MINIRATOR MR2 / MR-PRO
Contents
1. Getting Started AUDIO 3 Getting Started Inserting the Batteries e Only use batteries from the same manu facturer e Replace the discharged batteries by new ones Do not mix used and new batteries Oo Open the battery cover Insert three AA LR6 batteries with the same state of charge paying attention to the marking in the battery compart ment Close the battery cover once the batteries have been in serted You have now successfully inserted the batteries Getting Started AUDIO Fitting the Protective Shock Jacket MR PRO only With the MR PRO you can fit the supplied protective shock e Push the lower end of your MR PRO into the lower end of jacket This will protect the instrument against light impacts the protective shock jacket without impairing its easy operation Push the upper end of the MR PRO into the protective housing You have now fitted the protective shock jacket Damage through impacts shocks The protective shock jacket shields your MR PRO against reasonable impacts that could occur in normal use e But do not intentionally subject the in strument to extreme stress Please do not drop the instrument e Damage caused by dropping or impact is not covered by warranty Getting Started AUDIO Attaching the To prevent you from accidentally dropping the Minirator ahand Pull the hand strap throug2. 40 7 Updating the 42 8 Tips and Troubleshooting 43 Resetting to the factory 5 43 Reloading wav files MR PRO 43 Behavior with low impedance loads 43 PC recognizes Minirator as GPS 43 Faults and their correction 44 9 Further Information 45 45 Warranty Conditions sssssssssss 46 Calibration 46 Service and 46 Declaration of conformity 47 10 Technical Data 48 Basics Introduction Thank you for purchasing the Minirator The Minirator is a pow erful audio generator offering a wide range of analog test sig nals for the calibration maintenance and repair of professional audio systems The rotary wheel combined with surrounding fast access func tion keys enables instant and intuitive operation without com promising fine adjustment capabilities While the MR2 has been optimi
3. U 2 0 50 1 u XLR 1000 L3 o MR PRO outputs Both the RCA and the XLR have a balanced output impedance of only 12 5 ohms The level of the XLR output corresponds closely to the set output voltage based upon the low 12 5 ohm output impedance of the generator MR PRO RCA I lt 10MA 630 2 m ue 0 50 11 U CO XLR us 6 30 8 See o Behavior with low impedance loads The maximum output current of the MR PRO is 10 mA If the connected load consumes more current the internal regulation of the MR PRO reduces the output level This condition will be indicated on the screen by the flashing output level display Lut ABA dBu Overview INTI AUDIO XLR short circuit between Pin 1 and 3 Commercially available XLR to RCA adapt ers short circuit the XLR Pins 1 and 3 Do not use such adapters with the Minirator They will reduce the signal quality thus use the RCA output instead The MR PRO is designed for loads down to 600 Ohm Depending on the output level and the output frequency however the level is maintained even for lower load im pedances Minirator 40dB Adapter For highest quality microphone level signals we recommend the Minirator 40dB Atten uator which is available as an accessory It improves the signal to noise ratio for low level signals by 40 dB Order information Minirator 40dB Adapter NTi Audio 600 000 312
4. DC power supply USB DC power supply USB XLR for cable test Sine Polarity Test Signal Delay Test Signal White Noise crest factor PAR 3 05 9 7 dB Pink Noise crest factor PAR 4 5 13 1 dB Gated Pink Noise 1 9 seconds Wave File playback MR PRO 48 kHz 16 Bit Mono Stereo 0 dBFS 18 dBu sine acc to EBU R68 10 Hz to 20 kHz in 1 digit steps 0 0196 freely selectable 1 1 1 3 1 6 1 12 octave selectable 0 5 to 5 seconds freely selectable Linear Logarithmic 1 to 99 seconds per cycle dBu dBV V in 1 digit steps 80 dBu to 8 dBu 80 dBu to 0 dBu 80 dBu to 2 dBu 80 dBu to 6 dBu 0 5 dB 0 5 dB dBu dBV V dBFS 96 in 1 digit steps e g 0 1 dBu 80 dBu to 18 dBu 80 dBu to 10 dBu 80 dBu to 8 dBu 80 dBu to 16 dBu 0 2 dB 10 Hz to 12 kHz 0 1 dB 0 3 dB 12 kHz to 20 kHz 0 2 dB PAR peak to average ratio THD N Output Impedance Impedance Measurement Power Calculation Phantom Voltage USB Functionality Flash Memory Display Auto Power Off Batteries Battery Life Temperature Range Humidity Protection Rating Dimensions LxWxH Weight including Batteries 22 Hz to 22 kHz average Q 1 kHz typical Method Measurement range Accuracy Reference voltage Measurement range Accuracy 0 dBu no load typical Technical Data INTi AUDIO 90 dB 0 003296 8 dBu Noise floor typ 25 uV
