Manual for Minirator Pro Analog Audio Signal
Contents
1. Accuracy Reference voltage Meas range Accuracy 0 dBu no load typ 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 2 Ohm 25 V 35V 50V 70 7 V 100 V 140 V 200 V 0 to 54V 3 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 lt 90 rel humidity non condensing 147 x 74 x 41 mm 152 x 81 x 43 mm incl protective shock jacket 250 g 9 oz 310 g 11 oz Register as a customer with NTi Audio and benefit from the following possibilities Keep your products up to date Access free firmware and software updates Activate options Enable additional functions for your products Access premium content Access downloads information and specific support for your products Receive application and product news Sign in for the NTi Audio Newsletter Get fast worldwide support Register your products for fast support Confirm your ownership Allows us to contact you with important product notifica tions and provides a product record in case of loss or theft INTi AUDIO Further information Open the web page http my nti audio com You are prompted to login or create the M2. 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 Fo LUL ALAA dBu 1 400 kHz 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 E with the rotary wheel Oo Using the MODE symbol you can run the test signal in the following modes Once only Plays the test signal once Continuous Repeats the test signal after an adjustable LUL PARAM pause tPAUSE Output level The frequency display is for information only The current frequencies will be displayed here once the SWEEP test signal has been started You can configure the signal sequence here Test signals INTi AUDIO STOP 1 kHz f start A le The sweep recording starts as soon as the frequency drops from 1 kHz to fSTART The end of the sweep will be signaled by a falling fre quency 27 INTi Test signals AUDIO Using the MODE symbol you can run the test signal in the following modes HA COMF TG CHIRP S Once only Plays the test signal o
3. 1 oy STE COMFIG Power Sawe OFF 2 Backlight MANUAL Firmware 2 66 4 SrH b2P VPRSY Az 5 22 The Power Save mode switches the instrument off if no button has been pressed within an adjustable time period e Use the rotary wheel to select the Power Save function 2 e Confirm the selection with the Enter button e Turn the rotary wheel to set the desired time e Confirm the entry with the Enter button 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 e To do this select the Backlight 3 function with the rotary wheel e Press Enter Operation INTi AUDIO Display of the version number with the possibility of carrying out an update for the MR PRO 4 see chapter Updating the Firmware You can read out the instrument s serial number 5 from the bottom line 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 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 ro
4. NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe Tel 423 239 6060 Fax 423 239 6089 E Mail info nti audio com Web www nti audio com NTI Americas PO Box 131027 Tigard Oregon 97281 USA Tel 1 503 684 7050 Fax 1 503 684 7051 E Mail americas nti audio com or NTi Audio is an ISO 9001 2008 or certified company All rights reserved All information subject to change without notice Firmware MR2 2 14 MR PRO 2 14 Version 2 14 01 Sep 2012 NTI China Room 701 Ganglong Lisheng Mansion No 60 Suli Road 215168 Suzhou China Tel 86 512 6802 0075 Fax 86 512 6802 0097 E Mail china nti audio com Ministruments Minirator and Minilyzer are registered trademarks of NTi Audio IM XL2 Exel M4260 M2210 Acoustilyzer MiniSPL and MiniLINK are trademarks of NTi Audio NTI Japan Ryogokusakamoto Bld 1 8 4 Ryogoku 130 0026 Sumida Ku Tokyo Japan Tel 81 3 3634 6110 Fax 81 3 3634 6160 E Mail japan nti audio com Made in DJ Switzerland INTODUCTON eierens a 4 SCOPE of delivet serani heel nein S R 4 NOLES aeaaea a e e de anssaustaences 5 ACCESSONES arona chante A ent N 6 COMME CHONG kensa e a e conde oro 7 Buttons and operating elements 0 cceeeeeteeees 8 The screen display ccccceccceeeeeeeeeeeeceeeeeeeeeneeeeeeeenaes Power Supply ees Characteristics of the outputs Inserting the batteries sseseesseeeeereereerrres
