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IV-4 – THE DORROUGH METER        

 

 

 

The "Dorrough" plug-in displayed in the main window.

 

 

The famous 

Dorrough meter 

is now available in the DVP as a Plug-In. This 

Dorrough 

IDT model

 is the result of an association between 

IDT and Dorrough

 

constituted so as to offer the best in measurement of the peak and loudness levels in 

order to get an incredible audio quality!

 

Digital Dorrough meters are based on unique algorithms to measure the loudness 

and peak level of the signal, both measures linked on a 

40 dB FS scale

 in one bar 

graph. Besides, to get more comfort in the visualisation, 

each led represents one 

dB!

 

1.

 

You can control your peak level thanks to the led always located at the right 

of the others.

  

2.

 

The last 3 leds on the right are red to warn you that your signal is about to 

saturate as it will go further than 0dB FS! These 3 leds are from -3 to 0 dB FS.

  

3.

 

Concerning the loudness, there are 3 other red leds you can use as a 
reference for your loudness level.

  

4.

 

Moreover, you can move these 3 leds from -14 to -4dB FS to follow the 
maximum loudness level you want to reach (only possible on the IDT model).

  

Special thanks to 

Mike

 and

 Kay Dorrough 

for letting us use the Dorrough meter.

 

 
 

 

 

 

85

Summary of Contents for DBP 7+4

Page 1: ...Digital Band Processor 7 4 1...

Page 2: ...hey should ideally be changed for 4AT 250V The equipment needs an AC power supply of 115 Vac or 230 Vac 50 60Hz and must be properly earthed There is an earth screw on the equipment for that purpose S...

Page 3: ...for example placing polystyrene pads between different boxes The processor will have been delivered with an install CD this manual the packaging case an RS232 cable and a mains cable Should any of th...

Page 4: ...d your processor have been exposed to fluids smoke or dust it must be thoroughly cleaned However your processor should not be opened unless you have the authorisation from a technician from IDT Sound...

Page 5: ...that products referenced this above to which refers this declaration relate satisfy the provisions of Directive s of the council n 73 23 EEC of February 19th 1973 modified by the Directive n 93 68 EEC...

Page 6: ...Digital Band Processor 7 4 Audio Processor User Manual 6...

Page 7: ...ion of Conformity 5 Abbreviations 9 I INTRODUCTION 11 WEEE 11 II INSTALLATION 12 Physical Installation 12 Electrical Installation 13 II 1 Connections 14 XLR audio in Out 14 XLR AES EBU In Out 16 RS 23...

Page 8: ...Window 55 5 The state bar 55 6 The Key Tools Window 56 7 The other Tags 57 III 2 The first settings 59 1 Setting the levels 59 Setting the TX level 59 Setting the analogue and digital levels 60 2 The...

Page 9: ...dBm in an impedance of some load DHCP Dynamic Host Control Protocol DI Decoder Information DSP Digital Signal Processor E S Entr e Sortie EBU European Broadcasting Union EMI electromagnetic interfere...

Page 10: ...multipoint TA Traffic Announcement TCP IP Communication Protocol THD Total Harmonic Distortion TP Traffic Program TX Transmitter UECP Universal Encoder Communication Protocol V Volt Vcc Volt Crete Cr...

Page 11: ...of its own in all respects The heart of the FFT processor has been totally revamped and as a result much improved New functions have been brought in to enhance precision and to make the settings more...

Page 12: ...or the ventilation has been studied to make sure that all heat generated is evacuated Air is sucked in by two ventilators placed on the right and is expired at the rear and to the left of the unit The...

Page 13: ...e rack The right fuses The fuses in the power supply are standard 2AT 250V In case of use on a 115 Vac network they should ideally be changed for 4AT 250V The equipment needs an AC power supply of 115...

Page 14: ...need to use a male XLR to bring the audio into the DBP 7 4 The DBP 7 4 has a balanced electronic input IMPORTANT the input can receive balanced and imbalanced signals XLR Output The audio output conn...

Page 15: ...pe Electronically balanced Cabling Ground 1 Hot point 2 Cold point 3 Impedance 10 K Maximum level 24 dB Output Type Electronically balanced Cabling Ground 1 Hot point 2 Cold point 3 Impedance 600 Ohms...

Page 16: ...Output The audio output connectors are male so you need female XLRs to take the signal out of the DBP 7 4 The DBP 7 4 has an advanced synch mode To ensure a perfect synchronisation whatever the digita...

