Multi Purpose Audio Assistant
Contents
1. MPAA1 can send out pink noise polarity signal There are three kinds of setting to turn off MPAA1 and 1K Hz tone via the XLR Male connector to Procedures an external system at 10 dBu balanced 1 Go to the POWER menu Pink noise mostly used for acoustic 2 Select AUTO OFF and MPAA1 will automatically environment adjusting For example shut down itself and turn off its power 15 minutes sound system equalization after the last operation Polarity often used to check the phase of 3 Select MANUAL OFF MPAA1 will not a signal or speaker wiring automatically shut down itself under any 1K Hz tone a widely used among the circumstance unless batteries are dead professionals for audio signal testing 4 Select OFF MPAA1 will immediately shut down Procedures itself and turn off its power Itis necessary for 1 Connect MPAA1 to your system via the user to turn off the power this way if they wish XLR male connector to save the measurement data into the memory 2 Go to the GENERATOR menu and high of MPAA1 lighten one of the signal to activate it 3 Press ESC to return or press OFF to cancel THE T METER CORPORATION MPAA1 USER S MANUAL Page 23 SIMULTANEOUS OPERATION WITH PC SIMULTANEOUS OPERATION WITH PC The advantage of simultaneous operation with PC is remote control which is particularly useful when the measurement needs to be taken in a space that requires absolutely no presence of any i2. A U pose Audio Assistant S i ji ji Ii fu lh USER S MANUAL the t meter the t meter SAFETY PRECAUTIONS the t meter SAFETY PRECAUTIONS Improper operation and handling of this unit may lead to malfunction Please read the following precautions before operating 1 To prevent damage avoid operating MPAA under these conditions A Temperatures below 0 degrees C 32 F or above 40 degrees C 104 F B Strong magnetic waves in nearby areas C Static electricity D High humidity E Sudden temperature changes F Large amount of dust in area of operation 2 Avoid placing heavy objects on top of MPAA1 3 DO NOT tear apart MPAA 4 Never insert foreign objects into measurement microphone connectors or other openings 5 If MPAA1 is damaged in any way immediately turn off the power and contact your reseller DO NOT continue using the unit 6 Avoid spilling any liquid on or into MPAA If spilling or dampening occurs turn power off immediately and contact your reseller DO NOT continue using the unit WARNING Always use AA SIZE 1 5V DC alkaline battery or 6 volt DC with 5 00mA AC power adaptor to power MPAA to avoid voiding manufacturer product warranty The t meter is not responsible for any damage caused by using other power supply When using AC power adaptor it is essential for user to only use the included adaptor to ensure the accuracy of all measurements Page 2 MPAA1 USER S MAN
3. it automatically cuts off battery power 3 power mode 1 Power saving mode Auto Off when none of the buttons has been pressed for 15 minutes 2 Manual Off 3 Off XLR input and output sockets RS232 communication port for simultaneous operation through laptop or PC One CD ROM with audio test signals and software for PC MPAA1 USER S MANUAL FEATURES Page 5 MENU MAP the t meter MENU MAP Press the ENTER button or jog control to enter the main menu and sub menus cecal LINE dBu SPL LINE LINE dBV LINE Volt ESC MEMORY STORE 1 10 amp ESC YES NO pee PS RECALL 1 10 A F amp ESC STORE avert 1 10 ALL AVG amp ESC RUN ESC YES NO EQ SETTING 31 bands display in graphic and digit ESC ESC FLAT A SETTING WEIGHTING E SC dB SPL 50 10dBu 52 8dBV 5m 2Volt 50 110 dB SPL 35 25dBu 37 23dBV LEVEL RANGE 14m 14Volt 70 130 dB SPL 20 40dBu 22 38dBV 77 5m 80Volt ESC So Oo he O LEVEL H o Ee E E SERR CALIBRATION p Press ENTER to go back In phase PHASE CHECK Out of phase Can not detect OFF PINK NOISE GENERATOR POLARITY 1K Hz ESC AUTO OFF MANUAL OFF OFF ESC POWER Page 6 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter INSIDE THE GIFT BOX 1x MPAA 4x AA Size Batteries 1x AC Power Adaptor 1x PC Serial Interface Cable 1x Leather Case 1x CD ROM including 26 audio testing signa
