user the still available notches number Factory Reset In the event of the password being lost or any other reason the user may require the unit to be reset to the original factory settings a Factory Reset that will clear all settings of the DFP225 and return the device to the original factory setting is available to the user Note Continuing with this process will mean the DFP225 will re initialize to the original factory settings and any previously stored information and changed parameters will be permanently lost Use the following procedure to perform the factory reset 1 While the DFP225 is switched OFF simultaneously press the ENTER ESC UTILITY buttons on the front panel 2 Maintain pressure on all three buttons as you turn the power switch to On and the following LCD screen appears on the DFP225 3 Release the buttons and wait for the DFP225 to re initialize Once completed the DFP225 will resume regular operation as though it was a new unit from the factory and no previously programmed parameters will be available for use GND LIFT switch
7. Right Polarity Polarity Normal ENTER ESC gt Polarity Normal 5 Ch 1 2 Left Right Delay Delay 0 000 ms enter ESC gt Delay 0 000 ms 6 Ch 1 2 Left Right Limiter A 5ms R 0 2s 20dB ENTER ESC gt A 5ms R 0 2s 20dB N Ch 1 2 Left Right Volume Volume 0 0 dB enter ESC gt Volume 0 0 dB 8 Ch 1 2 Left Right Aut Notch 01 25 1000kHz BW 1 20 OdB enter ESC Automatic notch filter 9 Ch 1 2 Left Right Man Notch 01 25 1000kHz BW 1 20 0dB enter ESC gt Freq 1000Hz ENTER ESC gt Bw 1 20 A OdB NAV PAR1 Enc PM2 Enc PM3 Enc to chose values for the parameters no need to confirm the chosen values which are automatically loaded during the encoders use For Editing the Device s Name refer to the Details on the Utility Menus Use Section PAR1 N A Analog InA Same as PAR2 Analog InB Analog InA InB Digital Left Analog Right Analog L R PAR1 N A 12 db Same as PAR2 6 dB PAR1 N A Normal Same as PAR2 Invert PAR1 N A 000 0000ms 000 0000ms 1 ms steps 20 8 us steps 848 0000ms 000 9984mS Atk time 5ms Rel time 0 1s Amp 10 0 dB 200ms 3 0s 20 0dB OFF PAR1 N A 12 db Same as PAR2 6 dB The number of Automatic Notch Filters is depending from the setting within the Utility Menu accessible through the UTIL BYP buttons at the bottom of the LOUT ROUT led bars When a Notch Filter is an Automatic one it
8. below are the functions of the front panel control buttons and encoders for the DFP225 Getting Started As soon as the DFP225 is turned ON the device model name will appear in the LCD screen DFP225AVB dback Fina B and a status bar will show the progress of the DFP225 initialization process The DFP225 has eight factory pre set Default Flat 01 up to Default Flat 08 After the initialization the DFP225 will show on the LCD the first of the embedded preset or the last one selected prior to the unit being turned off First time activation will default to the first of the preset DFP225AVB Default Flat01 Encoders and ENTER ESC buttons The DFP225 is equipped with 3 Relative Encoders NAV PAR1 PM2 These encoders allow you to navigate the user interface and edit sections of the processor They allow the user to navigate within the screen for the selection of sub menus pages and parameters and to select the values to be assigned during the editing operations The ENTER and ESC buttons allow the user to confirm or NOT confirm the operations performed by the encoders e UTILITY EDIT MUTE and UTIL BYP buttons The UTILITY button allows the User to enter the Sub menus and set the general characteristics of the Feedback Eliminator The EDIT MUTE buttons allow the User to enter the Editing Menus of the Feedback Eliminator s Input Channels or to MUTE the Feedback Eliminator
9. by Password the keylock icon will appear on the default LCD screen and no menu pages will be accessible with the exception of the User Password option To regain access to the full operation of the DFP225 ENTER to the User Password screen and press the UTILITY Button to access the following screen to enable the correct password to be entered User Password 1 After the correct password has been entered you will be able to access the full functionality of the DFP225 the lock Icon will disappear from the Default Screen and automatically the Enable Password page will be back to the Disable condition If no Password has been set within the DFP225 as described in the previous paragraphs the DFP225 will not allow you to enable any Password and the choice in the Enable Password will be limited to only the Disable option 17 Menu EDIT MUTE Feedback Eliminator s Channels Editing access by pushing the EDIT MUTE buttons From the Default Screen it is possible to access the EDIT MUTE editing menu by pushing the LIN or RIN button Once the button is pressed the related blue EDIT MUTE LED will turn ON The Sub Menu pages can now be scrolled through by rotating clockwise and counter clockwise the NAV PAR1 encoder For parameter editing it is necessary to press ENTER and an arrow will appear on the left of the screen gt Then use the PM2 and encoders fo