Page 17: ...pecifications Input Type Balanced on transformer AES type AES 3 Professional Cabling Ground 1 Hot point 2 Cold point 3 Impedance 110 Ohms Maximum Level 0 dBfs Output Type Balanced on transformer AES t...

Page 18: ...ptimised for use with a modem but can still be used for normal communication use ATTENTION The RS 232 connector described above is replaced by the connector situated on the right of the RJ45 connector...

Page 19: ...as an RJ45 Ethernet port available for an IP link internet Protocol LEDs can be viewed next to the connector to show the state of the network Connector type RJ45 Cabling 10 Base T LEDs TX data out RX...

Page 20: ...resets by linking ground to one of the First 10 pins The DBP 7 4 can also replace the AF lists of the RDS coder and cross the stereo coder in stereo or mono mode Specifications Connector type SUB D 25...

Page 21: ...e the highest quality cable 2 Connector type BNC female Cabling Ground body of the connector Hot point central Pin Impedance 75 Ohms Level delivered inity to 22 dB From inf Length of cable advised 2 m...

Page 22: ...central Pin Impedance 5k As any stereo coder the DBP 7 4 is endowed with a synch 19 kHz output this one is delivered on a BNC female connector Specifications for synch 19 kHz Connector type BNC female...

Page 23: ...ter To ensure optimised ventilation never obstruct these outlets WARNING to guarantee an optimised protection to respect the Low Power Directives standards we advise you to always use ceramic temporis...

Page 24: ...Specifications Connector type IEC Fuse Type Pour 115V 4AT 250V Pour 230V 2AT 250V Power From 88 to 132 VAC 176 to 264 VAC automatic switch Consumption 110V 240V 130 VA 24...

Page 25: ...The Up button allows you to scroll up or move a selected value up The Down button allows you to scroll down or reduce a selected value Enter validates your choice Setting the contrast 1 Press TAB and...

Page 26: ...etting cursor for the phones level o Press Up or Down to increase or decrease the level of the phones o Press Enter when you have the level desired You can define a display by default By pressing the...

Page 27: ...Windows 95 Windows 98 and 98SE Windows NT 4 0 from SP3 Windows 2000 Windows XP In any case you must have installed the Internet Navigator Explorer 5 5 minimum for the on line display Installation Ins...

Page 28: ...Read the user license attentively accept then click Next Chose the type of installation desired depending on the processor you have acquired 28...

Page 29: ...the configuration tool for the Ethernet card if you have this option installed in your processor and place an icon for the application and or the upgrade tool on your desktop or in the Quick Launch ba...

Page 30: ...e folder where the software will be installed by default C Program Files IDT Sound Processing and click Next You can modify the place where you find your shortcuts in the Start menu of Windows Click I...

Page 31: ...ore info Wait for the end of the installation You should restart your PC to make sure the software has been installed correctly You could wait but we can t guarantee that the software will launch corr...

Page 32: ...port of the processor The necessary cable is not supplied by IDT Sound Processing Corporation IDT Sound Processing Corporation can only guarantee that the modem connection works correctly with modems...

Page 33: ...you want to connect the DBP 7 4 to and click OK The COM Port selected will be memorised for the next connection When you are connected to another COM Port or you want to change the type of connection...

Page 34: ...wing To access these parameters go to the peripherals manager and double click the COM Port you want to parameterize Different configurations can work but IDT Sound Processing Corporation cannot guara...

Page 35: ...ort of the PC the modem is connected The software will then display phone book of the DBP 7 4s to which you can link up by modem By clicking New Entry you can add a DBP 7 4 by entering the name of the...

Page 36: ...e sure of your pass word protection For a connection via TCP IP you have to know the IP address of your processor DHCP By default the Ethernet cards supplied by IDT Sound Processing Corporation are co...

Page 37: ...to your processor To do so you must have loaded the IP Remote Manager software Connect your PC to the RS232 serial port located next to the RJ45 of your processor Launch IP Remote Manager via the shor...

Page 38: ...splay the results of its research Select your processor and click next NB This window can be useful for your network administrator He can read the MAC addresses of your processors essential to create...

Page 39: ...etween your PC and the processor This window will also allow you to return to a DHCP By default the TCP communication of our processors is 5001 This parameter can be changed Ask your network administr...

Page 40: ...accepts or refuses connections coming from different IP addresses These parameters should be set up with the administrator To finish click End The programme will then send the configuration to your p...

Page 41: ...NTP Simple Network Time Protocol This function so allows synchronizing the hour of your processor as well as the integrated functions as the RDS On this screen you specify the Time Zone the IP address...