5. 600 000 334 This compact system case provides the professional trans port protection for work in the field It offers space for the handheld instruments cables and connectors Mains Power Adapter NTi Audio 600 000 333 Mains Power Adapter with removable plug types The Mains Power Adapter suits the typical power sockets in Australia China Europe Japan US and UK Minirator 40dB Adapter NTi Audio 600 000 312 Attenuator for high quality microphone level signals Cable Test Adapter NTi Audio 600 000 311 The Cable Test Adapter is used for single ended cable test ing By installing the Cable Test Adapter at the far end of the cable the MR PRO will be able to complete its cable test procedure and display the condition MR PRO 70V 100V Protection NTi Audio 600 000 313 Protects Minirator MR PRO against accidentally applied 70V 100V voltages during impedance or power testing at distributed speaker systems Calibration Certificate NTi Audio 600 000 018 Individual calibration certificate with serial number trace able according to the ISO IEC 17025 standard Calibration certificates for new products have to be ordered together with the product After the purchase we recommend the annual calibration of the instrument Overview AUDIO 2 Overview of the Instrument Connections The Minirator has the following connections 1 output unbalanced 2 XLR output ba
6. MINIRATOR MR2 MR PRO Contact NTi Audio at Headquarter 423 239 6060 154 info nti audio com Americas 1 503 684 7050 americas nti audio com China 86 512 6802 0075 china nti audio com Czech 420 2209 99992 czech nti audio com Japan 81 3 3634 6110 japan nti audio com South Korea 82 2 6404 4978 korea nti audio com United Kingdom 44 1 438 870632 uk nti audio com www nti audio com g NTi Audio is an ISO 9001 2008 57 certified company All rights reserved All information subject to change without notice Firmware MR2 2 15 MR PRO 2 15 Version 2 15 01 Apr 2014 Ministruments Minirator and Minilyzer are registered trademarks of NTi Audio TM XL2 Exel Acoustilyzer MiniSPL and MiniLINK are trademarks of NTi Audio Made in Switzerland Table of Contents 1 Minirator Basics 4 4 ocope of isis meet lee etat v cech tides 4 ecc C 5 6 2 Overview of the Instrument 7 Connections site petu 7 Buttons and operating 8 The Screen Display ctor ttc 9 POWER Supply on 11 Characteristics of the 12 3 Getting Started esses 14 Inserting the Batteries 14 Fitting the
7. Enter amp You have now loaded the desired configuration INTi AUDIO Operation Transferring configurations to another device MR PRO With the MR PRO you have the possibility of transferring stored configurations to another device Connect your MR PRO to a computer via USB 2 A removable memory drive will be indicated on the computer e Select the CONFIG sub folder gt You will see the stored configurations of your MR PRO Copy this data to your computer Connect another MR PRO to the computer via USB Copy the previously copied data into the CONFIG sub folder by overwriting the data therein gt You have now transferred configurations from your MR PRO to another MR PRO 25 INTi AUDIO Test Signals GENERATOR SINEHRVE C HFI LUL ALAA dBu LARA KHS oc ALAN 2 3 2b5Hkn Pure sinusoidal signals are required for almost every audio measurement The Minirator provides a wide and adjustable output level range and selectable output frequencies LUL Output level f Output frequency 26 COHFIG PARAM c LUL ALAA dBu 1 nBnBkHz oc ALA GEHERATOR SHEEP Sweep signals with a resolution of up to 1 12 octave can be generated over a freely selectable frequency range An audio analyzer like the Minilyzer from NTi Audio can automatically trigger to this signal sequence to measure the frequency re sponse e Select the START symbol 3 with the ro
8. 200 Ohm balanced 96 dB 0 001696 18 dBu Noise floor typ 15 uV 12 5 Ohm balanced Imax 10 mA Absolute value Z 4 Ohm to 50 kOhm balanced 2 Ohm to 25 kOhm unbalanced f 30 Hz to 10 kHz Sine Level from 20 to 18 dBu 10 or 20hm whatever is higher 25 V 35 V 50 V 70 7 V 100 V 140 V 200 V Oto 54V x3 96 or 0 5V Firmware update Firmware update Mass Storage Device 512 MByte for storing wave files and configurations Graphical with back light 10 30 60 minutes or OFF 3 x AA Alkaline dry cells or rechargeable equivalents 14 hours 8 hours 0 to 45 C 32 to 113 F 90 relative humidity non condensing IP51 147 x 74 x 41 mm 152x 81 x 43 mm incl protective shock jacket 250g 9 oz 310 g 11 oz 49 VVvO Pi 0002
9. Measurement Functions of the MR PRO The MR PRO offers the following measurement functions Menu Generator Cabletest Impedance Measurements Impedance Phantom Power Balance XLR cables Phantom Power Impedance Phase Apparent Power 4 Phase Phantom Power Balance Eja CABLETEST IMPEDANCE ST STEH EHRVE Meas Functions MR PRO only aNTi AUDIO Impedance Test in Generator Mode The MR PRO measures phantom voltages and displays imped ances and the impedance balance in the SINEWAVE operating mode Using the SINEWAVE sinusoidal test signal the MR PRO measures the load connected to the output between PIN 2 and 3 RL R2 R3 The measured values of R2 and R3 will be displayed by selecting RL with the rotary wheel If only R2 or R3 can be measured RL is replaced by R2 or R3 accordingly In the case of balanced connec tions XLR interference radiated onto the receiver side will be eliminated For this to work there must be a balanced impedance distribution on both signal lines In the case of unbalanced impedance dis tribution signal interference could occur The MR PRO allows you to test the connec tions for balance 35 aINTi Meas Functions MR PRO only 36 AUDIO RCA The impedance and balance measurement can only be carried out down to a defined minimum level If the measurement cannot be carried out the display shows 8 Q T
