Minilyzer ML1 User Manual
Contents
1. and the RCA input at the same time Music Detection Automatic gain control is applied to the input signal before being analyzed and made audible from the monitor jack In this mode the monitor signal behaves similar like a compressor output whereby the user hears an almost constant sound pressure level For input levels lower 20 dBu the gain is set to 20 dB NOTE The automatic music detection is only available in the measurement functions LEVEL RMS LEVEL REL THD N POLARITY BALANCE SWEEP and SCOPE 17 Measurement Functions 3 MEASUREMENT FUNCTIONS Level RMS LEVEL RMS reflects the absolute level of the line input signal Measurement Active Function Filter LEWEL FLAT _ SETUF HEH Signal Frequency Bienes Bargraph Level RMS Zoom Result and Mode Unit Bargraph Zoom nee Control ey Bargraph with Scaling Information Fig 3 1 Level RMS Meter Panel To enter the LEVEL RMS mode select LEVEL gt RMS in the measurement functions submenu Signal Balance This indicates the deviation from level match of the incoming balanced signal between pin 2 and pin 3 in percent The position of the arrow indicates the following e Arrow in center the input signal is balanced e Arrow out of center linear indication of a balancing problem e g arrow moves left nearer to the number 2 shows the signal level on pin 2 is higher than on pin 3 Left or right end the signal balance error is 33 or higher 33 eq2. unit to the status in which it was opened In the SETUP mode the executed changes are saved and the previous measurement mode is recalled In other terms by pressing the ESC key maximum twice the unit is reset to the last active status and the cursor returns to its default position 11 Basic Operation Enter Cursor Control The cursor is the core control element of ML1 providing access to its menus and to the current instrument settings The cursor position is represented by an inverted display white on black of the field holding the cursor The cursor may be moved from menu to menu by using the four gray arrow keys gt t and amp The enter key has to be pressed to enter a submenu or to confirm the current selection To modify the menu status execute the following procedure e Move the cursor to the field of interest and press the enter key Scroll to the required menu option by using the arrow keys Confirm your selection by pressing the enter key Please note that in certain selection modes the measurement result will be updated with the new selection even before the enter key has been pressed for confirmation For instance if a new level unit is selected but not yet confirmed the display will instantly update to the newly selected unit even before the enter key has been pressed for confirmation In case of an unwanted change of any menu the old status may be re established by pressing the ESC k
3. Fig 4 8 THD N Screen 44 Measurement Functions FSweep Frequency Sweep recording Please refer to the earlier pages for more details The frequency tracking will not work if mains frequency components dominate the input signal Activating the HP400 filter will attenuate all main frequency components and a frequency recording is possible 1 3 Octave 1 3rd octave spectrum analyzer This function shows the spectrum of the input signal in 1 3 octave bands The ML1 input ranging is not necessary in the induction loop mode and therefore not included Please refer to the earlier pages for more details Scope Time domain of the input signal in A m Please refer to the earlier pages for more details F SHEEP HFYOO SETUP HEH 20 00kH2 B 14d EL 20 0 80 0 20 100H2 ik ik Fig 4 9 F Sweep Screen 4ard_ OCT FLAT 25 0H2 21d EL Fig 4 10 1 3rd oct Screen SCOPE FLAT _ SETUF HEH Ln ae 0 1008 DIU Pe O 2m5 DTU 1 000kH2 Fig 4 11 Scope Screen 45 Troubleshooting 5 TROUBLESHOOTING System Break Down e Switch the device off e Reset the ML1 to the default status by pressing the ESC button and switching the Minilyzer on simultaneously e Release the ESC button The below screenshot Fig 26 shall appear on the display stating on the bottom line LOADING DEFAULT SETUP e Verify the correct operation ANALOG AUDIO ANALYZER HLL ML1 REE TS5AZAZ 13 12 INITI
4. HODE PELS FRESS ESC TO EXIT SETUF Fig 4 1 Setup Induction Loop Mode After this the ML1 restarts in the induction loop measurement mode To return to the common ML1 measurement mode disable the induction loop mode in the setup page again 41 Measurement Functions Induction Loop Measurement Menu The Minilyzer restarts with an specific new AFILS measurement menu including vLevel fast weighted MML SETUP Aen Level slow weighting Level PPM a4 THD N e F Sweep frequency sweep D 3 d B LF 1 3rd oct spectrum analyzer B6 6 dBLF Scope e Calibrate Fig 4 2 Induction Loop Menu Units mA m dBL The magnetic field strength is measured in A m Ampere per meter AFIL systems use 400mA m as a reference level The logarithmic unit of the magnetic field strength is dBL dB Loop and has a reference level of 400mA m dBL 20 log Magn fied strength mA m 1 The designator of the unit dBL is not standardized jet but resulted of IEC 60118 committee members recommendations 42 Induction Loop Mode Calibration An induction loop receiver transforms a magnetic field strength to an electrical level The receiver sensitivity is specified within the technical data Before a valid measurement can be started the ML1 sensitivity setting must be adjusted accordingly ee SETUF HEH INDUCTION Loor SENSITIVITY 4OOmAcm O 00dEu NOTE REFERENCE LEWEL Fok dEL IS 400 mam Fig 4 3 Calibra
5. event for many hours The results can then be loaded to a PC and visualized as a level diagram using e g Microsoft Excel The stored results remain within the Minilyzer memory even in the event of a battery failure during the recording session T Start SPL LEQ logging LEVEL HoT EETU AER After the ML1 is successfully HOBB_LULSFL registered you will find WIEW DELETE the additional LOG AS Lu function in the LEVEL SPL memory menu This feature Se enables you to record the a 20dkr pIu 100 following test results Actual SPL and LEQ value LEQ Overload Fig 3 5 SPL Logging Start At each recording interval SPL averaged minimum and maximum 23 Measurement Functions LEDEL A LITD SETUP HEN Setting of recording time STORE As 3 Ari HOBE_LULSFL The maximum recording time END of the sound pressure level logging depends on the remaining memory and the selected test interval period T The logger may record a maximum of 1500 points over Fig 3 6 SPL Logging Setting a custom defined time The test interval period T can be defined by the user in the format hh mm ss Review logging records 5 P L Fi L E When checking the recorded data in the memory overview the SPL LEQ LOG DATA screen is displayed The result table is stored together with this screenshot and can be read out by using the Fig 3 7 SPL LEQ Memory MiniLINK PC software LOG DATA Note During the ML1 SPL LEQ