10. one leading to use Bw as 1 10 or 1 20 The Bandwidth of the Automatic Notches can be set using the PM2 OR PM3 encoder and can assume 4 different values which are 1 5 of Octave 0 2 1 10 of Octave 0 1 1 20 of Octave 0 05 1 70 of Octave 0 014 Automatic Reset of Auto Notch page from this page it is possible to set the WAY of the Automatically placed notches Once a feedback Is detected and the Automatic Detection Elimination algorithm places accordingly the notch filters the placed filters can REMAIN there were placed even the feedback has been eliminated or they can be REMOVED after the feedback is no longer there The user depending from the specific use of the DFP225 can decide if after the detection and elimination of the feedback due to the notch placement to leave the filters in place or remove them after a while If the user want the placed filters to REMAIN in place ALSO If THE DETECTION ELIMINATION process is stopped see bypass button use then the FIX Fixed setting has to be selected This is useful when the Feedbacks are occurring mainly because of the Environment structural problem as its shape and geometry favoring the rise up of the feedback ever at the same frequencies If the user want the placed filters to be removed after a while then the VAR Variable setting has to be selected This is useful when the Feedbacks are occurring mainly because of occasional events and not from Environmental
11. page where the Gain of the Feedback Eliminator s Channel 1 named Left is set to 0 0dB 19 Polarity page from this page it is possible to set the Feedback Eliminator s Channel Polarity by using the PM1 or PM2 encoders The polarity can be Normal or Inverted which means rotated of 180 Degrees The following is an example of a Polarity screen where the Polarity of the Feedback Eliminator s Channel 4 named Left is set to Normal Delay page from this page it is possible to set the Feedback Eliminator s Channels Delay Time from 000 0000mS up to 848 9984mS by steps of 1mS 20 8uS To set the Delay time press ENTER an arrow will appear on the left of the screen gt then use the PM2 encoder to set the Delay Time in steps of 1mS and the PM3 for setting the fine Delay Time in steps of 20 8 microseconds The following is an example screen for the Delay page where the Delay Time of Feedback Eliminator s Channel 1 named Left is set to 160 1872mS Limiter sub menu from this page it is possible to set the Feedback Eliminator s Channels Limiter The following is an example screen for the Limiter page where the Attack Time of the Limiter is set at 5ms the Release Time is set at 0 2Sec and the Limiter Active Threshold is set at 5dB Once pushing ENTER the Limiter s parameters can be modified using the NAV PAR1 PM2 and PM3 encoders for
12. 2 N A PAR3 N A Enter to confirm if pressed ENTER the all Automatic Notches are reset 6 Ch 1 2 Left Right Flat M notch Flat manual notch ENTER ESC Flat manual notch PAR1 N A PAR2 N A PAR3 N A Enter to confirm if pressed ENTER the all Manual Notches are reset 7 Ch 1 2 Left Right Speed Freq Speed Freq 25 enter ESC gt Speed Freq 25 PAR1 N A 0 Same as PAR2 100 8 Ch 1 2 Left Right Bypass notch Bypass notch Off ENTER ESC gt Bypass notch Off PAR1 N A On Same as PAR2 Off 7 Ch 1 2 Left Right Sensitivity Sensi ity 75 ENTER ESC gt Sensitivity 75 PAR1 N A 0 Same as PAR2 100 NOTE TO ACTIVATE THE FEEDBACK DETECTION ELIMINATION PROCESS FOR EACH CHANNEL INDEPENDENTLY ONCE SET PROPERLY THE ALL PARAMETERS HAS TO BE USED THE UTIL BYPASS BUTTONS AT THE BOTTOM OF THE LOUT ROUT LED BARS WHEN PRESSED THE UTIL BYPASS BUTTONS FOR AT LEAST 2 SECONDS THE RELATED LED ON TOP OF THE BUTTONS WILL TURN RED AND THE FEEDBACK DETECTION ELIMINATION PROCESS IS ACTIVE WHEN THE RELATED LED ON TOP OF THE BUTTON IS OFF OR JUST BLUE FOR EDITING PURPOSES THE FEEDBACK DETECTION ELIMINATION PROCESS IS IN BYPASS MODE NOT ACTIVE Menu UTILITY access by pushing the UTILITY button From the Default Screen it is possible access the UTILITY menu pushing the UTILITY button and the Sub Menus pages can be selected just rotating clockwise and counter clo
13. Default Flat 01 From this point sub menus are accessed using the UTILITY UTIL BYP LCOMP RCOMP ENTER and ESC buttons and all parameters and values are navigated by the NAV PAR1 PM2 and PM3 encoders Please refer to the following menu structures MENU UTILITY MENU Access by pushing the UTILITY button NAV PAR1 Encoder PM2 or PM3 Encoder to navigate between menus to chose option then ENTER to load it indicates the selected option 1 UTILITY MENU lt lt System Utilities gt gt ENTER ESC 1 1 SYSTEM UTILITY ESC System Setup lt lt System Setup gt gt Setup Notch Freq Setup Freq Shift ENTER Setup Fsh NFrq ESC 1 2 SYSTEM UTILITY q _ Power On Procedure lt lt Power On Procedure gt gt an Fade In On ENTER Fade In Off ESC 1 3 SYSTEM UTILITY D Delay Units lt lt Delay Units gt gt Unit Time ms ENTER Unit Distance m ESC 1 4 SYSTEM UTILITY Ramps on changes lt lt Ramps on changes gt gt s Ramps Off ENTER Ramps On ESC 1 5 SYSTEM UTILITY Software Version lt lt Software Version gt gt Version V1 00 ENTER gt gt 2 1 PROGRAM UTILITY ESC Recall a Program lt lt Recall a Program gt gt _ 01 Default Flat 01 02 Default Flat 02 ENTER 03 Default Flat 03 04 Default Flat 04 05 Default Flat 05 06 Default Flat 06 07 Default Flat 07 08 Default Flat
14. NE Manual 114015533094 gt o C lt D JJ O m o JJ DFP 225 Digital Feedback Eliminator IMPORTANT SAFETY INSTRUCTIONS A Note in order to ensure safety please read these instructions carefully All safety and operating instructions should be read before the productis operated Attention To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture Ventilation Do not block any a ventilation openings TESEN pi Cleaning T A Clean only with dry cloth Heat sources Do notinstall near any heat sources suchasradiators stoves or other apparatus that produce heat p gt SESS E Ty Power cord proctecion Protectthe power cord from being walkedon or pinched particularly at plugs Overload v b Power plug should Os not overload B Objects or liquid entry inside the unit Be careful that no objects fall or liquid is spilled inside the unit through ventilation openings Humidity The unit should far away form water E Maintenance Refer all servicing to qualified service personnel To prevent the risk of shock do not attempt to service this equipment yourself because opening or removing covers may expose you to dangerous voltage or other hazards DFP225 Digital Feedback Eliminator User Manual Described