10. Protective Shock Jacket MR PRO only 15 Attaching the Hand 16 Connecting the Minirator 17 4 Operation uii inrer rx aaa aaa 18 Switching the Minirator on and 18 Navigation in the Menu 18 Selecting a Test 19 Setting the Parameters 20 Setting the Sensitivity of the Rotary Wheel 21 SYSTEM Settln is usas terere et Ute ex 22 Configurations MR PRO 24 5 Test Signal S siriana onanie ie der nerve 26 26 SWC CD 26 INTi AUDIO Table of contents i 28 BISEMAIIS 29 minec EE 30 White RR 31 Polarity 31 Wave File Player MR PRO 32 6 The Measurement Functions of the MR PRO 35 Impedance Test in Generator 35 Balance Display ien denuo 36 Measuring Phantom Power 37 XER Cable lestie e iret ttes 38 Impedance
11. atm6124 sys ATMEL AT91xxxxx Test Board Complete the Minirator driver installation 43 INTi AUDIO The Minirator does not gener ate an output signal Screen contrast poor MR PRO Wave files are not played back MR PRO indicates no impedance 44 Troubleshooting Mute button blinks Mute button lights up continuously Mute button lights up continuously The lowest line is not displayed You have switched the instrument to Mute You have called up the Pink Noise PNoise test signal or you are in the Pause cycle of the Chirp test signal Non supported Wave format Cable not plugged in correct ly Contrast needs to be adjusted Non supported Wave format Output level too low Incorrect test signal Press the Mute button Wait until the pause has ended Press the Start button Load a supported Wav format Plug in the cable correctly Press ESC and operate the rotary switch to set the contrast Load a supported Wave for mat Increase the output level Change to the SINEWAVE test signal 9 Further Information My NTi Audio Register your instruments at My NTi Audio and benefit from the following possibilities Free updates for your instruments e Activation of optional product functions e Premium access to downloads e Receive application and product news e Faster worldwide support e Tracing support in case of loss or thef
12. symbol 2 Start Stop for certain test If the battery symbol lights up signals the batteries are almost com 3 Setting up the parameters pletely discharged and must 4 Single continuous mode be replaced Display of the readings MR PRO Settings for signal generation for certain test signals Output frequency Units for the output level Output level Overview AUDIO Display of the measured values MR PRO RL 5BkO O Phantom voltage Balance Impedance Power Supply Battery operation In order to be always able to use the Minirator flexibly we rec ommend the use of batteries Only use 3x AA LR6 batteries e The battery consumption increases at higher level setting as well is based on the connected load e During operation the battery tempera ture may increase noticeably This is not a defect e The instrument can also be used with re chargeable batteries Operation using the mains power supply You can also connect the Minirator to a mains socket with a DC power supply unit which is available for order at NTi Au dio We recommend remaining the batteries inside the instru ment Overview INTI AUDIO We recommend using the NTi Audio mains power adapter This is a switch ing power supply and leads to increased noise at the unbalanced output connector Alternatively you may utilize a linear power supply adapter with EU connector for unbal
13. anced signal applications NTi Audio 600 000 305 In case you want to make use of a different DC power supply unit you must observe the following specifications e electrically isolated non earthed linear DC power supply unit e 2 1 x 5 5 x 9 5 mm plug e connection 9 e Voltage from 5 to 9 volts and a current of at least 500 mA Damage caused by using an inappropriate external DC supply is not covered by war ranty INTi Overview Characteristics of the Outputs The Minirator has two outputs that are wired in parallel An unbalanced RCA output and a balanced non earthed XLR output Both outputs are resistant to externally applied phan tom power Wherever possible always use balanced XLR connections as these have much better immunity to interference than unbal anced connections Do not use both outputs at the same time The simultaneous use of both outputs could lead to a short circuit in one of the generator outputs in the connected instrument Allocation of the XLR output D PNI 2 PIN2 3 MR2 outputs Both the RCA and the XLR have a balanced output impedance of 200 Ohm The voltage at the MR2 XLR or RCA output is less than the set voltage U with low im pedance loads Example A balanced 200 Ohm load impedance match ing the 200 ohm output impedance will re sult in the expected output drop of 6 dB MR2 RCA 1000 2