5. Balanced XLR unbalanced RCA phantom power resistant 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 01 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 dBu dBV V dBFS in 1 digit steps in 1 digit steps e g 0 1 dBu 80 dBu to 8 dBu 80 dBu to 18 dBu 80 dBu to 0 dBu 80 dBu to 10 dBu 80 dBu to 2 dBu 80 dBu to 8 dBu 80 dBu to 6 dBu 80 dBu to 16 dBu 0 5 dB 0 2 dB 10 Hz to 12 kHz 0 1 dB 0 3 dB 12 kHz to 20 kHz Z 45 INTi Technical data AUDIO Accuracy 1kHz THD N 22 Hz to 22 kHz average 1 kHz typical Output Impedance 0 5 dB 90 dB 0 0032 8 dBu Noise floor typ 25 pV 200 Ohm balanced 0 2 dB 96 dB 0 0016 18 dBu Noise floor typ 15 uV 12 5 Ohm balanced Imax 10 mA Impedance Measurement Power Calculation Phantom Voltage USB Functionality Flash Memory Display Auto Power Off Batteries Battery Life Temperature Range Humidity Dimensions LxWxH Weight including Batteries 46 Method Meas range
6. an output signal Mute button lights up continuously Screen contrast poor MR PRO Wave files are not played back Mute button lights up continuously MR PRO indicates no impedance The lowest line is not displayed 44 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 Outputs Inputs Signal Wave Forms Wave File Format Frequency Setting Stepped Sweep Function Continuous Sweep Chirp Function Level Setting Output Level Ranges Flatness PAR peak to average ratio 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 gt 600 Ohm Technical data INTi AUDIO
7. 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 p 6 U 2 0 50 11 Oo XLR U2 1000 3 Ce Overview INTi AUDIO Both the RCA and the XLR have a balanced output impedance of only 12 5 ohms The level of the XLR output corresponds Commercially available XLR to RCA adapt closely to the set output voltage based upon the low 12 5 ohm ers short circuit the XLR Pins 1 and 3 Do output impedance of the generator not use such adapters with the Minirator They will reduce the signal quality thus use MR PRO ge i RCA the RCA output instead isl Ey 2 6 The MR PRO is designed for loads down to e i 600 Ohm Depending on the output level 0 52 and the output frequency however the U C XLR level is maintained even for lower load im u a r pedances 2 ee 1 lt 10mA For highest quality microphone level signals we recommend the Minirator 40dB Atten uator which is available as an accessory The maximum output current of the MR PRO is 10 mA If the It improves the signal to noise ratio for low connected load consumes more current the internal regulation level signals by 40 dB of the MR PRO reduces the output level This condition will be Order information indicated on the screen by the flashing output level display Minirator 40dB Adapter NTi Audio 60
8. the software MR_Up date which automatically checks the NTi Audio website for any new firmware available No further manual download is required e Follow the instructions shown in MR_Up date If the Minirator reacts unexpectedly a reset to the factory set tings might solve the problem e Switch the instrument off e Hold down the ESC button and simultaneously operate the On Off button 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 Trouble shooting 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 Lut_G 86 dBul The MR Update Software may not recognize the Minirator at PCs with Windows 7 installation e 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 atm6124 sys ATMEL AT91xxxxx Test Board e Complete the Minirator driver installation 43 INTi AUDIO Trouble shooting The Minirator does not gener Mute button blinks ate
9. 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 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 1x5 5x 9 5 mm plug e connection 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 AUDIO 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 The simultaneous use of both outputs could lead to a short circuit in one of the generator outputs in the connected instrument 7 3 1 1 PIN 1 2 PIN 2 3 PIN 3 Both the RCA and the XLR have a balanced output impedance The voltage at the MR2 XLR or RCA output is less than
10. 0 000 312 JINTi 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 e Do not mix used and new batteries e Open the battery cover e Insert three AA LR6 batteries with the same state of charge paying attention to the marking in the battery compart ment e Close the battery cover once the batteries have been in serted You have now successfully inserted the batteries Getting Started JINTi AUDIO With the MR PRO you can fit the supplied protective shock 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 e Push the upper end of the MR PRO into the protective housing e 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 e Please do not drop the instrument e Damage caused by dropping or impact is not covered by warranty JINTi Getting Started AUDIO To prevent you from accidentally dropping the Minirator a hand strap is supplied with the instrument You can also fit the hand strap when the protective shock jacket of the MR PRO has been fitted e Pull the hand strap through the opening e Pull the rear