15. TL spor CT ICE ux The DFP225 Digital Feedback Eliminator is based on a powerful analog and digital DSP platform having the following specifications Analog Input Signal Left In Right In Bal Female XLR Maximum Input Level 20dBu Analog Output Signal Left Out Right Out Bal Male XLR Maximum Output Level 20dBu Digital Processing DSP SAM3716 24bits data x 96 bits coeff A D Converters AKM5392 24bits D A Converters AKM4396 24bits Sampling Frequency 48kHz S PDIF Stereo Digital Input 32kHz 44 1kHz and 48kHz Sources Accepted S N 110dBA THD N 0 005 Frequency Response Bypass 20Hz 20kHz 1 dB Power Supply Switching Power Supply Remote Control USB RS485 31 China Office 4 5Floor Building B No 885 Shenzhou Road Science City Guangzhou China Tel 86 20 62845258 59 60 Fax 86 20 6284525 lt A MAINS e Http www marani com cn
16. The DFP225 on its back panel is providing a couple of switches allowing to connect or left unconnected the power Supply Main GND to the chassis MAIN LIFT GND Switch Actually can happen that sometime it is necessary to NOT connect the Main Ground to the Chassis in order to avoid GND loops This is possible using the MAIN GND LIFT switch When the switch is positioned on GND the Main Power Supply GND is connected to the Chassis 28 Feedback Eliminator s Channels EDIT MUTE and Feedback Elimination process Limiter s Channels UTIL BYP Last Edited Parameter Return Function Once you have escaped out of parameter editing within the individual Feedback Eliminator s Channel or Feedback Elimination process s Channel the DFP225 will remember this last editing action on that Channel When you return for your next editing action pressing the EDIT button on that channel will immediately return you to the screen related to this last editing action This function makes fine tuning or modifying easier when it is necessary to make a number of adjustments to the same parameter in a short time sequence Feedback Eliminator s Channels and Feedback Elimination process Limiter s Channels LINK Function The DFP225 is able to perform a unique LINK MODE between Feedback Eliminator s Channels as well as a link between Feedback Elimination process s Channels to enable quick and immediate editing you cannot link Feedback Eliminator s to Feedback Elimination
17. ailable the microcontroller will notify that to the user sending back the following frame RX STX DM CMD D1 D2 D3 D4 D5 D6 D7 ETX FOH CIH XX 1BH FFH 00H 00H 00H 00H 00H 00H 00H F7H 29 Input Gain and Output Volume Control UPDATE GAINS PHASE CMD 01H A The User has to send the following Command including the value to be assigned to Vol for modifying the Input Gain Chn 0 1 or the Output Volume Chn 2 3 Also the Output signal Phase can be modified TX STX ID_M ID_N CMD DO DI D2 D3 D4 DS D6 D7 ETX FOH CIH 01H Chn 00H 00H 00H 00H 00H Phs Vol F7H XX 0 31 ID device Chn 0 3 Channel selected 0 1 In1 In2 2 3 Outi Out2 when Channel 1 selected then Vol Input Gain when Channel 2 3 selected then Vol Output Vol Phs Phase only if the Chn gt 1 Value 0 1 where O direct 1 inverse 180 Vol Gains from 0 to 180 12dB 6dB step 0 1dB B If the command has been properly executed and the Gain Volume modified then the microcontroller will send back to the User eg Crestron AMX Remote Control the same frame used by the command RX SIX IDM IDN CMD DO D1 D2 D3 D4 D5 D6 D7 ETX FOH CIH Xx 01H Chn 00H 00H 00H 00H 00H Phs Vol F7H 30 DFP225 Technical Specifications FECE ours inputs 2 temo OUT T
18. all full band used as energy evaluation areas by the scanning process and the probability algorithm used for the feedback identification As more the sensitivity is high as faster is the Feedback Detection Elimination but also higher is the possibility that the algorithm will think to have detected a feedback there where the energy difference between neighbors sub bands it is just due to the normal Audio harmonic content As less the sensitivity is Low as lower is the risk of confusion but higher is the risk of detecting the eventual feedback a little too late than the expected elimination time with the undesirable consequence of an audible whistle lasting for a while before to be eliminated The Sensitivity can be set using the PM2 OR PM3 encoder and is ranging from 0 Actually Feedback Eliminator OFF up to 99 High Sensitivity quick Feedback Elimination High possibility of misunderstood detection Note the sensitivity value can even depend from the Input level of the signal if the input level is considerably low a higher Sensitivity is suggested Note 1 When the input level is adjusted so to to be nearly close to the max level a sensitivity ranging between 60 and 75 could work fine 26 Front Panel s Notches Led Bar On the DFP225 front panel is available a powerful Notches Led bar showing the number of used Manual Notch Filters made active or not and the number of Automatic Notch filters placed by the Feedback