14. e tects damaged XLR cables The cable test is based on an impedance measurement In or der to indicate a correctly wired XLR cable the test routine of the MR PRO assumes the following impedances on the out put MR PRO MR PRO or adapter 2x 38 e Select the Cable test function in the menu e Plug the XLR cable into the XLR output 1 Plug the other end into the XLR input 2 2823 COMP TG NO ALR CABLE Expected ka Ikn 2ko BB 2823 COME TG 2 3 LROSSED Ree Ak BB elie SLA connected 1 1 pr BB The cable has not been plugged in correctly Check the cable connection The tested cable is defective the pins 2 and 3 are crossed Other error indications may ap pear depending on the cables fault The tested cable is OK Meas Functions MR PRO only aNTi AUDIO For long cables already in place NTi Audio offers an optional adapter named Cable Test Plug Plug one end of the cable into the Cable Test Plug and the other end of the cable into the MR PRO Order information Cable Test Plug NTi Audio 600 000 311 39 aINTi Meas Functions MR PRO only AUDIO The impedance test supports the verifications of distributed loudspeaker installations and shows detailed information of the connected load Connect any unpowered load between Pin 2 and 3 of the XLR output for best performance Never connect the i
15. elease the Sens button to accept the desired sensitiv 1 ity 21 JINTiI Operation AUDIO You can adjust various system settings of your instrument To do this switch to System 1 in the menu bar using the rotary wheel and confirm with Enter The possible system settings are displayed 1 ease COMFIG Power Squse OFF 2 Backlight MANUAL Firmware V200 SrH G2P VPRSY R2 x C 22 The Power Save mode switches the instrument off if no button has been pressed within an adjustable time period Use the rotary wheel to select the Power Save function 2 e Confirm the selection with the Enter button Turn the rotary wheel to set the desired time e Confirm the entry with the Enter button Backlight You can choose between Auto and Manual Auto The backlight will be switched on automatically during operation and will be switched off again after a period of time Manual Press the On Off button to switch the back ground lighting on and off To do this select the Backlight function with the rotary wheel Press Enter The display now changes between Auto and Manual INTi AUDIO Operation Firmware Display of the version number with the possibility of carrying out an update for the MR PRO see chapter Updating the Firmware Display of the serial number You can read out the instrument s serial number 6 from the bottom line Setting the co
16. es can be converted to the above requirements by a free software available for download at www nti audio com To load WAV files you will need a computer with the following minimum specifications e PC with Windows 98SE Macintosh computer with OSX Connect the MR PRO to the computer via USB The MR PRO appears on your computer as a removable data medium 33 AUDIO Test Signals e All the sub folders in the Wave folder now appear in the folder selection Add additional sub folders to this folder level as required e f necessary you can make use of the other standard possibilities of a remov able data medium For example you can copy wav files from the MR PRO onto your computer or delete unnecessary files e The absolute level generated at the out put depends on the modulation as well as the signal form of the data present in the WAV file e Example A fully modulated sinusoidal signal played back at 0 dBF generates an absolute level of 18 dBu at the output e Open the WAVE sub folder on the removable medium e Open one of the sub folders in the WAVE folder e Copy the desired files into the folder You have now loaded your Wave files 34 FJ WAVE d EJ FOLDER1 FOLDER2 FJ e e Signal1 wav e Signal1 wav Signal2 wav Signal2 wav Parameters LUL Output level The output level of this test signal is adjusted in dBF dB full scale or 6 The
17. etween pin 1 2 Select PHS and press Enter 2 or 3 is displayed below the IMP symbol e The power factor PF cos phase angle is displayed e Press Enter again 41 INTi AUDIO Updating the Firmware 7 Updating the Firmware You can find the installed firmware version of your instrument as follows e Select System in the menu bar e Confirm the selection with the Enter button The firmware version of the instrument will be displayed The firmware update is carried out by connecting your Minira tor to a computer via USB and running the PC application software MR Update In order to update the firmware you will need a computer with the following mini mum specifications PC with Microsoft Windows 2000 or newer e USB termination Connection to web 42 Instructions 1 When updating your Minirator for the first time e Register your instrument at http my nti audio com see chapter Further information After the registration you will get the following details at the support page Firmware update instruction Overview of new firmware features e Download the software MR Up date at the Minirator support page e Install and run MR Up date e Follow the instructions shown in MR Up date 2 If you have already updated your Minirator before e Switch your computer online e Run the software MR_Up date which automatically checks the NTi A