4. the t meter correspond to the varying sensitivity of the human ear to sound over the audible frequency range MPAA1 comes with both A weighting and C weighting standardized by ANSI American National Standards Institute by far the most frequently used While A weighting can be used for measuring lower sound level C weighting is used for higher sound level And A weighting is the most frequently used type of weighting User can set the weighting for measurement in dBu dBV or voltage Procedures 1 Go to the SETTING WEIGHTING menu 2 Select an appropriate weighting for the measurement and press YES 3 Or press ESC to return THE T METER CORPORATION the t meter LEVEL RANGE SETTING v LEVELRANGE V U 90 GBorF 50 110 dBSPL 70 130 dBSPL ESC 4 10K MPAA has three different ranges for measurement in SPL dBu dBV and voltage SPL 30 90 50 110 70 130 dBu 50 10 35 25 20 40 dBV 52 8 37 23 22 38 Voltage 5m 2 45V 14m 14V 77 5m 80V Procedures 1 Go to the SETTING LEVEL RANGE menu 2 Select an appropriate range for the measurement and press ENTER button 3 Or press ESC to return SETTING MAX LEVEL SETTING v MAX LEVEL V ESC 4 A B1 100 815 K 8 15K 10K Maximum level will always be measured an
5. 630HZz 800Hz 1KHz 1 25KHz 1 6KHz THE T METER CORPORATION APPENDIX 2KHz 2 5KHz 3 15KHz 4KHz SKHz 6 3KHz 8KHz 10KHZz 12 5KHz 16KHz 20KHz 12 Channel test 10 dBu at 1KHz left channel 13 Channel test 10 dBu at 1KHz right channel 14 Sweep frequency up 20HzZ 20KHz 20 dBu 5 seconds for each frequency 15 In phase 0 dB at 250Hz 30 seconds 16 Out of phase 0 dB at 250Hz 30 seconds 17 Digital blank 60 seconds 18 SMPTE EBL time code 30 seconds 19 High E 20 Low B 21 Low G 22 Low D 23 Low A 24 Low E 25 Frequency sweep up 20Hz 20KHz 0 dB 26 Frequency sweep down 20KHz 20Hz 0 dB MPAA1 USER S MANUAL Page 29 the t meter
6. Analyze the audio received through the built in omni directional mic by dividing the audio spectrum into 31 band 1 3 octaves and displaying a bar graph that shows the dB level of each band of sound from 20Hz to 20KHz in four different response time 35ms 125ms 250ms and 1sec and in three weighting types A weighting C weighting and Flat Procedures 1 Approximately 10 seconds after turning on the power the real time analyzer with active 31 band center frequency graphic meter will appear lively on the LCD screen Go to the SPL LINE menu and select SPL Then press ENTER button for two seconds to return to RTA display Go to SETTING menu to set up appropriate WEIGHTING type LEVEL RANGE RESPONSE TIME or set the maximum or PEAK HOLD display on or off then press ENTER for two seconds to go back to RTA THE T METER CORPORATION MPAA1 USER S MANUAL RTA Real Time Analyzer display 4 Now press ENTER button to freeze measurement data Press ENTER button again upon the high lightened VALUE to view the value of the each center frequency 5 Use the LEFT UP and RIGHT DOWN buttons or simply scroll the JOG control to go through all frequencies and each center frequency of the 31 bands and see the level of dB SPL in real time The default readout is the ALL FREQUENCY level Right under that shows you two things the numbers in left column tells you the frequency while the numbers in right column immediat
7. average even though memory 1 10 by moving the cursor to that the peak value has been activated number and press the ENTER button or simply choose ALL if you want to do the average calculation for all ten of them If you want to undo the selection move the cursor to the selected number and press ENTER again 3 The selected number would appear with a square around it for identification 4 Press AVG when finishing selecting the memory then a list of memory selected will be shown for confirmation THE T METER CORPORATION MPAA1 USER S MANUAL Page 17 SETTING SETTING The sub menus of SETTING includes WEIGHTING LEVEL RANGE MAX LEVEL PEAK HOLD RESPONSE TIME and CALIBRATION WEIGHTING SETTING v WEIGHTING W FLAT c ESC lt 4 10K A sound level meter must be designed so that it hears the sound level very much the same way humans do Generally the sensitivity of human hearing is restricted to the frequency range of 20Hz to 20KHz The human ear however is most sensitive to sound in the range of 500Hz to 8 000Hz The ear becomes progressively less sensitive to sound above or below this range To account for this characteristic of human hearing sound pressure level meters incorporate a filtering of acoustic signals according to frequency This filtering weighting type is devised to Page 18 MPAA1 USER S MANUAL