6. sound pressure level acquired during the measuring time indicated by the clock The maximum value is stored until a new higher reading has been taken Pause The ks and min max measurement may be freezed for a user defined time e Select the pause symbol and press the enter key The pause symbol is flashing e The actual SPL reading is continuously displayed and not freezed e Select the pause symbol and press the enter key to continue the measurement visible by the continuing counting clock Clock Duration in hours minutes seconds of the actual measurement select the clock and press the enter key to reset the time and restart the measurement 21 Measurement Functions Time weighting All sound pressure level measurements include time weighting A change in sound pressure level is read out on the display with a shorter or longer response time Available response times corresponding to IEC 60651 are SLOW long attack and release time e FAST short attack and release time IMP impulse very short attack and long release time Bargraph The bargraph provides an analog display of the actual sound pressure level Available bargraph ranges are 20 100 dB 40 120 dB 60 140 dB The selected bargraph range complies to the measurement range of the instrument To achieve accuracy of the measurement within the specified tolerances the proper range must be selected called primary indicator range The
7. stored internally even after leaving the sweep mode or switching off the Minilyzer As soon as the time sweep mode is re entered the last displayed curve will appear on the graph until a new time sweep recording is started NOTES As soon as the sweep mode is entered the filter that has been active during the recording of the last curve will be re activated e If a running time sweep is stopped due to empty batteries the recorded data will not be lost e The auto power off is disabled during a time sweep 36 Measurement Functions 1 3 Octave RMS The 1 3 OCTAVE RMS screen shows the signal frequency spectrum of the line in signal divided into 31 bands 1 3rd Octave Arrow Readout Spectrum Arrow ECF LAT SE TUF MEH Mode J15H2 12dEu Run Pause Scaling Zoom of Y Axis Y Axis Time AGE Constant 80 2OdEu DT 20 Bargraph of Level RMS fullband Fig 3 19 1 3 Octave RMS Screen To enter the 1 3 OCTAVE RMS mode select 1 3 OCT gt RMS in the measurement functions submenu Arrow Readout The arrow readout displays the frequency and the level of the 1 3 octave band that it points to The arrow automatically points to the highest level in the 1 3 octave spectrum or alternatively may be controlled manually Arrow Mode The arrow readout may be moved manually to a certain specific 1 3 octave band Select the arrow mode field and press the enter key Move the arrow to any frequenc
8. sweep is started NOTES As soon as the sweep mode is entered the filter that has been active during the recording of the last curve will be re activated e The auto power off is disabled during a frequency sweep recording 34 Measurement Functions b Time Sweep In the TIME SWEEP mode ML1 records a user defined number of measurements in selectable time intervals Arrow Mode REC Stop X Axis Scroll Control Indicator Mean Min Max i Mode Scaling refers Y Axis 7 to this line Zoom Mode Readout Line Arrow Readout Fig 3 17 Time Sweep Graph Thereby the unit simultaneously records the mean and the min max values of e LEVEL RMS and THD N and e Frequency The curves of these measurement functions are stored in individual graphs Within a graph every sample is represented by a single dot only thus building the displayed curve In practice the following steps are required available for the execution of a time sweep To enter the time sweep mode select the entry SWEEP TIME in the measurement function submenu If required activate a filter through the corresponding menu To select the curve to be displayed LEVEL RMS THD N or Frequency move the cursor to the curve entry press enter key use the arrow keys and confirm with the enter key To select the mean min max mode move the cursor to the corresponding field press enter and the arrow keys The curve and the mean min max mode c
9. to 0 dBu 80 to 20 dBu please note in this range the residual noise of ML1 is gained by 20 dBu 1 3 Octave SPL The 1 3 OCTAVE SPL screen shows the signal frequency spectrum of the acoustic signal divided into 31 bands 1 3rd Octave Arrow Readout Spectrum Arrow EG FLAT SETUP MEH Mode Run Pause Scaling Zoom of Y Axis Y Axis Time f A Constant 20 dErDIN 120 Bargraph of Level SPL Fig 3 20 1 3 Octave SPL Screen 38 Measurement Functions To enter the 1 3 OCTAVE SPL mode Fig 3 20 select 1 3 OCT gt SPL in the measurement functions submenu Arrow Readout The arrow readout displays the frequency and the level of the 1 3 octave band that it points to The arrow automatically points to the highest level in the 1 3 octave spectrum or alternatively may be controlled manually Arrow Mode The arrow readout may be moved manually to a certain specific 1 3 octave band e Select the arrow mode field and press the enter key Move the arrow to any frequency by using the left right keys Run Pause The 1 3 octave spectrum may be freezed Select the run pause field and press the enter key e The1 3 octave spectrum is freezed The arrow mode or zoom symbol may be selected for the detailed read out of the 1 3 octave spectrum At selecting any other field the measurement will be continued e Press the enter key again to continue the measurement Zoom Y Axis The scaling of the spectrum s Y axi
10. two range indicator arrows assist to set the Minilyzer to the optimal range As soon as the indicated bargraph value is found lower than the primary indicator range the down arrow symbol below RNGE will start to move symbolizing the actual bargraph reading is inaccurate The lower bargraph range needs to be changed manually by selecting the moving left arrow symbol and pressing the enter key LEVEL A LITD SETUP HEH CALTE Wt 00 02 38 dEr DuL ACT dESPL FAST REDE ME l 20 dEr DIN i20 Fig 3 4 SPL Panel with Overload 22 Measurement Functions By exceeding the primary indicator range four overload arrows replacing the dBL reading and no reading below is shown see Fig 13 Select the right arrow below RNGE and press enter to change to the next higher bargraph range In case signal clipping has occurred the term OVL is flashing above the RNGE field as long as this peak is significant influencing the integrating sound pressure level reading For example an SPL peak for 0 1 sec will have effects to the L reading for several seconds but it s contribution can be neglected after ten minutes b SPL LEQ Logging The Minilyzer together with the optional MiniLINK USB PC interface enables the data logging of all test results Note The logging function is a free add on to the MiniLINK available after the registration of your test instrument The Minilyzer can record the SPL LEQ curve flow e g during an
11. ALIZING SYSTEH Fig 5 1 Start Up Screen Loading Default Setup In case you find system breakdowns happening several times or your device is malfunctioning please contact the local NTi Audio representa tive in your country For contact details please see the NTi Audio web page www nti audio com Low Level Measurements The Minilyzer does automatically 1 recognize the actual input XLR or RCA in use To measure low level audio signals lt 70 dBu 3 the balanced input shall be used only Unbalanced signals need Fig 5 2 XLR RCA Adapter to be connected to the XLR input via an XLR RCA adapter 46 Accessories 6 ACCESSORIES MiniSPL The MiniSPL is the perfect accessory for acoustical measurements Together with the Minilyzer ML1 a comprehen sive integrating sound level meter is formed The MiniSPL is a self contained omni directional 1 2 measuring microphone with built in impedance converter pre amplifier and power supply It is battery powered and the XLR output is balanced The MiniSPL is classified as type 2 in accordance with IEC 60651 MiniLINK MiniLINK allows documentation and data acquisition of ML1 functions in conjunction with the easy to use Mini LINK PC software MiniLINK is an upgradeable kit for all existing and new Minilyzers It consists of a small plug in USB interface board that can be easily installed without any tools MiniLINK supports Storing measurement results and screenshots