Page 42: ...been specially conceived to facilitate the update of processors 2U DVP and DBP IDT Sound Processing Corporation This software is included in the program of standard installation which was delivered to...

Page 43: ...Click the drop down menu in the top of the window to select the communication port The following screen displays 43...

Page 44: ...u go to make To select the Upgrade to make two possibilities are offered to you 1 By the drop down menu as this below 2 By clicking Browse the following window displays Select the file of Upgrade whic...

Page 45: ...date Thus watch to avoid updating your processor when it is in the antenna Also the updates develop the firmware of the device and erase all the data of the device IDT Sound Processing Corporation tri...

Page 46: ...During the state of the Upgrade the software will ask you to make a switch off of your processor during some seconds At the end of the Upgrade the software shows the following screen 46...

Page 47: ...s not show this screen please switch off and switch on your processor then begin again the process since the beginning In case of new failure of the update please contact immediately IDT Sound Process...

Page 48: ...he standard installation programme which has been delivered with your unit An icon is created in the start up menu programs IDT Sound Processing Tools To make this update you have to use the connector...

Page 49: ...Click the icon Serial Port Connection the following screen displays Select the processor to be updated and click on Next button 49...

Page 50: ...When the IP board was updated the following screen displays Click Finish then on Yes or No according to if you have another card IP to be updated 50...

Page 51: ...place them Click or double click one of them depending on the type of connection you have chosen The software will start by doing an inventory of the equipment and plug ins contained in the unit If t...

Page 52: ...liarize yourself with the Window as it will accompany you throughout your work with the DBP 7 4 To view all the windows at one glance go to the More Windows menu and click All Here s a view of the int...

Page 53: ...chedule saving a schedule Password Creating a profile modifying a profile loading a profile Modifier More Windows Routing the Measurement Displaying the Measurement MPX Guard Dorrough meter phone rout...

Page 54: ...e parameters of the stereo coder Level Access to all the I O levels of the DBP Plug In Access to the various plug ins you have inserted in the DBP Diagram Via a diagram you can visualise assign and fi...

Page 55: ...DBP 7 4 Above the Band Process window of the DBP 7 4 To access the other functions scroll down the bar located to the left of these functions 5 The state bar Located just below the main window the st...

Page 56: ...Standby When the DBP 7 4 is in standby The setting of the standby threshold is accessible from the Key Tools window Overload If the input is overloaded there can be distortion so this label appears N...

Page 57: ...nry Curve Here you can immediately verify the density of your signal The MPX Guard Tag This tag is only active if the plug in has been loaded in the DBP 7 4 Refer to the section concerning this plug i...

Page 58: ...er Tag This tag is only active if the plug in has been loaded in the DBP 7 4 Visualisation of the average levels and monitors Loudness Quick Compare Tag Rapid switching between presets to compare and...

Page 59: ...RNING Do not make these modifications while the DBP is linked to a transmitter Make the settings with the TX1 2 unplugged or you could have over modulation Setting the TX level Click the Level icon in...

Page 60: ...our processor Setting the analogue and digital levels Still in the Level window adjust the analogue and digital I O levels to avoid any distortion of the sound before processing If your DBP is in a pr...

Page 61: ...ARNING as the product evolves there are new Factory Presets which will always refer to a version of layer even if we do all we can to ensure compatibility between the various layers The Preset explore...

Page 62: ...you load a Factory Preset in the list of User Presets it will keep its original name Once it is in the list of User Presets you can rename it as you want To do so proceed as follows Select the Preset...

Page 63: ...In this screen you can choose the type of input specific for a preset the cross fade as well as the pin on the local switch to be used to switch the DBP 7 4 to this preset This window also gives you...

Page 64: ...s not been used for some time or when there has been an electrical problem WARNING This process will cut the audio signal and will replace it by a sinus Don t start this ON AIR Start by clicking Calib...

Page 65: ...essor has lost its configuration then reload a calibration that you have saved on your hard disk or floppy When you calibrate your processor this file is automatically saved on the hard disk To calibr...

Page 66: ...s peak to peak You have to raise or drop the cursor until this value has been attained by your measurement equipment The second stage is similar except that the DBP 7 4 transmits a sinus signal at ins...

Page 67: ...urement equipment Both stages are similar They concern the analogue outputs of the DBP 7 4 You will note that our output is parameterised at 6 dB which corresponds to 4 40 Vpp Here again the aim is to...

Page 68: ...nsfer file to another processor Moreover the measurements may differ from one machine to another It is imperative then to do a full calibration on each unit NOTA BENE Decibels dB Volts Peak to Peak Vc...