19. ckwise the NAV PAR1 encoder Once selected the sub menu page using the ENTER button can be accessed the Sub Menus pages again scrollable using the NAV PAR1 encoder and accessible for the parameters editing pushing again the ENTER button Through the ESC button it is any time possible to go back to the action and page preceding the ENTER button use Once inside the Sub Menus pages the several options can be scrolled and using the PM2 or PM3 encoders and selected confirmed pushing the ENTER button Note In every Sub Menu the option currently selected running will have an asterisk showing to the right of the description on the LCD screen Options that are not selected running will be displayed with NO Asterisk Pushing the ENTER button on an unselected option will mean an asterisk will then appear and this option will now take over asthe currently selected running option System Utilities Sub menu this sub menu allows to access several operations related to the DFP225 Start Up and General Configuration From the System Utilities Sub menu pushing ENTER and then using the NAV PAR1 encoder for scrolling will give access to the following pages System Setup this gives you the ability to select the way of working of the DFP225 The DFP225 is a powerful unit able to perform the feedback elimination using 2 different elimination processes 1 Notch Filters Insertion Method in this case the system is au
20. editing the Limiter s Attack Time A Release Time R and Active Threshold Once pushing ENTER the above screen will change as follows 5ms R 0 2s The Attack Time A can be edited using the NAV PAR1 encoder the Release Time R the PM2 encoder and the Limiter Active Threshold the PM3 encoder Attack Time A the selectable range of the Limiter s Attack Time is from 5ms to 200ms in steps of ims from 5ms to 20ms then 5ms from 20ms to 30ms then 10ms from 30ms to 100ms and 20ms from 100ms to 200ms The Limiter s Attack Time can be adjusted by rotating the NAV PAR1 encoder Release Time R the selectable range of the Limiter s Release Time is from 0 15 to 3s in steps of 0 1s and can be adjusted by rotating the PM2 encoder Limiter Active Threshold the selectable range of the Limiter s Threshold is from 20dB Limiter not active to 10 0dB in steps of 0 2 dB and can be adjusted by rotating the PM3 encoder Volume page from this screen it is possible to set the Feedback Eliminator s Channels Output Level from 12dB to 6dB press ENTER an arrow will appear on the left of the screen gt then use the PM1 or PM2 buttons The value set on this screen will only affect the output level of the selected Feedback Eliminator s Channel The following is an example screen for the Volume page where the Volume of the Feedback Eliminator s Channel 1 named Left is set to 0 0dB
21. elect the location for a preset from the 24 available by using the PM2 or PM3 encoders Once the desired location appears on the screen press ENTER again to reach the Set Program Name page In this page the User can enter a Preset Name up to 16 Characters by using the PM2 or encoder to choose a character and the NAV PAR1 encoder to move between the 16 available locations for the character s positioning The current position of the cursor is shown by a blinking underscore 11 The following is an example of a screen while entering the preset name Velvet Club in location 10 Program Na Velvet Club To store the Preset Name press the ENTER button again The above action will take you to the Enter to Save page showing the selected location for the preset and the final edited name is Velvet Club Pressing ENTER again will store the preset in the selected location with the chosen name and the following transitory screen will appear on the LCD Once the preset is stored the above screen will disappear returning to the following screen If during the Preset Storing process you want to overwrite an existing memory location select this location in the Save a Program page then ENTER and you will be asked if you want to overwrite this preset with the following ENTER to Overwrite screen displaying the currently stored preset and location If you wish to proceed pr
22. ess ENTER again and the DFP225 will go ahead with the Set Program Name page and the subsequent overwrite on completion of the previously described storing process Note at any time it is possible to quit the storing action by pressing the ESC button 12 _ Delete a Program this page allows you to delete a preset already stored in the DFP225 memory By pressing the ENTER button and rotating the PM2 or PM3 encoder it is possible to scroll through the previously saved presets and the available empty locations identified by Empty Memory If no user presets are stored the Delete a Program screen will show empty memory locations for all 1 24 presets as shown in the example below for location 10 By using the PM2 or PM3 encoder it is possible to select a preset to be deleted Pressing the ENTER button on a selected preset will bring up the Enter to Delete page showing the selected preset For example if we want to delete the preset 10 Velvet Club the screen will be the following Confirming the deletion by pressing ENTER again will force the DFP225 to erase the selected preset and the following transitory screen will appear Once the preset is deleted the above screen will disappear returning to the following screen Note At any time it is possible to quit the deleting action by pressing the ESC button Interface Utilities Sub menu
23. for each channel once selected the number of filters destined to the Automatic Detection Elimination algorithm the remaining filters will be available to the user as Manual fully editable Notch Filters So if set at 12 the number of filters for the Automatic Placement by the Detection Elimination algorithm 13 more Notch Filters will be available as Manual Notches The number of Automatic Notches can be set using the PM2 OR PM3 encoder Bandwidth of Auto Notch page from this page it is possible to set the Bw has to be used by the Automatic Notch Filters that the DFP225 Feedback Detection Elimination algorithm will be allowed to use for the Automatic placement after the feedback detection This parameter is in the Hands of the user because its value can affect the Speed of the Detection Elimination process but at the price of a Sound Quality decrease If the Notch filter used by the detection elimination process is a very thin one with a very small Bw value as in example 1 70 then the Audio quality will be affected just a few but the feedback detection speed will be slower With a bigger Bw value as in example 1 5 the speed will be faster but the band modification due to the filter action will be more evident So why for good results need to find the best compromise Speed Quality and this is left case by case in the hands of the user 23 If in example there are no specific necessities a good compromise could be the