12. Harmonic Distortion Noise and the k2 k5 harmonic distortion THO H FLAT SETUP HEH 9 989kH2 a3 Input Level RMS 20 dE Dll 0 00 Fig 3 10 THD N Meter Panel The measurement is carried out in the band from 10 Hz 20 kHz expressed in dB or in Simultaneously the LCD shows the actual RMS input level or the 2nd 3rd 4th amp 5th harmonics distortion below the THD N result NOTE The THD N results are calculated using a restricted measuring bandwidth of 10 Hz 20 kHz Besides checking the linear purity of a sine signal e g measuring amount of harmonic distortions this measurement mode is particularly suited to get a quick idea whether unwanted disturbances like hum are present 27 Measurement Functions vu PPM ML1 provides vu PPM Peak Program Meter measurement results following IEC60268 Waa SETUP HEH Numerical Reference lt Peak Hold Level Graphical Peak Hold SSS 50 40 20 G a Ode 5 Integration Time Reference Indicator Fig 3 11 vu PPM Type I Panel The PPM may be measured according to three standards Type Type IIA Nordic standard One of these standards has to be selected when entering the vu PPM mode through the measurement functions menu The following chapters describe the different entry fields and indicators of the vu PPM display a Reference Level amp Indicator The reference level indicates the RMS level of a 1 kHz sine wave that defines th
13. LEVEL SPL mode Fig 3 3 select LEVEL gt SPL in the measurement functions submenu For most of the ML1 applications the sound pressure level measurements require the use of the A weighting filter To prevent wrong filter settings causing wrong non usable test results the default filter setting of the LEVEL gt SPL mode is A weighting A WTD Note Each time the LEVEL SPL mode is selected the A weighting filter is pre set by default 20 Measurement Functions Start of measurement The sound pressure level measurement is re started every time e The LEVEL SPL screen is entered e The filter selection is changed e The clock is reset e The time weighting selection is changed The bargraph range selection RNGE is changed Sound Pressure Level The equivalent continuous sound pressure level also time averaged sound level is indicated in BL OBL OBL depending on the selected filter in the filter menu Example e select in the main menu the filter A WTD e the measurement unit is changing to dBL and the minimum maximum and actual sound pressure level readings below are A weighted Below the time averaged SPL reading one of the following values may be displayed select with the cursor keys e ACT actual sound pressure level SPL e MIN minimum sound pressure level acquired during the measuring time indicated by the clock The minimum value is stored until a new lower reading has been taken MAX maximum
14. Minilyzer ML1 User Manual Less noise e More sound NTi Audio Contact Headquarter 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 Home www nti audio com NTi Audio is an ISO 9001 2008 certified company NTi Audio AG All rights reserved Subject to change without notice Release 3 12 May 2011 Software V3 12 Minilyzer Minirator MiniSPL and Minstru Made in ments are registered trademarks of Switzerland NTi Audio AG TABLE OF CONTENTS 1 INTRODUCTION 2000 CE Declaration of Conformity Registration International Warranty and Repair Warnings Overview 2 Basic OPERATION Power ON OFF Backlight Escape inana Enter Cursor Control Inputs and Monitor Output Music Detection Polarity Signal Balance Error Sweep 1 3 Octave RMS 1 3 Octave SPL INDUCTION Looe Mone oPTIONAL 5 TROUBLESHOOTING System Break Down Low Level Measurements 6 ACCESSORIES 10 MiniSPL MiniLINK ML1 Adapter 20dB Minstruments System Case 7 TECHNICAL SPECIFICATION Technical Data General Functions Technical Data Acoustic Functions ig Test amp Calibration Certificate eee eccecceeseeeeeeeteeeeeeeenreeeeees Introduction 1 INTRODUCTION Congratulations and thank you for buying NTi Audio s Minilyzer ML1 a product specially suited f
15. an also be selected after the sweep recording is completed Move the cursor to the REC field and press enter 35 Measurement Functions A dialog box will open Fig 3 18 on the graph where the SLEEP A LITD SETUP sweep duration min 60 sec m AS REC max battery lifetime and the 200 EHD 00 26 40 recording interval gt 1 sec have AT 00 00 01 to be entered Please note that the number of samples must be 0 between 60 1600 00 00 00 00 04 00 Fig 3 18 Time Sweep Setup To start the sweep recording move the cursor to the GO field and press enter The time sweep automatically stops when the defined duration has expired Alternatively the sweep may be stopped manually by pressing enter with the cursor on the REC field To display the mean or the min max values of the recorded sweep place the cursor to the corresponding field and select the required mode by using the enter and the arrow keys In order to analyze the sampled curve more detailed activate the arrow mode by placing the cursor to the corresponding symbol and pressing the enter key Move the readout line to the sample s of interest by using the left right keys or press the up down keys to zoom out in the X axis To zoom in out the Y axis move the cursor to the zoom mode field press enter and use the up down keys to zoom out in the Y axis use the left right keys to scroll through the Y axis The last time sweep recording will be
16. e frame WORKING followed by the frame CALIBRATION FINISHED is shown centered on the calibration screen if all has been found in good order Otherwise various error indications may 25 Measurement Functions be displayed to inform the user about the detailed problem e The new sensitivity is calculated by the Minilyzer and shown below USING EXT REF in mV Pa e Press the ESC button to exit the calibration mode and return to the LEVEL SPL screen e Check the calibration by applying the reference signal again to the attached microphone The sound pressure level of the calibrator shall be shown to confirm the calibration is carried out in good order Error indications will appear during the calibration caused by low high input level or the calculated sensitivity is out of the range 2 80 mV Pa SET SEMSITIUITY co TO DEFAULT HTMTEO HTF me le HARUALLY 20 0 UPA PRESS ESC TO ENIT CALIE Fig 3 9 Calibration Finished MANUALLY Select the setting value xx x mV Pa e Press enter and select with the cursor keys the sensitivity according to the attached microphone use up down keys for 1 0 mV Pa steps and left right keys for 0 1 mV Pa steps The setting range 2 80 mV Pa is supported Simply press the ESC button to exit from the calibration screen back to the LEVEL SPL screen The new measurement is started immediately 26 Measurement Functions THD N In this mode the Minilyzer measures the THD N Total