11. ALAA dBu Hz oc ALi 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 ILT Generates an intermittent test signal You can determine the cycle times of the inter mittent signal with the CYC setting Q 3 3 3 seconds of signal and 3 seconds pause These settings have no effect in the continuous mode LUL Output level ee COMF IG HNOISE 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 JINTi AUDIO we COMF IG POLARITY LUL ALAA dBu ZA BA 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 info
12. RA KH2 oc AL4 2 39 pl OBA n Select the reference voltage of the distributed loudspeaker system 1 with the rotary wheel Connect the load between Pin 2 3 of the XLR The apparent power 2 in VA Volt Ampere and the phase information 3 is displayed Select PHS and press Enter The power factor PF cos phase angle is displayed Press Enter again 41 INTi AUDIO 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 e PC with Microsoft Windows 2000 or newer e USB termination e Connection to web 42 Instructions 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 e Switch your computer online e Run
13. 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 di Q The 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 13 2 k a 1k Balanced impedance R2 R3 a E 3 GS8 9kn a 41H n ita gt 25k Unbalanced impedance R3 gt R2 2 t3 H ti n 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 48V _ 2 x 6 8kQ 2 OQ J i j al XLR 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 aNTi AUDIO COHFIG GEHERATOR SINEWAVE LUL ALAA Bu TARA kHz oc ALAS 2 39 pl 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 displa
14. dium e Open one of the sub folders in the WAVE folder e Copy the desired files into the folder 34 O WAVE O FOLDER1 O FOLDER2 O ote e Signal1 wav e Signal1 wav e Signal2 wav e Signal2 wav LUL Output level The output level of this test signal is adjusted in dBF dB full scale or The MR PRO offers the following measurement functions Generator Cabletest Impedance Impedance Phantom Power Balance XLR cables Phantom Power Impedance Phase Apparent Power Phase Phantom Power Balance Fite eee OHF IG CABLETEST IMPEODAHCE SYSTEM EWAVE Meas functions MR PRO only aNTi AUDIO 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
15. ed 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 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 voltage
16. erreneere 14 Fitting the protective shock jacket MR PRO only 15 Attaching the hand strap 00 Connecting the Minirator Switching the Minirator on and Off cccceeecceeeeee 18 Navigation in the Menu Dal cceeeeeeeeeeeeeeteteeeeees 18 Selecting a test Signal ecececeeeeeeteeenseeeeee 19 Setting the parameters ascensa aiai 20 Setting the sensitivity of the rotary wheel 21 SYSTEM SCUINGS seica an e i 22 Configurations MR PRO only 0 cccscseeeeeeeeteeeeee 24 SMC aee EE N 26 Table of contents INTi SWE Diesre a E O 26 CG A EE E E E T E TA 28 Delay TeStcags pisen oenar E ANa 29 PiNK NOIS Ekisoain aineinaan aaa aa 30 White NOIS serieren aa eE A E A 31 Polan edoan Saet 31 Wave File Player MR PRO onlly ccceceeeseeeeeees 32 Impedance test in generator Mode cece 35 Balance display ccccccceceeecceeeeeeeeeeeeeeeeeteneeeeeeees 36 Measuring phantom power voltages cccceeeeeeeee XLR Cable teSt ccceeceeeeeeeecteeeeeetetteeees Impedance test Resetting to the factory SettingS ceeeeeeee 43 Reloading wav files MR PRO only cccseeceees 43 Behavior with low impedance loads 0 ee 43 PC recognizes Minirator as GPS Camera 0006 43 Faults and their Correction cc cceceeeeeeeeeeeeeeeeeeeees 44 REGIST At OM sist ceswaces nea elated 47 Warranty COndit
17. ions 0 ccccceceeeeeeeeeeteeeeeeeteteeeeeeenes 48 CalibratiOMinsscs isscaietnciess haven A 48 Declaration Of conformity cece ceeeeteeeeeeteeeeeeeeees 49 INTi Basics AUDIO 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 optimized 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 e Integrated measurement functions for impedance balance and phantom power voltages e Playback of WAV files e Cable tester e Impedance test of distributed 70V 100V speaker systems The following items are included with the respective model MR2 MR PRO MR2 Operating manual USB cable Hand strap 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 caus