24. ill also need to use the PAR1 encoder eg filter parameter settings The UTIL BYP buttons have a double functionality allowing to enter the Utility pages editing session if quickly pressed and released otherwise if pressed for at least 2 seconds they allow to BYPASS or ACTIVATE the selected channel s Feedback Elimination Process To ACTIVATE the Feedback Detection Elimination process for each channel independently once set properly the all parameters has to be used the UTIL BYPASS buttons at the bottom ofthe LOUT ROUT led bars When pressed UTIL BYPASS buttons for at least 2 seconds the related led on top of the buttons will turn RED and the Feedback Detection Elimination process is ACTIVE When the related led on top of the buttons is OFF or just BLUE for Editing purposes OR JUST BLUE FOR EDITING PURPOSES the Feedback Detection Elimination process is in BYPASS MODE NOT ACTIVE Note All parameter editing can be done using the NAV PAR1 PM2 encoders and the current shown value of the selected option is AUTOMATICALLY loaded during the encoders use and stored as the current value once leaving the page Number of Auto Notch page from this page it is possible to set the number of Automatic Notch Filters that the DFP225 Feedback Detection Elimination algorithm will be allowed to use for the Automatic placement after the feedback detection Being 25 the overall amount of notch Filters available on the DFP225
25. is not accessible in editing and is working on the base of the setting selected by the user within the Utility Menu accessible through the UTIL BYP buttons at the bottom of the LOUT ROUT led bars The number of Manual Notch Filters is depending from the setting within the Utility Menu accessible through the UTIL BYP buttons at the bottom of the LOUT ROUT led bars thousands Hundreds units selection Freq 20Hz Same as PAR2 20000Hz PAR1 N A Bw 1 5 Attenuation 0dB 1 70 30dB MENU LOUT ROUT Output Channels and Utilities Access by pushing the UTIL BYP buttons NAV PAR1 Encoder NAV PAR1 Enc PM2 Enc PM3 Enc to navigate between menus to chose values for the parameters no need to confirm the chosen values which are automatically loaded during the encoders use 1 Ch 1 2 Left Right Nr aut notch Num auto notch 12 ENTER ESC gt Num auto notch 12 PAR1 N A 01 Same as PAR2 24 2 Ch 1 2 Left Right Bw aut notch Bw auto notch 1 10 ENTER esc gt Bw auto notch 1 10 PAR1 N A 1 5 Same as PAR2 1 70 3 Ch 1 2 Left Right Rs aut notch Reset auto notch Var enter ESC gt Reset auto notch Var PAR1 N A Fix Same as PAR2 Var 4 Ch 1 2 Left Right Reset Mode Reset mode Slow ENTER ESC gt Reset mode Slow PAR1 N A Slow Same as PAR2 Fast 5 Ch 1 2 Left Right Flat A notch Flat automatic notch ENTER 2 ESC Flat automatic notch PAR1 N A PAR
26. n the Confirm Password page matches the one entered in the Enter Password page the following screen will appear Confirm Password DFP225 The Password is now configured and held in the device s memory The user can now decide to lock the DFP225 by Password inhibiting the access to ALL Feedback Eliminator s functions depending on the setting of the parameter Password Enable Disable explained in the following paragraph 16 Enable Password from the Enable Password sub menu SECURITY UTILITY User Password Press to gain access to the Enable Password screen E F Enable Password word Disable Once a Password has been entered into the DFP225 through the steps described in the previous paragraph it is possible to Enable or Disable the password function and therefore lock the DFP225 restricting access to all functions When a password has been entered you will be able to select the Enable option from the menu and the unit will not be accessible for editing In Locked by Password Status all DFP225 functions are inhibited to the User including the use of the Mute EDIT MUTE and UTIL BYP buttons The only access available is to the parameters of the input output channels accessible by pressing the edit button ONLY to READ the values no editing possible if the be shown flag in the Show Parameter Sub Menu has been selected Once Locked
27. ns that once the unit is locked the parameters will not be shown at all With this option when trying to access a parameter the following Screen message will appear Lock Unit this sub menu allows the user to lock the device so no parameters can be edited or modified When the Unit is in an unlocked condition all parameters will be available for editing When you select On all parameters will be locked and are not available for editing When you select lock from the menu the unit will be locked and the lock menu automatically exited The screen will revert to the Default showing the current Feedback Eliminator s preset selected and beside the preset s name a keylock icon indicating that the DFP225 is locked 15 User Password from the User Password sub menu Press ENTER to access the User Password page User Password Using the PM2 or PM3 encoders to choose a and the NAV PAR1 encoder to move between available locations you can enter a 6 Character Password Name The current position of the cursor for the characters to be entered is shown by a blinking underscore During this editing phase the display is as follows if we were using DFP225 as the password Im User Password i DFP225 m The DFP225 will exit the Unit Lock sub menu jump to the User Password sub menu page screen If the password entered i