17. e value of the reference indicator The reference level may be defined by the user in a range of 20 dBu to 14 dBu The default reference level depends on the selected standard 4 dBu for the vu meter 6 dBu for the PPM standards Type and Nordic 8 dBu for the PPM standard Type IIA 28 Measurement Functions The following examples explain the correlation between the reference level and the reference indicator Example 1 Given vu meter reference level set to 4 dBu Input signal steady state sine wave of 4 dBu Result vu meter level 0 reference indicator level Example 2 Given vu meter reference level set to 0 dBu Input signal steady state sine wave of 4 dBu Result vu meter level 4 4 dB above reference indicator Example 3 Given PPM Nordic standard reference level set to 12 dBu Input signal steady state sine wave of 6 dBu Result PPM level TST 6 dBu below reference indicator level b Peak Hold There are two different types of peak hold on the vu PPM screen e Two numerical peak hold indications located above the right hand end of the vu and the PPM bargraph The numerical peak hold indicates the all time max input level since the vu PPM mode has been entered It may be reset by placing the cursor to it and pressing the return key To reset the two numerical peak hold simultaneously simply re enter the vu PPM mode Two graphical peak hold indications represented by a vertical line
18. emands of the user e Auto power off duration e Auto backlight off duration e LCD contrast e Multiple setup individual settings for up to 4 users Introduction Battery Replacement After unpacking insert three 3 pcs 1 5 V alkaline batteries type AA LR6 AM3 into the ML1 battery compartment as shown in Fig 1 and Fig 2 The typical life time for a set of alkaline batteries is 16 hours 1 Press 4 Pd ri 2 Pul i Fig 1 1 Open Battery Compartment Fig 1 2 Inserted Batteries NOTES Wedonotrecommend to use rechargeable NiCd or NiMH batteries Do not insert batteries of different types e Note the correct polarities of the inserted batteries e Remove the batteries as soon as they are flat and change all batteries at the same time Basic Operation 2 BASIC OPERATION Despite the wide range of available measurement functions and optional setups the operation of the Minilyzer is almost self explanatory Measurement Filter Setup Function Running Low Battery Frequency Measurement Signal Result and Unit Balance Display Mode Bargraph pay Zoom Scroll Bargraph Power ON OFF Escape p Backlight Enter Cursor Control Keys Fig 2 1 Display amp Control Elements The LCD is divided in the menu bar on top measurement function filter setup and running low battery and the results displayed below are showing various information s about the current status The cursor control ke
19. ements with MiniLINK Frequency Range 10 Hz to 20 kHz Resolution 4 digits Accuracy lt 0 1 Level Units dBu dBV Vins Resolution 3 digits dB scale or 4 digits V scale Accuracy 0 5 1 kHz Bandwidth 20 Hz to 20 kHz Flatness 0 1 dB THD N Total Harmonic Distortion Noise Meas Bandwidth 10 Hz to 20 kHz Resolution 3 digits dB scale or 4 digits scale Residual THD N balanced lt 85 dB 10 dBu to 20 dBu unbalanced lt 74 dB 0 dBu to 14 dBu vu PPM vu Indicator and Peak Program Meter according to IEC 60268 and DIN 45406 PPM Type I Ila and Nordic Both meters with adjustable reference and with analog amp numerical peak hold readout Polarity Test with Minirator test signal Positive Negative detection through internal microphone or XLR RCA connector Checks polarity of tweeters midrange speakers woofers sub woofers and cables Down to 10 dB S N ratio of input signal 49 Technical Specification Signal Balance Error Indication range 0 0 to 100 Deviation from perfect balance in or 1 Sweep Frequency Sweep Level as function of frequency Time Sweep Measurement of level THD N and frequency as function of time 1 3 Octave Spectrum acc IEC 1260 class II and ANSI 1 11 1976 class II from 50 Hz to 20 kHz Bargraph for Level 20 Hz to 20 kHz Scope Auto triggering auto ranging auto scaling Filters Linear A weighting C weigting C message Highpass 22 Hz 60 Hz 400 Hz X Cu
20. ent of a very complex signal phasing Drivers speakers and cross overs cause severe phase shifts of the audio signal The polarity of various speakers within the same cabinet can be different This is not a problem nor caused by bad speaker design Polarity testing is useful for checking the correct wiring of similar speaker systems 30 Measurement Functions An overrange indicator appears for levels exceeding the instruments operating range In this case increase the distance between microphone and loudspeaker or reduce the volume b Cable polarity test Use the polarity test signal of the Minirator to feed the cable under test The Minilyzer analyzes the signal polarity at the other end of the cable FOLARITY SETUF HER Minilyzer settings IN XLR RCA In aL RCA a F j PCA E LE Mode Cable POSITIVE LUL 0 8 dEu USE HRi FOLARITY SIGNAL Fig 3 14 Cable Polarity Panel The following problems may be detected quickly and easily in this way e Wrong polarity caused by wrong or defective wiring inside the cable Cable problems unsymmetrical signals displayed with the balance indicator can lead to the accurate detection of various cable problems such as e UBAL leads to a broken internal wire at a symmetrical XLR cable The balance indicator out of center leads to other cable problems as explained in detail in the NTi Audio application note Signal Balance available for dow
21. ey Display Mode Giving a better readability the display mode determines the rapidity of following up input signal changes The available modes are SLOW 3 sec averaging NRM 1 sec averaging e FAST no averaging If averaging is active measurements are smoothed in an exponential way exponential time constant before being displayed Basic Operation Menu Bar The menu bar located at the top of the LCD allows the user to select the measurement function to activate a filter or to enter the setup screen The field on the right hand side displays the battery voltage status of the unit To make any selection move the cursor to one of the menu bar fields and a press the enter key Selection of Measurement Function LEVEL ies SETUF HEH Fig 2 2 Example of Function Submenu The entries of the pull down menu are the following LEVEL RMS LEVEL REL the RMS input level relative to a user defined reference level LEVEL SPL sound pressure level THD N total harmonic distortion and noise vu PPM volume indicator and peak program meter selectable standards are Type I Type IIA Nordic POLARITY analysis function corresponding to the Minirator MR1 polarity test signal acquired either by direct cable connection or through the built in microphone of ML1 BALANCE the signal balance error quantitatives the level deviation between pin 2 and pin 3 of the XLR input connector SWEEP sweep recording with res