18. lected 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 Fee C OHF TG SWEEP bo LUL ALAA dBu LARA kHz oc ALA JINTi 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 e Press the Level or Freq button e Turn the rotary wheel to set the parameter e Confirm the setting with the Enter button 20 e Turn the rotary wheel ele COMP IG HNOISE LUL ALAA dBu Hz oc ALA 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 INTi AUDIO You can set up the sensitivity step size of the rotary wheel To GEHERATOR COHFIG SINEWAVE do this proceed as follows e Select Level LUL or Frequency with the rotary wheel e Hold down the Sens button LuL BBB dB 1 06 kHz O SEHSE val We WiaOCT VAR e Turn the rotary wheel to set up the desired sensitivity e Release the Sens button to accept the desired sensitiv 1 ity 21 JINTi 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
19. nce Continuous Repeats the test signal after an adjustable LUL ALAR dB Hz pause tPAUSE oc ALA LUL Output level A Chirp is the name for a signal whose frequency continually changes over time also known as continuous sweep It is used f The frequency display is for information only The for the recording of frequency responses the measurement of current frequencies will be displayed here once the impulse responses and the acoustic assessment of rooms CHIRP test signal has been started PARAM You can configure the signal sequence here e Select the START J symbol with the rotary wheel 0 28 STOP f START f t cHIRP t LIN SCALE t scate 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 INTi AUDIO le COMF IG DELAYTEST LUL ALAA dBu Hz oc 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 INTi Test signals AUDIO ee COHF IG m PNOISE te arse c LUL
20. ns of the instrument For the calibration of your instrument kindly follow the service guidelines at www nti audio com service We the manufacturer NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe hereby declare that the Minirator MR2 and Minirator MR PRO products approved in 2007 comply with the following stan dards or other standard documents This declaration will become invalid if modifications to the in strument are carried out without the written approval of NTi Audio EMC 89 336 92 31 93 68 Harmonized standards EN 61326 1 Date 01 12 2006 Signature PA flecks Position Technical Director INTi AUDIO Further information Dispose of your instrument in accordance with the valid legal environmentally regula tions in your country K 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 Contact your respective authorities for waste disposal and fol low their regulations 49
21. or 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 ee COMF IG Coa cal PARAM STNEWAVE SHEEP Fisa uL ALAA dey 1 00A kHz LUL ALAA dBu LARA kHz oo ALA 2 3 pl FSBko 7 6 5 Menu bar 1 Test signal Battery 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 INTI Overview AUDIO oc ALAN 2 5 pL POA kO 1 Phantom voltage 2 Balance 3 Impedance In order to be always able to use the Minirator flexibly we rec ommend the use of batteries e 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 You can also connect the Minirator to a mains socket with a DC power supply unit
22. part of the hand strap through the loop of the front part e Pull the hand strap tight Getting Started JINTi AUDIO 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 INTi AUDIO Operation e To switch the Minirator on press the On Off button e 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 COHF IG IMPEODAHCE SSTEM EWAVE e 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 selecting test signals You can use either the direct buttons or the rotary wheel e Ensure that GENERATOR 1 is selected in the menu bar e Press the Wave button Select the desired test signal with the rotary wheel e Press Enter Operation JINTi AUDIO Ensure that GENERATOR 1 is se
23. rmation only The fre quency cannot be adjusted 31 INTi Test signals AUDIO se COMF IG Po MESSAGES FILE Soptinize G LUL 1B HdBF Hz oc 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 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 The factory default wav files are Ansagen Messages Signals 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 NTi Audio delivers a
24. s 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 INTI AUDIO 2 Overview of the Instrument Connections The Minirator has the following connections i RCA output unbalanced 2 XLR output balanced O DC power socket XLR input for the cable test MR PRO only USB connection Mini B 5 pin 7 INTi AUDIO 1 ESC 2 Rotary wheel 3 Enter Overview 4 Wave 1 2 4 5 Freq 6 Mute 7 On Off 8 7 6 Terminates an entry jumps to the 8 Sens top menu level or closes an open window Slow turning Precise setting of the value 9 Level Rapid turning Setting the value in larger steps Confirming a selection 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 f