28. of the Master channel during a Link session will automatically terminate that session The Link will also be automatically terminated if during the editing of Feedback Elimination process s Channels you jump across to begin editing an Feedback Eliminator s Channel or vice versa 27 USB RS485 Remote Control protocol for Preset Changing and Gain Volume controls The following is the HEX Code for controlling the DFP225 recall presets and master volume control Preset Changing CMD_RECALL_PRESET CMD 1BH A The User has to send the following Command including the number of the preset to load on the unit TX SIX IDM IDN CMD DO D1 D2 D3 D4 D5 D6 D7 ETX FOH CIH XX 1BH NPreset 00H 00H 00H 00H 00H 00H 00H F7H XX 0 31 ID device Npreset 0 31 Presetnumber The DFP225 s microcontroller will check if the Preset is initialized available or not yet created B If YES then the microcontroller will send back to the User eg Crestron AMX Remote Control the same frame used by the command RX STX IDM ID N CMD DO DI D2 D3 D4 DS D6 D7 ETX FOH CIH 1BH NPreset 00H 00H 00H 00H 00H 00H 00H F7H So in this case if the user gets back EXACTLY what was sent the preset is existing and loaded on the unit C If the preset that the user wanted to load is NOT YET INITIALIZED not yet created so not av
29. process s channels To link channels when editing you will need to select a Master channel that will be the one to be edited and have it s parameters displayed on the LCD screen You can then select and link the other channel Slave that you wish to apply the same changes to To enter a link mode session select the Master channel Edit mode then link the Slave by pressing their related Edit buttons Once Linked the channels will be selected ready for adjustment when their Blue LED is lit in the Editing mode Now the Slave channel will modify its parameters accordingly as you edit the Master channel All other existing parameters will stay the same within the Slave Channel unless edited by this link with the Master channel Note The LINK function is NOT a COPY function If we want to edit the Limiter of the Feedback Eliminator s Channel 1 named Left we can enter the editing mode of Feedback Elimination process s Channel 1 by pressing the related LOUT Util button and turning on the Blue LED below the LOUT LED meters This assigns the role of Master and displays this channel s parameters on the LCD Then press the Edit button of Feedback Elimination process s Channel 2 turning ON its related Blue LED s Now all parameters edited on Feedback Elimination process s Channel 1 will also be applied to channel 2 If we want to remove the linked channel from the Link press the related Edit button Exiting the editing
30. r position from the 6 available by rotating the NAV PAR1 encoder then by using the PM2 or PM3 encoder it is possible to select the desired character Once you are happy with your name selection press ENTER to confirm the edited Name The new name will be stored The following example shows Ch A replacing our previous name of Left Source page from this page it is possible to assign one of the following Inputs to any Feedback Eliminator s Channel Analog InA Input Channel A Analog InB Input Channel B Analog InA B Sum of Input Channel A 2 Input Channel B 2 Digital Left Input S PDIF Channel Left Digital Right Input S PDIF Channel Right Digital L R Sum of Input S PDIF Channel Left 2 Input S PDIF Channel Right 2 The following is an example screen for the Source where Analog Input A is assigned to Feedback Eliminator s Channel 1 named Left After pressing ENTER an arrow will appear on the left of the screen gt the Input can be selected by rotating either the PM2 or PM3 encoders Gain page from this screen it is possible to set the Feedback Eliminator s Channels Level from 12dB to 6dB press ENTER an arrow will appear on the left of the screen gt then use the PM1 or PM2 buttons The value set on this screen will only affect the input level of the selected Feedback Eliminator s Channel EDIT MUTE The following is an example screen for the Gain
31. r selecting and setting the parameter values On some parameters that have three independent values you will also need to use the PAR1 encoder eg filter parameter settings The EDIT MUTE buttons have a double functionality allowing to enter the editing session if quickly pressed and released otherwise if pressed for at least 2 seconds they allow to MUTE the selected channel and the related LED will turn RED For UN MUTE the MUTED channel it is enough to press again for at least 2 seconds the EDIT MUTE button Note All parameter editing can be done using the NAV PAR1 PM2 and PM3 encoders and the current shown value of the selected option is AUTOMATICALLY loaded during the encoders use and stored as the current value once leaving the page Feedback Eliminator s Audio Signal Channels EDIT MUTE Path Block Scheme S PDIF Left A eH cht out CH1 Input ICh2 Out 59 Name page from this screen it is possible to assign a 6 character name to the Feedback Eliminator s Channel The following is an example screen for a Name page labeled Left for the Feedback Eliminator s Channel LIN Ch1 To Edit press ENTER on the Name Page and the entering arrow will appear as in the example below 18 The first letter position will be blinking Select the Characte