18. h the opening strap is supplied with the instrument You can also fit the hand Pull the rear part of the hand strap through the loop of the strap when the protective shock jacket of the MR PRO has front part been fitted e Pull the hand strap tight Getting Started AUDIO Connecting the Minirator XLR connection RCA connection e Connect the Minirator to your audio device using an XLR Connect the Minirator to the input of the unit to be tested cable Note that the locking pin of the plug must be located using a RCA cable on the lower side of the instrument You have now connected the Minirator 2 You have now connected the Minirator INTi AUDIO Operation e To switch the Minirator on press the On Off button To switch the Minirator off press the On Off button and hold it down for one second The menu bar is divided into two parts On the left hand side you can choose between the Generator Cable test MR PRO only Impedance MR PRO only and System functions C HFIG IMPEDRHCE SYSTEM EHAVE To do this select the left side of the menu bar with the rotary wheel and confirm with Enter GEHERATOR CABLETEST e Select the desired function with the rotary wheel e Confirm the selection with Enter You can save and call up configurations on the right hand side of the menu bar see the Configurations chapter MR PRO only You have two choices for se
19. he balance display allows localizing a number of typical faults such as short circuits and defective cables In the case of an unbalanced impedance distribution the dis play arrow points to the pin with the higher impedance a 183 2 ki a 18 7 kt Balanced impedance R2 R3 a i 3 35 3 2 41H Unbalanced impedance gt R2 a i3 H 1 o Unbalanced load relationships can be analyzed further by se lecting the impedance display with the rotary wheel If the im pedance cannot be measured the display shows instead of the measurement value The phantom voltage is necessary in connection with capaci tor microphones in order to operate the impedance converter located in the microphone as well as for some active direct boxes MR PRO Mischpult The most common phantom voltage is 48 V and lies on both Pin 2 and Pin 3 with balanced impedances see diagram Meas Functions MR PRO only AUDIO COMF IG SINEHRVE LUL ALAA dBu 1 nBnBkHz ALA 2 3 mL FSA Unequal phantom voltages on Pin2 and Pin3 of the XLR cable indicate an error and will be displayed by the blinking of the phantom voltage display DC You can localize the faulty voltage source by selecting the DC function 1 with the rotary wheel 37 aINTi Meas Functions MR PRO only AUDIO XLR C Cable Test The MR PRO supports a cable test function that quickly d
20. ing wav files or add new ones 32 Possible applications include for example Identification generator in the broadcasting sector Musical signals for the assessment of PA systems Playing back complex test signals Select the Symbol folder 1 with the rotary wheel Confirm with Enter Select the desired folder with the rotary wheel Confirm with Enter Use the rotary wheel to select the Symbol file 2 Confirm with Enter Select the desired WAV file with the rotary wheel Confirm with Enter Default wav files e The factory default wav files are e Ansagen Messages e Signals e Sounds Anpassen German Testsequenz German Adjust English Occupied English Test sequence English NTi Audio STI PA Drum1 Drums2 Hihat Sax Synth1 Further customized wav files are available for download on the Minirator support page at http my nti audio com Copyright NTi Audio delivers a set of demonstration wave files with the MR PRO These wave files may only be replayed with an NTi Audio instrument MR PRO Any further usage is forbidden Test Signals INTi AUDIO Loading your own wav files Wave files for the MR PRO must fulfill the following require ments e 48 kHz sampling frequency Mono Stereo e 16 resoluti on If a wave file does not meet the require ments the playback stops and the Mute button lights up continuously red Wav fil
21. lanced 3 DC power socket 4 XLR input for the cable test MR PRO only 5 USB connection Mini B 5 pin 7 aNTi AUDIO Overview Buttons and operating elements 1 ESC Rotary wheel 3 Enter Terminates an entry jumps to the top menu level or closes an open window Slow turning Precise setting of the value Rapid turning Setting the value in larger steps Confirming a selection 7 On Off 8 Sens 9 Level Selection of the test signal Setting the output frequency Direct jump to the PARAM menu with the SWEEP and CHIRP test signals Switches off the output signal Mute is indicated at the lower right corner of the display and a flashing mute button The button lights up continually during the pauses of the PNoise and Chirp signal waveforms Switches the instrument off if held down for one second Switches the back lighting on and off Changes the sensitivity steps of the frequen cy and level settings Setting the output level You can set up the output signal in the following units dBV dBu V With the MR PRO dBF dB re ferred to Full Scale and units are available when playing back Wave files INTi AUDIO Overview COMF IG PARAM STNEWAVE SHEEP bia LuL ALAA dBu 1 8BBEkHz LUL ALAA LARA kHz pc ALA a8 Z 3 mL b5 kuo 7 6 5 Menu bar 1 Test signal Battery