22. he Minilyzer ML1 by the following procedure Move the cursor to the corresponding field and press enter e Select the required status by using the arrow keys e Press the enter key to confirm SETUF AUTO POWER OFF ERG AUTO LIGHT OFF 3 SEC LCD CONTRAST HULTIFLE SETUF DISHELE IND LOOF HODE DISHELE FRESS ESC To EXIT SETUF Fig 2 4 Setup Screen AUTO POWER OFF defines the time after the ML1 is switched OFF automatically after the last key press The available settings are 3 MIN 10 MIN 30 MIN 60 MIN and DISABLE In case DISABLE is selected the user has to turn the unit off manually or it will run until the batteries are discharged AUTO LIGHT OFF defines how long the backlight stays on after being activated Possible selections are 3 SEC 10 SEC 60 SEC and DISABLE In the latter case the backlight will stay on until the unit is switched off The longer the backlight is turned on the shorter is the lifetime of the batteries LCD CONTRAST adjusts the contrast of the display Alternatively press the ESC and up down arrow key simultaneously in any measurement panel MULTIPLE SETUP allows four users to store their individual settings To enable the multiple setup mode set the corresponding entry to ENABLE and confirm At the next the Minilyzer is switched on the user will have to select the individual setup ID 1 2 3 or 4 in the startup screen All parameter settings in all measurement modes are now sto
23. in each bargraph The graphical peak hold display has a decay time of approximately one second c Integration Time The PPM display provides an additional entry field to select the attack and release times between NRM normal and FAST Inthe NRM mode the value of the integration time is given by the corresponding standard Type 5 ms Type IIA 10 ms Nordic 5 ms In the FAST mode the integration time is 1 ms for all standards 29 Measurement Functions Polarity The polarity test function detects the correct cable and speaker polarity in combination with the Minirator The Minilyzer provides the following test configurations a Speaker polarity test POLARITY SETUF HEH Feed the speaker system with the polarity test signal of 2 1 the Minirator and adjust the level at Minirator or amplifier LAR CA a FULLAHID POS I T I WE that the test signal is good to hear USE HRL FOLARITY SIGNAL Minilyzer settings Fig 3 12 Speaker Polarity Panel IN MIC INT using the internal mic of the Minilyzer ML1 POLARITY SETUF HEH P IN XLR RCA using an In HLA ARCA a Fj SBUGGFER external mic such as the POSITIVE 5 USE HR1 FOLARITY SIGNAL Choose the polarity test frequency range e FULL MID for tests with Fig 3 13 Woofer Polarity Panel wide band speakers Note WOOFER for tests with woofers Please note the polarity testing is a simplified measurem
24. into the ML1 flash memory Logging on line measurement results onto the PC Induction Loop Measurements AFILS acc standard IEC 600118 47 Fig 6 1 MiniSPL Fig 6 2 MiniLINK Accessories ML1 Adapter 20dB The ML1 Adapter 20dB may be applied for balanced input levels higher than 20 dBu This passive adapter extends the balanced input range of your Minilyzer up to 40 dBu Starting April 2004 this adapter is sup plied with pin1 fuse for safe operation in combination with the USB interface MiniLINK Pouch The soft pouch protects your Minstru ment against shocks dust and water With its convenient belt clip you can keep your Minstrument close to you even when you need both hands for other tasks j Fig 6 3 ML1 Adapter 20 dB Fig 6 4 MLI Pouch Minstruments System Case Store your valuable Minstru ments in this compact system case It holds the Minirator MR1 MR PRO MR2 the Minilyzer ML1 Acoustilyzer AL1 or Digilyzer DL1 and the MiniSPL with adequate extra space for your cables and connectors for those out in the field jobs 48 Minstruments E ia a Fig 6 5 System Case Technical Specification 7 TECHNICAL SPECIFICATION Technical Data General Functions Measurements Level RMS Level Relative Frequency THD N vu PPM Polarity Test Signal Balance Error Sweep Frequency Sweep Time Sweep 1 3 Octave Spectrum Scope Frequency AFILS measur
25. logging the change of settings is not possible 24 Measurement Functions c Calibration Panel The Minilyzer ML1 enables the calibration of microphones such as the MiniSPL SET SEMSITIUITY TO DEFAULT oy HIMISPL HIC USING mE EXT REF 114 0 d SPL HAMUALLY 20 0 mU PA PRESS ESC TO ENIT CALIE Fig 3 8 Calibration Panel Select CALIB in the LEVEL SPL panel field Press the enter key and the calibration screen SET SENSITIVITY will be displayed Fig 14 The following three calibration modes are available TO DEFAULT MINISPL MIC All MiniSPL are factory calibrated to a sensitivity of 20 0 mV Pa Reset to default setting e Select the GO field on the left e Press the enter key to start OK is shown to confirm the completed calibration USING EXT REF The sensitivity may be adjusted with an external calibrator to produce a certain calibrated sound pressure level e Select the dB value press the enter key and adjust with the cursor keys the sound pressure level generated by the calibrator Use up down keys for 1 0 dB steps and left right keys for 0 1 dB steps The setting range 80 140 dB is supported e Confirm the setting with the enter key e Produce the specific reference signal with the calibrator to the microphone attached e Press the left cursor key to select the GO field and press enter to execute the calibration whilst the reference signal of the calibrator is still present Th
26. ng by the bargraph zoom mode field e Within the manual scaling press the left right keys to scroll through the actual range or the up down keys to increase or decrease the range sensitivity of the bargraph scale e Press enter to confirm your setting 32 Measurement Functions Sweep ML1 supports two sweep modes e LEVEL RMS as function of frequency e LEVEL RMS THD N and Frequency as function of time The required sweep mode may be selected through the SWEEP entry of the measurement function submenu a Frequency Sweep During a frequency sweep ML1 records the LEVEL RMS of every input signal that has a stable frequency and level provided that the frequency is higher than the one of the previous sample otherwise the sample will be neglected Measurement Mode Filter ERAT ETU nEn A H a DEJE Arrow Mode Control 10 0 d u Y Scale Zoom Mode REC Stop Control 0 0 20 i00Hz ik Arrow Readout Fig 3 16 Frequency Sweep Graph Within a graph every recorded sample is connected by a straight line approximation to the previous next sample thus building the displayed curve In practice the following steps are required available for the execution of a frequency sweep To enter the frequency sweep mode select in the measurement function submenu SWEEP gt FREQ e If required activate a filter through the corresponding menu 33 Measurement Functions e Arm the sweep recording proce
27. ng to class 1 Time Response Selectable fast slow impuls Weighting Filters Selectable A C linear X Curve for 1 3 octave spectrum only Integration Pause and Continue Function 1 3 Octave Spectrum 31 octave band display 20 Hz to 20 kHz Sensitivity Selectable default value MiniSPL calibration to external source editable sensitivity value 51 Test amp Calibration Certificate This is to certify the Minilyzer ML1 is fully tested to the manufacturer s specifications NTi Audio recommends to calibrate this test instrument one 1 year after purchase Thereafter the calibration and adjustment interval is subsequently one 1 year 52 Quick Guide Minilyzer ML1 Menu Bar Measurement Display Escape On Off 2 sec Enter Cursor Control Keys Measurement Function Menu LEVEL RMS H REL SPL THD N VU PPM TYPE H TYPE IIA NORDIC POLARITY BALANCE SWEEP FREQUENCY TIME 1 3 OCTAVE RMS SPL SCOPE 2000 TD 01 10