8. finished you may begin to operate MPAA1 by moving the cursor of the mouse and clip the MENU on the PC screen to enter into each menu and sub menus Now that MPAA 1 is operating simultaneously with the PC The function being activated will show both on MPAA1 and on PC Go to FILE and clip on OFF LINE if you need to disable ON LINE operation Once the procedures are done you should be able to proceed with the following functions PRINT 1 Go to FILE select Print and a printer selection window will appear Select a printer from the list Select all data or one of the 16 memories Select the quality level Draft Low quality Medium quality or High quality Clip on Print and the printer window will disappear as soon as the transmission is complete ATTENTIONS Along with the 31 band value of the selected memory and the EQ SETTING value the name of the file date of printing LEVEL RANGE WEIGHTING and maximum level will also be printed on the data sheet SAVE FILE 1 2 MPAA1 USER S MANUAL Go to FILE select Save File Select an desired directory or a new destination and give a name to that file Clip on SAVE to save the file and all 16 memories will be saved under that one file name THE T METER CORPORATION the t meter BACK LIGHT Clip on LIGHT to activate the back light for MPAA1 clip again to turn it off PEAK HOLD 1 Clip on ON to view the peak value of each frequency and all frequency Th
9. jun 28 2005 Page 3 INTRODUCTION the t meter INTRODUCTION Hello Thank you for purchasing MPAA1 Personal Audio Assistant A super accurate audio analyzer that nestles in the palm of your hand giving you all the tools you need to set up any sound system With 31 band real time spectrum analysis SPL and dBu dBV line voltage measurement EQ setting and phase checking it is very sound engineer s best partner This personal audio assistant is battery powered 4 AA size to allow for ultimate portability Compared to all other audio analyzers it is far more portable while insists the same level of accuracy With MPAA conquer all acoustic environments with precision and ease The T Meter understands the importance of sound reproduction management As a professional naturally you care a lot about the sound quality With an audio tool like MPAA you are given a ruler to obtain proper measurements of sound to assure quality sound that every best professional sound engineers dream of This is an extremely precise means for you to gather all the useful data to sharpen your decision in making any necessary adjustment change or modification required for any system setup and or arrangement The T Meter also realizes that you guys out there want useful audio tool with easy and convenient operation MPAA 1 is designed exactly with that kind of concept Its functions can easily be accessed through both of its jog control and function
10. 50 ms 1 sec MPAA1 USER S MANUAL Page 27 SPECIFICATIONS Other function Memory Average calculation EQ setting value display Phase checker Transimission Noise generator Based on 6VDC power source Pink noise 1K Hz Signal Polarity Signal Power Source the t meter 10 RTA 6 average calculation For 10 RTA 31 band Through polarity signal Simultaneous operation with PC or laptop through RS 232 Balanced output 10dBu Balanced output 10dBu Balanced output 10dBu 4XAA battery battery life 4hrs with alkaline battery or external 6 VDC adapter Dimensions H W D 144 95X82 95X39 42mm 5 7 X3 26 X1 55 Weight w battery 340 g 0 74lbs Page 28 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter 26 AUDIO TEST SIGNALS The following is the list of the audio test signals on the CD included in the MPAA1 gift box 1 Pink noise 10 dBu 60 seconds 2 Polarity testing signal 3 White noise 10dBu 60 seconds 4 250Hz sine signal 10 dBu 30 seconds 5 500HZ sine signal 10 dBu 30 seconds 6 1KHz sine signal 10 dBu 30 seconds T 2KHz sine signal 10 dBu 30 seconds 8 5KHZz sine signal 10 dBu 30 seconds 9 10KHz sine signal 10 dBu 30 seconds 10 12 5KHz sine signal 10 dBu 30 seconds 11 Sweep frequency up 20Hz 20KHz 1 0 dBu 5 seconds for each frequency 20Hz 25Hz 31 5Hz 40Hz 50Hz 63Hz 80Hz 100Hz 125Hz 160Hz 200Hz 250Hz 315Hz 400Hz 500Hz