22. lecting test signals You can use either the direct buttons or the rotary wheel e Ensure that GENERATOR 1 is selected in the menu bar Press the Wave button Select the desired test signal with the rotary wheel e Press Enter Operation ii NTI AUDIO Ensure that GENERATOR 1 is selected in the menu bar Select WAV 2 with the rotary wheel Press Enter Select the desired test signal with the rotary wheel Press Enter 1 C OHF IG SWEEP bo LUL ALAA dBu LARA KHS ALA JINTiI Operation AUDIO You have two possibilities for setting up the parameters for the test signals You can use either the direct buttons or the rotary wheel Press the Level or Freq button Turn the rotary wheel to set the parameter e Confirm the setting with the Enter button 20 e Turn the rotary wheel COMP IG NNOISE LUL ALAA dBu Hz oc ALAN e Confirm your choice with the Enter button e Turn the rotary wheel to set the parameter e Confirm the setting with the Enter button Operation AUDIO You can set up the sensitivity step size of the rotary wheel GEHERATOR COHFIG SINEHRVE do this proceed as follows e Select Level LUL or Frequency with the rotary wheel e Hold down the Sens button ABB dBu aei nBkHz CHSEHSE val We 1 e Turn the rotary wheel to set up the desired sensitivity e R
23. legal rights you have at your sole discretion 46 Calibration Certificate Your NTi Audio instrument has been carefully tested during production and corresponds to the specifications listed in Technical Data Calibration certificates for new products are optional NTi Audio recommends annual calibration of the products af ter the purchase The calibration provides documented and traceable measurement accuracy and confirms that your NTi Audio product meets or exceeds the published specifica tions The calibration and adjustment procedures follow the documentation and traceability requirements of the standard EN ISO IEC 17025 For calibrations kindly follow the service guidelines at www nti audio com service CA ian ann Darana O NCG anc RADAITS oervice NepalfS If your product is not functioning correctly or is damaged please contact the local NTi Audio partner for assistance If the product needs to be returned for service kindly follow the service guidelines at www nti audio com service Declaration of conformity CE FCC Compliance Statement We the manufacturer NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe CE hereby declare that the Minirator MR2 and Minirator MR PRO products approved in 2007 comply with the following stan dards or other standard documents e EMC 2004 108 EG e Harmonized standards EN 61326 1 e Explosive atmospheres ATEX 94 9 EG This declaration
24. n intermittent test signal You can determine the cycle times of the inter mittent signal with the CYC setting 2 3 3 2 3 seconds of signal and 3 seconds pause These settings have no effect in the continuous mode LUL Output level OHF IG NOISE LUL ALAA dBu Hz oc ALA The White Noise test signal has a high spectral density Gaussian amplitude distribution and an infinite period gt 100 years White Noise is used for all measurements with FFT analyzers and has a constant signal power per Hertz and a 20 kHz bandwidth LUL Output level Test Signals AUDIO COMP IG POLARITY LUL ALAA dBu 20 08 Hz oc ALA The sawtooth test signal is ideally suited for checking the polar ity of loudspeakers The NTi Audio audio analyzers detect this signal and determine the polarity LUL Output level f The frequency display is for information only The fre quency cannot be adjusted 31 iTi Test Signals AUDIO OHF IG E MESSAGES C FILE amp oetinize LuL 1B H dBF Hz ALA You can play back your own test sequences with the MR PRO The test sequences will be repeated automatically and without pauses For a better overview Wave files are organized in sub folders The MR PRO is already equipped with a series of demo se quences in the WAV file format You can create a link to a com puter at any time via the USB interface and can exchange exist