28. nload at the NTi Audio website wwwhti audio com The level measurement is very useful for applications such as testing of multicore cables providing additional information about the cable quality 31 Measurement Functions Signal Balance Error The signal balance error reflects the deviation from the perfect balance status No signal balance error indicates that the absolute levels at XLR pin 2 and pin 3 relative to pin 1 ground are identical and opposite in polarity Frequency of Signal Balance Balance Indicator Input Signal Error XLR pin 2 3 eee SETUP AEN Bargraph Zoom Mode Bargraph vel RMS Zoom Control Daz DN 4 00 Bargraph with Scaling Information Fig 3 15 Signal Balance Error Screen In the BALANCE mode the signal balance error is shown in a numerical value which is the deviation from the optimum in percent Balance Indicator The direction of the deviation is indicated by the arrows like 2 lt 3 or 2 gt 3 whereby the numbers 2 and 3 represent the signal at XLR pin 2 and pin 3 In the Level THD N and Polarity electrical input only measurement function the Minilyzer permanently monitors the balance of the input signal by a graphical indicator This enables e g to check whether cable connections are made correctly Bargraph The bargraph shows an analog display of the signal balance error The scaling may be controlled automatically or manually Select manual M or automatic A scali
29. or all further level relative measurements until a new reference level is set The level relative is indicated in dBr dB relative or The level relative function may be used to measure the signal to noise ratio S N of a device under test DUT in the following manner Set the unit of the level relative measurement to dBr Connect the DUT output to the ML1 and mute the DUT output e Adjust the reference level to this signal as described above By this the noise signal of the DUT is acquired Enable the DUT thus applying the signal to the ML1 The resulting level relative value reflects the S N ratio in dB 19 Measurement Functions Sound Pressure Level In the LEVEL SPL mode the Minilyzer measures the integrated averaging level over time the actual minimum and maximum sound pressure level NOTES For this function a self powered microphone is required NTi Audio does recommend to use the accessory MiniSPL for details see Accessories Prior the first measurement the Minilyzer has to be calibrated to the microphone specifications As default the ML1 is calibrated according the MiniSPL No phantom power is available on the XLR input a Sound Pressure Level Panel Pause Clock Equivalent Continious Calibratio Sound Pressure Level Minimum Time Maximum or Actual SPL VANGE Weighting eed OED i20 SPL Bargraph with manual ranging Fig 3 3 Sound Pressure Level Panel To enter the
30. or professional audio applications The Minilyzer offers advanced analysis functions expected only in much larger and more expensive systems We are convinced you will enjoy using it NTi Audio products are manufactured in compliance with the highest quality standards and marked with the CE sign In order to avoid any damage to the unit we strongly recommend to read the entire manual before you start using the instrument CE Declaration of Conformity We the manufacturer NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe hereby declare that the product Minilyzer ML1 released in 2000 conforms to the following standards or other normative documents EMC Directives 89 336 92 31 93 68 Harmonized Standards EN 61326 1 This declaration becomes void in case of any changes on the product without written authorization by NTi Audio Date 01 04 2000 Signature sA Le ys Position of Signatory Technical Director Introduction Registration 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 e Activate options Enable additional functions for your products e Access premium content Access downloads information and specific support for your products e Receive application and product news Sign in for the NTi Audio Newsletter Get fast worldwide support Register your products for fast support Confirm yo
31. pect to frequency or time 1 3 OCT RMS one third octave spectrum of line input signal 1 3 OCT SPL one third octave spectrum of microphone input signal sound pressure level SCOPE the time graph of the input signal 13 Basic Operation b Selection of Filters A LITD L O00kH2 e Hess 20 0 Fig 2 3 Example of Filter Submenu There are two sets of filters with the following characteristics available Set 1 FLAT A WTD C MESS HP22 HP60 HP400 VOICE Flat frequency response no filtering A weighting filter acc IEC 60651 C Message filter acc CCIR Rec 468 4 Highpass 22 Hz acc DIN 45045 120 dB dec Highpass 60 Hz acc DIN 45045 120 dB dec Highpass 400 Hz acc DIN 45045 120 dB dec Voice band filter acc ITU T P 48 Set 1 filters are applicable with the measurement functions LEVEL RMS LEVEL REL THD N and SWEEP Set 2 FLAT A WTD C WTD X CRV Flat frequency response no filtering A weighting filter acc IEC 60651 C weighting filter acc IEC 60651 inverted X Curve filter acc ISO 2969 Set 2 filters are applicable with the measurement functions LEVEL SPL and 1 3 OCT whereby the X CRV filter is enabled in the 1 3 OCT mode only Any selected filter will stay active until it is disabled by the user However if the filter is not supported by the measurement function it will be disabled automatically Basic Operation c Setup The setup screen allows to customize basic settings of t
32. red under this ID at switch off IND LOOP MODE allows to activate the AFILS measurement mode to measure amp verify hearing aid installations 15 Basic Operation ANALOG AUDIO ANALYZER HLI SELECT SETUP Fa 2 3 4 AEEZTSAZAZ i i HELLE Pe INITIALIZING SYSTEH Fig 2 5 Multiple User Startup Screen NOTE Only the last recorded sweep curves will be stored independent on the selected user setup d Low Battery Indicator The MEM field is displayed in the right hand field of the ML1 menu bar Alternatively if the inserted batteries are almost exhausted this field will show a battery low indicator NOTE As soonas the batteries are discharged they must be removed from p the ML1 in order to avoid damage due to leakage i Fig 2 6 Low Battery Indicator Basic Operation Inputs and Monitor Output On top of the ML1 three connectors as well as the internal microphone are located e The XLR and RCA inputs allow to feed a signal to the ML1 A3 5 mm 1 8 jack monitor output allows the connection of a headphone Thus the user may hear the input signal e The internal microphone provides the possibility to test the polarity of an acoustical signal if the NTi Audio s Minirator polarity check signal is played back This especially serves to check the polarity of loudspeakers XLR amp RCA Monitor Internal Inputs Output Microphone Fig 2 7 Inputs and Outputs of ML1 NOTE Never connect the XLR