Page 69: ...unctions for your processors If you have not ordered a plug in with your processor or you want to test one that you don t have all you have to is contact IDT Sound Processing Corporation for an evalua...

Page 70: ...t to you is specific to the serial number of your DVP Processor as well as to the Layers that it uses It will therefore work only on the machine that you specified when ordering the Plug In To install...

Page 71: ...the PI code 1 Click in the PI field 2 Use the Suppr and or back space to delete existing data 3 Enter the 4 digit PI number that was assigned to you by your regulatory body To enter the PS code 1 Cli...

Page 72: ...n above the Radio Text inscription 2 The red triangle is set in front of your choice indicating that it is implemented 3 Proceed the same way with the OFF button to de activate the transmission To ent...

Page 73: ...requency to modify this one displays in highlighting 2 Make a right click in the square field AF 1 3 The contextual menu represented below displays Contextual menu Alternative Frequencies 4 Select Mod...

Page 74: ...Make a right click in the square field AF 1 3 To the right of the field AF 2 two tinted noted triangles AF Order List 1 allow you to move the selected frequency AF Order command 4 Make a simple click...

Page 75: ...Frequencies of the list AF 2 1 Click the frequency to be deleted to delete a single frequency you have the possibility of selecting several frequencies to delete to do it to use the touch Ctrl or Shi...

Page 76: ...To commute from a list to the other one 1 By the software click on List 1 or List 2 List command 2 By the Local Switche refer you to the section II 1 Connexions and Local Switche 76...

Page 77: ...rocessor as well as to the Layers that it uses It will therefore work only on the machine that you specified when ordering the Plug In To install the Stereo Boost Plug In 1 Follow the instructions rec...

Page 78: ...icating that it is implemented 3 Proceed the same with OFF to deactivate the Stereo Boost The A mode amplifies the differences of level between both channels Left and right The B mode inserts a delay...

Page 79: ...usion 1 Set your mouse cursor over the magenta triangle located at the right hand side of the Diffusion scale 2 Drag the cursor up and down to set the desired value the value is displayed at the right...

Page 80: ...displays in real time the percentage of limitation of image width applied and thus the efficiency of the limiter Final Stereo Image This scale displays in real time the true width of the stereo image...

Page 81: ...well as to the Layers that it uses It will therefore work only on the machine that you specified when ordering the Plug In To install the MPX Guard Plug In 1 Follow the instructions received with this...

Page 82: ...ed value it is displayed at the right of the cursor in the above example 6 dB 3 Simply clicking on the red triangle has the focus activated allowing you to precisely define the value using the PgUp an...

Page 83: ...taneous power at the output of the DVP The numerical value is displayed above the scale The blue stroke moves in real time indicating the current value The peak point reached is displayed as a vertica...

Page 84: ...e monitor They give you important informations and a quick access to numerous features of the DVP See also MPX Guard Tag The MPX Guard tag is used to keep information on the MPX Guard plug in displaye...

Page 85: ...0 dB FS scale in one bar graph Besides to get more comfort in the visualisation each led represents one dB 1 You can control your peak level thanks to the led always located at the right of the others...

Page 86: ...ug In To install the Dorrough Loudness Monitor Plug In 1 Follow the instructions received with this Plug In to install it on your computer 2 Launch the DVP or DBP Control Software as usual 3 Click DVP...

Page 87: ...the Dorrough Loudness Monitor only on the left channel 1 Click on L of the Measure mode option 2 The switch is now pressed and red showing you that your action has been taken into account In this case...

Page 88: ...en taken into account In this case you visualise the modulation of the left right and left right modulations of the DVP s stereo coder Caution The loudness level and peak level you visualise are taken...

Page 89: ...n be set on all the visualisation modes from 14dB to 4dB FS Furthermore you have an instant access to the Dorrough Loudness Monitor via a tag window To display the Dorrough Loudness Monitor tag window...

Page 90: ...DBP 1 From the main screen point your cursor on PLUGINS thanks to the UP and DOWN keys 2 The Dorrough Loudness Monitor is now displayed You can control your loudness level thanks to the coloured leds...

Page 91: ...91 Simplified bloc diagram of the DBP 7 4...

Page 92: ...Examples of uses of the DBP 7 4 92...

Page 93: ...th Selectable 18 20 24 bits Jitter Less than 5 ns rms Status bits Output channel status can be generated Input User bits are optionally passed through the output Connector XLR male EMI suppressed Filt...

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