11. UAL THE T METER CORPORATION the t meter CONTENTS IntrodUCtiON seeren erea nET EREEREER REEERE 4 POA CS iinisesannicedanmosingeeinennmenniaresdaptrignansediniunas 5 Meau IGE ccesas cannabis vie na vcubadeahusunaeonenaihomeinanieasaans 6 Inside the gift DOK ccc ccasistinensenorcaraeiinirennataronnantons 7 Meet your new best friend MPAA1 c080 8 Getting STAINS niiarweunrnonenerencniasenuasabeaneantwenvadens 11 Operation TDS isos dtinannencesdielasdununsiuceenuenedineiiawnens 12 RTA Real Time AnalyZer ccccseceeceeneeeeeees 13 SPL Sound Pressure Level ccscceeeeeeeees 14 Ft IN sdcerseadasnnsacscauassoacenenetsneserceauecseeeeas 14 Line Voltage Measurement cccccceceeseeeeeens 15 MEHIONY ciacoaxnneniorsehanemeutauaiegtiunaneeabarvenetesaans 16 SEUNG ai e E E EE 18 Phase CHECK iviceuaramataduisanenseiieanmannoranatombsonsieds 22 Generato acacnnrndirsdananiviabadmavbunieraouiansdunumncunauens 23 Power Oilicsscriuradaniorusnan brewiundandaricnwiiussaasaebanks 23 Simultaneous Operation With PC 0 24 DIMENSIONS i acnsaedasoncaediueeennnekaontaneresionnenaaretanenns 26 DUCE CAMO oisnnunnetlassuandabanncuedscsaunenensdanonatinanss 27 Appendix List of 26 Testing Signals 29 CONTENTS THE T METER reserves the right to improve or alter any information supplied within this document without prior notice THE T METER CORPORATION MPAA1 USER S MANUAL V1 1
12. asure line level in dBu dBV or AC voltage for THE T METER CORPORATION MPAA1 USER S MANUAL MEET YOUR NEW BEST FRIEND MPAA1 balanced unbalanced signal or to check the phase of the input signal Do not send in DC voltage via this connector into MPAA it will cause permanent damage to the unit 11 12 11 Contrast control By adjusting this control user can get better resolution from LCD when needed 12 Power luck Set this switch at the ON position before turn on MPAA1 Set it at other side to prevent battery from losing power by accidentally pressing the POWER ON switch in the front It is recommended to set this switch off when you will not be using MPAA1 for a long time Page 9 MEET YOUR NEW BEST FRIEND MPAA1 14 15 13 Measurement Microphone Turn this accurate built in Omni directional mic to operation position stands 45 degree by pressing it s axis base in the first place Always press the axis base before relocating the mic Do not turn the mic without first pressing the axis base it may damage the microphone and cause malfunction in MPAA 14 Stand Mount A stand mount locates in the back for connection of a tripod or any other stand that has a standard 6 20 connecting screw often found on camera tripods 15 Battery Holder MPAA needs four AA batteries for operation Alkaline battery isrecommended for maximum operatio
13. ave the measurement data and function setting into the memory of MPAA1 Always prepare extra batteries or external 6V DC power to ensure the accuracy of the measurement It is not recommended to continue using MPAA for any measurement when the battery is low MPAA1 USER S MANUAL measurement is still accurate unless CLIPPING has appeared in the LEVEL box during the measurement When clipping shows reset the level range Turn on backlight only when the level range is set at 70 130 dB SPL or 20 40dBu Anoise would occur when turing on the backlight which may affect the result of the measurement in the lower range ATTENTION When the battery is low a blinking battery icon BATTERY LOW will appear at the WEIGHT box and last for 3 minutes on the screen to remind user of replacing the batteries Low quality batteries may casue direct shut down without any warning An enlarged blinking battery icon will again appear in the center of the LCD screen if user restarts the MPAA1 without replacing the battery or with insufficient battery power THE T METER CORPORATION the t meter ACOUSTIC ANALYSIS FUNCTIONS The following section illustrates how to use MPAA1 to measure SPL level and many others useful information for acoustic analysis RTA Real Time Analyzer RANGE WEIGHT MAX 50 110SPLE A fF 105 5 1K 102 8