33. rve Voice bandpass Input Connectors XLR balanced RCA unbalanced Input Impedance 40 kOhm balanced 20 kOhm unbalanced Input RMS upper meas limit balanced 20 dBu 7 75 Vins unbalanced 14 dBu 3 8 Vic Max DC Input 50 Vic Residual Noise lt 12 uV XLR input shorted Microphone Input for Polarity measurement only Omnidirectional Monitor Output Jack 3 5 mm 1 8 suitable for all common headsets Display Graphic LCD 64 x 100 pixel with backlight Batteries 3x AA package dry batteries alkaline Typical battery lifetime gt 16 hrs Dimensions L x W x H 163 x 86 x 42 mm 6 4 x 3 38 x 1 63 Weight 300 g 10 5 oz incl batteries Temperature 0 to 45 C 32 to 113 F Humidity lt 90 R H non condensing 1 for input levels gt 20 dBu balanced the ML1 Adapter 20 dB is available 50 Technical Specification Technical Data Acoustic Functions Measurements Sound Pressure Level 1 3 Octave Spectrum Acoustical Functions in accordance with IEC61672 Class 2 e Instantaneous Sound Pressure Level Lp e Maximum Minimum Sound Pressure Level Lmax Lmin Time Response selectable e Weighting Filters e Equivalent Continuous Sound Pressure Level Leq e Pause and Continue Function Sound Pressure Level Units dB dB IB neq IB cog Resolution 3 digits Display Ranges 20 140 dB in3 bands 20 100 dB 40 120 dB 60 140 dB L Bandwidth 20 Hz to 20 kHz Flatness Accordi
34. s sensitivity is fixed and may be adjusted manually Select the zoom Y axis field and press the enter key e Use the up down keys to scroll the displayed level along the Y axis and the left right keys zoom out in the Y axis e g alter the resolution of the division Time Constant The time constant corresponds to the integration time of the 1 3 octave recording It may be set to five value 0 2 0 5 1 0 2 0 5 0 seconds A lower time constant results in a quicker more nervous display whilst a higher time constant averages more samples thus providing a more stable spectrum Bargraph Below the spectrum the actual sound pressure level is indicated by a bargraph Select the different indication ranges by moving the cursor to the left or right arrow below RNGE and press enter The available bargraph ranges are e 20 100 dB 40 120 dB e 60 140 dB 39 Measurement Functions Scope To activate the SCOPE mode select the entry SCOPE in the measurement functions menu Measurement Function Ea SETUP Hen GairSbI 4 500kH3 X Axis Scale Fundamental Frequency Fig 3 21 Scope Screen The SCOPE screen visualizes the waveform of the input signal It automatically triggers to the fundamental frequency and selects the scaling of the X axis time and Y axis level accordingly Furthermore the input signals fundamental or most dominant frequency is displayed near the lower right corner of
35. sophisticated audio test instrument supporting a wide range of useful measurement functions The results are displayed on a large LCD with backlight e Level RMS Relative or SPL Sound Pressure Level THD N Total Harmonic Distortion Noise e vu Indicator and PPM Peak Program Meter e Frequency e Polarity Test in combination with NTi Audio s Minirator e Signal Balance Error e Sweep recording with respect to frequency or time e 1 3 Octave Spectrum RMS or SPL e Scope Additionally several input filters are available depending on the active measurement function e A weighting acc IEC 61672 C message acc CCIR 468 4 e 22 Hz Highpass acc DIN 45045 120 dB dec 60 Hz Highpass acc DIN 45045 120 dB dec e 400 Hz Highpass acc DIN 45045 120 dB dec e Voice Bandpass acc ITU T P 48 e C weighting acc IEC 61672 e X Curve acc ISO 2969 The X Curve filter is especially applicable for the recording monitoring and play back of wide range soundtracks in indoor theatres review rooms or cinemas To measure the acoustic response in such rooms e g the Minirator MR1 shall be used with the pink noise signal selected Via the Minilyzer the 1 3 octave spectrum has to be recorded using the X Curve filter According the ISO norm the result shall be a flat graph a continuous noise spectrum having constant energy per 1 3 octave bandwidth Asetup screen allows to adjust four settings according to the specific d
36. ss by moving the cursor to the REC field and press the enter key Make sure that the signal generator is at its lowest sweep frequency when the recording process is starting The unit detects the start tone 315 Hz or 1 kHz of an external sweep and as soon the frequency changes the recording is automatically started This status is indicated by the flashing REC field Alternatively the sweep recording may be started manually by pressing the enter key with the cursor on the ARM field Consequently ML1 records every incoming signal with a higher frequency than the previous sample The sweep recording will be stopped as soon as an input signal with a lower frequency occurs or as soon as the enter key is pressed with the cursor on the flashing REC field In order to analyze the sampled curve more detailed activate the arrow mode by placing the cursor to the corresponding symbol press the enter key and move the arrow to the sample s of interest by using the left right keys To zoom in out the Y axis move the cursor to the zoom mode field press enter and use the left right keys To scroll through the Y axis move the cursor to the zoom mode field press enter and use the up down keys The last recorded sweep curve will be stored internally even after leaving the sweep mode or switching off the Minilyzer As soon as the frequency sweep mode is re entered the curve will re appear on the graph until a new frequency
37. the scope screen NOTE The scaling of the SCOPE display cannot be changed manually 40 Induction Loop Mode 4 INDUCTION LOOP MODE OPTIONAL The induction loop mode is available upon installation of the MiniLINK PC interface The Minilyzer simplifies verifications and adjustments of AFILS Audio Frequency Induction Loop Systems AFIL systems are used in public buildings to increase the speech intelligibility for users of hearing aids Most hearing aids have a built in magnetic coil receiving audio signals generated by induction loop systems AFIL systems consist of a wire loop and a current amplifier generating a magnetic field into the hearing aid modulated by the audio input signal e g voice Adjustment and verification of AFIL systems is described in the IEC 60118 standard The Minilyzer together with an induction loop receiver is an ideal tool to accomplish the necessary measurements Induction Loop Receivers There are various induction loop receivers available from different AFILS components manufactures All known types work together with the ML1 Some receivers have a built in A weighting filter which must be disabled to prevent measurement errors Activation of the Induction Loop Mode SETUF eu the setup page of the AUTO POWER OFF 10 HIN Change the position Ind AUTO LIGHT OFF 3 SEC loop mode to ENABLE LOD CONTRAST 4 Press ESC key to exit the HULTIFLE SETUF DISAELE setup page IND LOOF
38. ther than specified in this manual No other warranty written or verbal is authorized by NTi Audio Except as otherwise stated in this warranty NTi Audio makes no representa tion or warranty of any kind expressed or implied in law or in fact including without limitation merchandising or fitting for any particular purpose and assumes no liability either in tort strict liability contract or warranty for products Repair of your Minilyzer ML1 In case of malfunction take or ship prepaid your NTi Audio Minilyzer packed in the original box to the authorized NTi Audio representative in your country For contact details please see the NTi Audio web page www nti audio com Be sure to include a copy of your sales invoice as prove of purchase date Transit damages are not covered by this warranty Introduction Warnings In order to avoid any problems during the operation of the instrument follow the rules listed below e Read this manual thoroughly before you operate the instrument for the first time Use the instrument for the intended purpose only e Never connect the instrument to a high voltage output such as a power amplifier mains power plug etc Do not disassemble the instrument Never use the instrument in a damp environment e Remove the batteries as soon as they are flat or if the instrument is not intended to be used for a longer period of time Introduction Overview The Minilyzer ML1 is a