25. nfigure the signal sequence here f f START STOP t CHIRP t LIN SCALE LOG Fading in and out of any Chirp signal gen erates spurious frequency components leading to ripple in the frequency response The Chirp sequences of the MR PRO MR2 are optimized for ripple of 0 2 dB maxi mum Parameter combinations resulting higher ripple are automatically corrected during in put Test Signals iTi AUDIO COMF IG DELRYTEST LUL ALAA dBu Hz pc ALA The Delay Test signal is a specially configured Chirp signal It enables to setup delay lines in combination with the NTi Audio Acoustic Analyzers You can find further information in the ap plication notes and user manuals of acoustic analyzers LUL Output level 29 Test Signals AUDIO COMF IG PNOISE tre 3s LUL ALAA dBu Hz oc 8 1 The Pink Noise test signal has a high spectral density an infinite period gt 100 years and 20 kHz bandwidth Pink Noise is used as a reference signal for the layout of loudspeaker systems PA systems whereby a Real Time Analyzer RTA is used to execute the required measurements When operated in the intermittent mode Pink Noise forms the basis for reverberation time measurements 30 You can choose between the following test signal modes with the MOD setting 1 CONT Generates a continuous test signal Generates a
26. nstrument to a power output or any activated distribution system Protects the Minirator MR PRO against ac cidentally applied 70V 100V voltages during impedance or power testing at distributed speaker systems Order information MR PRO 70 100V Protection NTi Audio 600 000 313 40 IHMPEDRHCE COHFIG IMF IZI PHASE JE 1 POR RPPRREHT 7 l 23 kHz B E 3 mL SBR LuL zB B dBu ALA In the mode Z Phase 1 the absolute value of the imped ance and the phase is shown Based on the measured impedance the apparent power 2 which the load would sink when driven with a defined refer ence voltage is calculated and displayed Meas Functions MR PRO only aNTi AUDIO IHMPEDRHCE COHFIG Hula M CHF IG gt 888 Q 26 A P12 Sve nc pee LUL 8 00 dBu 1 ARR KH LUL 8 00 dBu L ARR KH ALA z2 3 OBA oc 2 3 OBA e Connect the load between Pin 2 3 of the XLR e Select the reference voltage of the distributed loudspeaker e The absolute value of the impedance 1 the phase 2 and system 1 with the rotary wheel whether the load is inductive or capacitive 3 is displayed Connect the load between Pin 2 3 of the XLR The apparent power 2 in VA Volt Ampere and the phase The output level and frequency may be adjusted as described information 3 is displayed earlier in this manual If the load is connected unbalanced e g b
27. ntrast Changing the contrast of the screen display To do this proceed as follows e Hold down the ESC button and turn the rotary wheel until the desired contrast is obtained gt You have now changed the contrast of the screen display 23 INTi AUDIO Operation With the MR PRO you can store your current instrument settings as configurations and can call these up again at a later date 10 configuration storage locations are available to you e Using the rotary wheel select CONFIG in the menu bar e Confirm with Enter GEHERRTOE COHFTG STORE SINBCLUE e Select STORE and confirm with Enter SE STORE CONFIG ES Lonfig H VContig_1 Contig_S Contig_6 Contig 2 Contig_ llCanfig 3 Config_ E Config 4 Config 3 24 Select a memory location with the rotary wheel and store your configuration by confirming the selection with Enter In order to easily remember con figurations you may rename them For altering the file names connect the MR PRO to a computer via USB and rename the files in the CONFIG folder Only the first 10 configurations are shown in the display Calling up configurations Use the rotary wheel to select CONFIG in the menu bar e Confirm with Enter The following menu is opened GEHERRTOR COHFTG STORE w SINGHA e Select Recall and confirm with Enter e Select the desired configuration in the Selection menu and confirm with
28. t Calibration support Further information INTi AUDIO How to Register Open the web page http my nti audio com You are prompted to login or create your My NTi Audio account The web page My NTi Audio Products opens Select the product type and enter the serial number Confirm with Register Now your product is listed in the table My Products amp Congratulations your NTi Audio product is registered 45 INTi Further Information AUDIO V X CAnAinARSG VVarranty Conaitions International warranty NTi Audio guarantees the function of its products and the in dividual components for a period of one year from the date of sale During this period defective products will either be repaired free of charge or replaced Limitations These guarantee provisions do not cover damage caused by ac cidents transportation incorrect use carelessness non origi nal accessories the loss of parts operation with non specified input voltages adapter types or incorrectly inserted batteries NTi Audio accepts no responsibility for subsequent damage of any kind The warranty will be voided by carrying out repairs or services by third parties who are not part of an approved NTi Audio Service Centre Statutory Rights Consumers may have legal statutory rights under applicable national laws relating to the sale of consumer products This warranty does not affect your statutory rights You may assert any