32. re available FADE In Off when the DFP225 is turned on all Outputs regard of their status before the Unit was switched off willbe MUTED or UNMUTED automatically meaning the DFP225 will have no active Outputs or active Outputs during the start up process depending from the Outputs previous status FADE In On when the DFP225 is turned on all Outputs not previously muted before the Unit was switched off will be active meaning the DFP225 outputs will be controlled by a volume ramp to avoid any sudden sound If the option Fade In On is selected the screen will show the following Delay Time Distance this page allows you to select the measurement unit to be used for the Delays Time in milliseconds ms or Distance in meters m By pressing ENTER and rotating the PM2 or PM3 encoder it is possible to select the measurement unit to be used for the delay which will be confirmed by pushing the ENTER button The following screen shows the selected delay measurement is Time milliseconds Delay Units Init Time ms _ Ramps on changes this page allows you to activate or de activate Fading in and Fading out ramps on the input output volumes when any parameter changes When connected to the DFP225 by the PC remote control software it is possible to request sudden parameter changes where the difference between the old parameter and the new one can cause unwanted click noises big differences in vol
33. ressing Enter Button the page for the Manual Notch Filter Center Frequency will be entered The Center Frequency of the Parametric Filter can be edited using the NAV PAR1 encoder the BW the PM2 encoder and the Gain the PM3 encoder 21 Particularly using the NAV PAR1 encoder can be quickly set the desired Canter Frequency for the Notch Filter even this one can be set with a resolution of 1Hz In order to quick set the Frequency even the resolution is so sharp the NAV PAR1 encoder is used to edit separately the Thousands the Hundreds and the Units of the Frequency to set Rotating the NAV PAR1 encoder clockwise and counterclockwise the Thousands Hundreds and Units fields of the Frequency digits are independently selected Which is the currently selected field is shown by blinking underscore s If in example the currently selected field is the one of the Units then the screen will show the following Where the underscores will blink alternatively with the current selected numbers PM2 and PM3 will allow to set the desired digits for building the final desired Center Frequency Center Frequency the selectable frequencies range is from 20Hz to 20kHz in steps of 1Hz and can be adjusted by rotating the NAV PAR1 encoder for the Thousands Hundreds and Units field selection and by PM2 or PM3 encoders for the digits selection From the Center Frequency page pressing again the ENTER button it possible
34. s Outputs UTIL BYP buttons allow the User to access UTILITY functions related to the Feedback Eliminator UTIL BYP The BYPASS functions allows to bypass the Feedback Eliminator process setting UTIL BYP As understood the EDIT MUTE as well as the UTIL BYP buttons have double functions dependent on the push and hold time When the EDIT MUTE buttons are pushed and held for more than one second Input Channels LIN or RIN are either muted or unmuted The red LED will illuminate when the Channel is muted When the MUTE LED is OFF then the related Input Channel is UN MUTED A momentary push of the EDIT MUTE buttons enters the Editing Mode for the Feedback Eliminator s Channels see later for the Feedback Eliminator s Channel Editing details The blue EDIT LED will now be ON When the UTIL BYP buttons are pushed and held for more than one second the Feedback Elimination process will be either bypassed The red LED will illuminate when the Feedback Eliminator s will be flat When the BYPASS LED is OFF then the related Feedback Eliminator s Output Channel is performing the current setting A momentary push of the UTIL BYP buttons enters Utilities functions for the Feedback Eliminator s Channels see later for the Feedback Eliminator s Utilities Functions details The blue UTIL LED will now be ON DFP225Menu and Sub Menu Structures As stated above the start up default screen is the following factory preset DFP225AVB
35. structural problems as its shape and geometry In a such condition once eliminated the feedback better to rescue the full original band of the signal removing the placed notches If in example there are no specific environmental problems the Var option can be chosen The Reset of the Automatic Notches can be set using the PM2 OR PM3 encoder and can assume the position Fix or Var Notch Filters Reset Mode page if in the previous page the Var way of working o for the automatic notches is selected in the Notch Filters Reset Mode can be decided the Notch Filters Removal Speed so can be decided how fast the placed notches will be reset There are 2 available speed SLOW and FAST The Reset Speed of the Automatic Notches can be set using the PM2 OR PM3 encoder and can assume the position Slow the filters are removed after 1 second from the feedback elimination or Fast the filters are remove immediately after the feedback elimination 24 Flat Automatic notch page this utility is allowing to clear the all filters of the related Feedback Eliminator s Channel placed Automatically by the Automatic Feedback Detection Elimination process when working in Fix mode If selected the Feedback Eliminator s Channel 1 named Left the screen will be the following Flat A Not Flat automatic notch iy Once pushing ENTER the DFP225 will ask the confirmation before to clear the all filters un Hm P