39. tion Panel Filters The ML1 has a built in A weighting and a HP400 high pass 400Hz filter which may be activated using the filter menu For detailed test requirements please refer to the IEC 60118 standard The HP400 filter has an excellent rejection of mains frequencies which sometimes is a dominant part of the signal received by the induction loop receiver LUL_FasT Ga SETUF HEN HINA AHTO aruo 2 4 RESET 67 6 dBi HAG 66 9 dELF E B0 0 20 dELF ADIN 20 0 Fig 4 4 SInduction Loop Filters 43 Measurement Functions Level Fast Level Slow Level of the magnetic field strength measured in accordance to IEC60804 sound pressure level time weighting with different integration times MAAA SETin RUM RF LAT SETUF HEN HINHAY m HINH Y m RESET z 3 RESET z J 67 3 dBe 67 4 dB HAS 67 0 dELF HAH 67 3 dELS E j E BD0 0 20 dELF ADIN 20 0 80 0 20 dELS ADIN 20 0 Fig 4 5 Level Fast 125ms Fig 4 6 Level Slow 1s Level PPM eae LAT SETUF HEH HIN AAK r Level of the magnetic field RES p 4 ET strength measured with a ppm 7B a 3 dE Lp like peak detector type Ila HAH 10 i dELF Integration time 10 ms dBLp dB Loop peak 20 lb le B Y Fig 4 7 Level PPM Screen THD N TR aT SETUF HEH Total harmonic distortion 2 000kH2 2 E ee 45 4 dB Please refer to the earlier pages 4 A Brd 92 5 dE HRM for more details e s E 80 0 20 d ADI 20 0
40. uals a difference in the signal level of 6 dB UNBAL the signal balance symbol changes to UNBAL at the signal balance error exceeding 90 Result and Unit Level RMS The units dBu dBV V are selectable Bargraph The bargraph provides an analog display of the RMS level The scaling may be controlled automatically or manually Select manual M or automatic A scaling by the bargraph zoom mode field e Within the manual scaling M select the bargraph zoom control press enter and the left right keys to scroll through the 18 Measurement Functions actual range or the up down keys to increase or decrease the range sensitivity of the bargraph scale e Press enter to confirm your setting Display Filter see Display Mode NOTES For balanced input levels higher than 20 dBu the ML1 Adapter 20dB may be applied for details see Accessories e The LEVEL RMS function is also available in the SWEEP mode and in 1 3 OCT RMS mode Level Relativ This function measures the input RMS level relative to a user defined reference level Reference Level The reference level has to be defined in the following way LEWEL FLAT SEVUF HEH Select the LEVEL REL 1 600kH2 mode e Apply the intended reference level to a ML1 input connector Move the cursor to the REF field below the main result line and press the Fig 3 2 Level Relative Meter Panel enter key This stores the applied level as the current reference level f
41. ur ownership Allows us to contact you with important product notifications and provides a product record in case of loss or theft How to Register Open the web page http my nti audio com e You are prompted to login or create the 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 the product is listed in the table My NTi Audio Products Introduction International Warranty and Repair International Warranty NTi Audio guarantees the Minilyzer and its components against defects in material or workmanship for a period of one year from the date of original purchase and agrees to repair or to replace at its discretion any defective unit at no cost for either parts or labor during this period Restrictions This warranty does not cover damages caused through accidents misuse lack of care the attachment or installation of any components that were not provided with the product loss of parts connecting the instrument to a power supply input signal voltage or connector type other than specified or wrongly polarized batteries In particular no responsibility is granted for special incidental or consequential damages This warranty becomes void if servicing or repairs of the product are performed by any party other than an authorized NTi Audio service center or if the instrument has been opened in a manner o
42. y by using the left right keys Run Pause The 1 3 octave spectrum may be freezed Select the run pause field and press the enter key e The1 3 octave spectrum is freezed The arrow mode or zoom symbol may be selected for the detailed read out of the 1 3 octave spectrum At selecting any other field the measurement will be continued e Press the enter key again to continue the measurement 37 Measurement Functions Zoom Y Axis The scaling of the spectrum s Y axis sensitivity is fixed and may be adjusted manually Select the zoom Y axis field and press the enter key e Use the up down keys to scroll the displayed level along the Y axis and the left right keys zoom out in the Y axis e g alter the resolution of the division Time Constant The time constant corresponds to the integration time of the 1 3 octave recording It may be set to five value 0 2 0 5 1 0 2 0 5 0 seconds A lower time constant results in a quicker more nervous display whilst a higher time constant averages more samples thus providing a more stable spectrum Bargraph Below the spectrum the fullband input RMS level 20 Hz 20 kHz is indicated by a bargraph without auto ranging Select the different indication ranges by moving the cursor to the left or right arrow below RNGE and press enter The available ranges are 120 to 20 dBu residual noise of ML1 lt 120dBu lt 1uV enables measurement of low signal levels 100
43. ys and the escape button allow straightforward navigation through the available features to quickly get the required information s like e Actual setup measurement function filters Status of the unit batteries Measurement results numerical values and bargraph 10 Basic Operation Power ON OFF Backlight The yellow oval shaped key on the right hand side has the following functions e Device on press and hold it for at least one second to turn the unit on Backlight press it shortly to activate the backlight e Device off press and hold it for at least two second to turn the unit off The Minilyzer will start up in the same mode e g measurement function and with the same settings as it was switched off the last time In case the setup screen has been selected at switching off the unit the previous measurement function will be entered The backlight may be activated at any time without affecting the settings of the unit Please note that the ML1 has independent auto power off functions for main power and the backlight These may be adjusted separately Escape The yellow key on the left hand side labeled ESC activates the escape exit function and may be selected at any time Depending on the instrument status pressing the ESC key performs the following functions No menu is open the cursor returns to its default position top left field A selection menu is open the menu gets closed resetting the
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