29. tary wheel Sweep Signal modes Using the MODE symbol you can run the test signal in the following modes Once only Plays the test signal once Repeats the test signal after an adjustable pause tPAUSE Continuous ch Parameters LUL Output level f The frequency display is for information only The current frequencies will be displayed here once the SWEEP test signal has been started PARAM You can configure the signal sequence here INTi AUDIO Test Signals 1 kHz f START 71 A The sweep recording starts as soon as the frequency drops from 1 kHz to fSTART B The end of the sweep will be signaled by a falling fre quency 27 Test Signals AUDIO COMF IG CHIRP 5 5 LUL ALAA dBu Hz oc ALA A Chirp is the name for a signal whose frequency continually changes over time also known as continuous sweep It is used for the recording of frequency responses the measurement of impulse responses and the acoustic assessment of rooms e Select the START 3 symbol with the rotary wheel 28 Using the MODE symbol you can run the test signal in the following modes Once only 4 Plays the test signal once Continuous ch Repeats the test signal after an adjustable pause tPAUSE Output level The frequency display is for information only The current frequencies will be displayed here once the CHIRP test signal has been started You can co
30. udio website for any new firmware available No further manual download is required e Follow the instructions shown in MR Up date You have updated the Minirator firmware 8 Tips and Troubleshooting Resetting to the factory settings If the Minirator reacts unexpectedly a reset to the factory set tings might solve the problem e Switch the instrument off Hold down the ESC button and simultaneously operate the On Off button The confirmation of the reset is displayed on the screen Reloading wav files MR PRO only You can reload the wave files of the MR PRO that were in stalled in the factory The files are available at the Minirator support page http my nti audio com INTi AUDIO Troubleshooting Behavior with low impedance loads The maximum output current of the MR PRO is 10 mA If the connected load consumes more current the internal regulation of the MR PRO reduces the output level This condition will be indicated on the screen by the blinking of the output level display Lun 8 dBu PC recognizes Minirator as GPS Camera The MR Update Software may not recognize the Minirator at PCs with Windows 7 installation Open the device manager e Select with the right mouse button the GPS Camera driver select Properties gt Driver gt Update Driver e Select Search the compute for driver software e Select Select driver from list e Select Minirator driver
31. will become invalid if modifications to the in strument are carried out without the written approval of NTi Audio Date 01 12 2006 Signature Position Technical Director INTi AUDIO Further Information Information for disposal and recycling K Regulations for the European Union and other European countries with corresponding laws The instrument must not be disposed of in the household gar bage At the end of its service life bring the instrument to a collecting point for electrical recycling in accordance with the legal regulations Dispose of your instrument in accordance with the valid legal environmentally regula tions in your country Other countries outside the EU Contact your respective authorities for waste disposal and fol low their regulations 47 INTi AUDIO Technical Data 10 Technical Data Minirator Outputs Inputs Signal Wave Forms Wave File Format Frequency Setting Stepped Sweep Function Continuous Sweep Chirp Function Level Setting Output Level Ranges Flatness Accuracy 1kHz 48 Sampling frequency Resolution Output level Range Increment Accuracy Frequency range Increment Sweep speed Frequency range Increment Chirp speed Units Increment Sine Sweep Chirp White Noise Pink Noise Polarity Delay Test RL 2 600 Ohm MR2 MR PRO Balanced XLR unbalanced RCA phantom power resistant
32. zed for Value at a most attrac tive price the MR PRO has been developed with additional in novative functionality for even more demanding applications The MR PRO is also equipped with the following functions ntegrated measurement functions for impedance balance and phantom power voltages e Playback of WAV files e Cable tester mpedance test of distributed 70V 100V speaker systems Scope of De The following items are included with the respective model MR2 e MR2 Operating manual USB cable Hand strap MR PRO e MR PRO Protective shock jacket Operating manual USB cable Hand strap Notes Basics INTi AUDIO Danger of electric shock Never connect the instrument to a power output Non compliance could result in damage to persons or property that is not covered by the warranty Damage caused by opening the instru ment Never open the instrument The instrument can be damaged if the hous ing is opened and your warranty will be in valid Damage through damp Do not use the instrument in damp environ ments The instrument can be permanently dam aged by the penetration of water INTi Basics AUDIO Accessories available for the MR2 MR PRO Pouch MR2 MR PRO NTi Audio 600 000 302 The soft pouch protects the Minirator against shock and dust and comes with a convenient belt clip Exel System Case NTi Audio
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