36. to access the Bandwidth and attenuation page Here it is possible using the PM2 and PM3 encoders to set the desired Notch Bandwidth and Attenuation Notch Depth Bandwidth BW the selectable BW range is from 1 5 Octave 0 2 up to 1 70 0 014 Octave in 4 fixed values 1 5 1 10 1 20 1 70 and can be adjusted by rotating the PM2 encoder Attenuation the selectable Attenuation range is from OdB to 30dB in steps of 1 dB and can be adjusted by rotating the PM3 encoder When a Manual Notch Filters is set by the user once the attenuation parameter is set at a value different from OdB the led corresponding to the set manual filter on the DFP225 front panel s notches led bars will turn ON 22 MENU A B Output Channels Utilities Access by pushing the UTIL BYP buttons From the Default Screen it is possible to access the Feedback Eliminator s Channel Utilities menu by pressing the UTIL BYP located at the bottom of the LOUT and ROUT Led bars Once the button is pressed the related blue UTIL BYP LED willturn ON The Sub Menu pages can now be scrolled through by rotating clockwise and counter clockwise the NAV PAR1 encoder For parameter editing it is necessary to press ENTER and an arrow will appear on the left of the screen gt Then use the PM2 and PM3 encoders for selecting and setting the parameter values On some parameters that have three independent values you w
37. tomatically looking for Feedback Tones occurring and when detected it place one or more notch filters centered on the detected feedback frequency 2 Band Frequency Shift Method in this case no filters are use for the feedback elimination and instead is activated a Down Frequency Shift of the all band by a percentage ranging from 0 up to 1 13 By pressing ENTER and rotating the PM2 or PM3 encoder it is possible to choose between three options Notch Freq Method 1 Freq Shift Method 2 or Fsh Nfrq Mixed process using both Methods at the same time The currently running option will be displayed with an asterisk to the right of the option description To change the option simply ENTER on the option not displaying the Asterisk and that option will become active and an Asterisk will now appear to the right of the option description _ Power On Procedure this gives you the ability to select the option that will apply when the DFP225 powers up after being switched on By pressing ENTER and rotating the PM2 or PM3 encoder it is possible to choose between two options Fade In On or Fade In Off The currently running option will be displayed with an asterisk to the right of the option description To change the option simply ENTER on the option not displaying the Asterisk and that option will become active and an Asterisk will now appear to the right of the option description The following two options a
38. ume changes or bumps big differences in Hp Lp filters cutting frequency values as the DSP reconfigures The Fading In and Fading Out ramps eliminate any potential clicks and bumps This function can be de activated when the unit needs to be used in live conditions and small parameter adjustments are requested on the fly during live performance The following screen shows the Fading ramps function is Off and therefore de activated Software Version this page allows you to confirm the Software Version running on the DFP225 The correct Software Version is V1 00 Program Utilities Sub menu this sub menu allows you to access several options related to the DFP225 operating mode and to manage the presets stored and recallable within the Unit By pressing the ENTER button and then using the NAV PAR1 encoder the following pages can be accessed Recall a Program this page allows the Loading of a preset program The DFP225 already is containing 8 Factory presets occupying the first 8 positions of the The 8 Factory presets are the following 1 Default Flat 01 2 Default Flat 02 Default Flat 03 Default Flat 04 Default Flat 05 Default Flat 06 Default Flat 07 Default Flat 08 You can store up to 24 presets in the DFP225 memory starting from the location 09 to the location 32 Through the Recall a Program page the Factory and the available user s preset can be
39. ushing ENTER again the DFP225 will clear the all filters notches placed by the Automatic Feedback Detection Elimination process when working in Fix mode Flat Manual notch page this utility is allowing to clear the all filters of the related Feedback Eliminator s Channel placed Manually by the User If selected the Feedback Eliminator s Channel 1 named Left the screen will be the following Once pushing ENTER the DFP225 will ask the confirmation before to clear the all filters Pushing ENTER again the DFP225 will clear the all filters notches placed by the User Speed Frequency page when the DFP225 is used with its embedded Band Frequency Shift Algorithm for the Feedback Elimination the full band of the original signal is shifted Down of a desired percentage which can be set with continuity by the user from 0 up to 1 13 in 100 steps This following page allows to set the so called SPEED of the Frequency shift The choice to use as name of the parameter Speed is due to the intuitive understanding that can be achieved just looking at the oscilloscope the original signal and the shifted one if using a sinusoid just going from 0 up to the maximum speed the frequency shifted sinusoid will appear moving faster and faster compared to the static original one used as reference for the synch Flat Freq 60 Speed Amount of Frequency shift operated on the processed signal respect the original one ranging from 0
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