25. s 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 instrument 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 IMPEDANCE COHFIG IMF 21 PHASE 1 TP POR APPAREHT FOMER 3 L2stkHz B E 3 pl PShkn LUL 2 ALA dBu oc 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 FIMPEQAHCE COHFIG w 866 9 26 LUL ALBA dBu LAR RKH2 oc ALA 2 E 3 pl OBA n e Connect the load between Pin 2 3 of the XLR e The absolute value of the impedance 1 the phase 2 and whether the load is inductive or capacitive 3 is displayed The output level and frequency may be adjusted as described earlier in this manual If the load is connected unbalanced e g between pin 1 2 a 2 or 3 is displayed below the IMP symbol Meas functions MR PRO only aNTi AUDIO ieee COMF IG REF LAB YL SB va ris 2673 LUL ALBA dBu LA
26. 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 Wave files for the MR PRO must fulfill the following require ments e 48 kHz sampling frequency e Mono Stereo e 16 Bit resolution If a wave file does not meet the require ments the playback stops and the Mute button lights up continuously red Wav files 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 e Macintosh computer with OSX e Connect the MR PRO to the computer via USB 33 INTi AUDIO Test signals e All the sub folders in the Wave folder now appear in the folder selection 1 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 me
27. tary wheel select CONFIG in the menu bar e Confirm with Enter GEHERATOR COHFIG STORE ST NEECELE e Select STORE and confirm with Enter He STORE CONFIG HESE Coantig_h VConfig_1 Contig_S Contig_6 Config_ 2 Contig_ VConfig_3 Config_ PT Config 4 Config 3 24 e Select a memory location with the rotary wheel and store your configuration by confirming the selection with Enter remember rename In order to figurations you con them easily may 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 e Use the rotary wheel to select CONFIG in the menu bar e Confirm with Enter LGEHERATOR COHFIG STORE w SINGHA p e Select Recall and confirm with Enter e Select the desired configuration in the Selection menu and confirm with Enter Operation JINTi AUDIO With the MR PRO you have the possibility of transferring stored configurations to another device e Connect your MR PRO to a computer via USB e Select the CONFIG sub folder e Copy this data to your computer e Connect another MR PRO to the computer via USB e Copy the previously copied data into the CONFIG sub folder by overwriting the data therein 25 INTi AUDIO Test signals GENERATOR SINEWAVE COHF IG LUL ALAA dBu LARA kHz oc ALA 2 3 pl FOAKO
28. y 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 The MR PRO supports a cable test function that quickly de 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 l R2 1K i l Rs 2x 38 e Select the Cable test function in the menu e Plug the XLR cable into the XLR output 1 e Plug the other end into the XLR input 2 ie COMP TG NO ALR CABLE Expected ka lkn na 2ko oc ALAY i COMP TG 2 3 CROSSED Ree AAR Ra LAK pc ALAY eee OHF IG ALA connected 1 1 oc ALAY 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 verification
29. y NTi Audio Ac count The web page My Products opens Select the product type and enter the serial number Confirm with Register Now the product is listed in the table My Products 47 INTi AUDIO Further information NTi Audio guarantees the function of the MR2 and MR PRO and their individual components for a period of one year from the date of sale During this period defective instruments will be repaired free of charge or will be replaced These guarantee provisions do not cover damage caused by accidents transportation incorrect use carelessness acces sories or the installation of any parts that were not delivered with the instrument the loss of parts connection to the mains voltage operation with non specified input voltages adapter types or incorrectly inserted batteries In particular NTi Audio accepts no responsibility for subsequent damage of any kind The warranty will be voided by the carrying out of repairs or service work by third parties who are not part of an approved NTi Audio Service Centre In the case of faulty functioning or damage please contact your local NTi Audio partner for assistance If your instrument needs to be returned for service kindly follow the service guidelines at www nti audio com service 48 The Minirator has been carefully tested during production and corresponds to the specifications listed in Technical Data NTi Audio recommends yearly calibratio
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