14. button in the front So turn on your new audio assistant and let the adventure begin We are confident you will find this MPAA really pays off To help you get familiar with your MPAA this manual includes instructions on each function from the main menu and the sub menus Let them guide you and get you familiar with this handy device Page 4 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter THE T METER CORPORATION FEATURES Personal Audio Assistant Palm Size Audio Analyzer 31 band Real Time Spectrum Analyzer Built in calibrated measurement microphone Sound Pressure Level Meter from 30dB 130dB Line signal measurement display in dBu dBV or Voltage A C weighting or flat 3 level range selection for dB SPL and line signal Line signal measuring range dBu 50 40dBu dBV 52 38dBV Volts 5mV 80V Maximum level display Peak hold display 4 standard response time 35ms 125ms F 250ms M 1sec S 10 memories for measurement and 6 for average calculation 31 band EQ setting level display boost cut 160 x 160 graphic display with back light and contrast adjustment Phase checker Calibration through sound level calibrator eg B amp K Type 4231 Noise generator with pink noise 1K Hz and polarity test signal balanced output Low power consumption over 4 hours continuous operation with 4 AA size alkaline batteries Adapter power supply operation available When power is from adapter
15. d shown constantly on the LCD screen Itis recommended to reset the max level before each new measurement Procedures 1 2 Go to the SETTING MAX LEVEL menu High lighten RESET and press ENTER button to restart a new max level measurement and display The menu will automatically return to the SETTING sub menu Or press ESC to return if it you do not intend to reset A new max level display will be shown in the MAX column three seconds after returning to the RTA operation THE T METER CORPORATION MPAA1 USER S MANUAL Page 19 SETTING PEAK HOLD SETTING v PEAKHOLD vV ON VA OFF ESC i lA 100 815 4K 3 15K 10K Peak hold of the selected unit being measured could also be shown constantly on the LCD screen It tells you the peak value of each frequency and all frequency in RTA mode Procedures 1 Go to the SETTING PEAK HOLD menu 2 High lightened ON to activate peak hold display 3 High lightened OFF to cancel peak hold display 4 Or press ESC to return ATTENTION When saving the memory with PEAK HOLD on the peak level can only be seen when user recall that memory when the PEAK HOLD setting is on By setting the PEAK HOLD off user may see the level in each frequency and all frequency instead of the peak value the t meter RESPONSE TIME SETTING v RESP TIME Vv 35 ms 125 m
16. d by the temperatures and the size of the crowds at the time you did the measurement LINE VOLTAGE MEASUREMENT RANGE WEIGHT MAX 20 40 dBu FLAT A 3 Measure the line voltage level in units of dBu dBV and voltage using standard response time and standard A C and flat weighting network Under normal condition please set it at Flat MPAA1 can only measure AC voltage if user measure DC voltage with MPAA1 it may damage MPAA1 and hence void the warranty Procedures 1 Go to the SPL LINE menu and set the measurement unit at dBu dBV or voltage 2 Go to the SETTING LEVEL RANGE menu and choose an appropriate range The THE T METER CORPORATION MPAA1 USER S MANUAL LINE VOLTAGE MEASUREMENT selected range will also show under the topic of RANGE 3 Go to the SETTING WEIGHTING menu and set a desired weighting For more information please refer to WEIGHTING The selected range will also show under the topic of WEIGHT Normally FLAT is used to measure line voltage 4 Go to the SETTING RESP TIME menu and select an appropriate response time for the measurement 5 Go to the SETTING MAX LEVEL menu and reset the maximum level reading at the right top corner if it is needed 6 Go back to RTA display you can read out the level for each frequency or all frequency Press ENTER button or the jog con
17. e level can be found either from the bar meter or in the memory chart 2 Clip on OFF to view the RTA value of each frequenBy and all frequency a MEMORY from the memory chart Clip on one of the memory number 1 10 or A F the number of selected memory would be marked in the AN oy chart to view the level in each frequency and all frequency User can clip on the bar meter in the spectrum to see a specific frequency for readout or view them in the RTA Value column ATTENTIONS memory by double clipping the number of the memory User may rename every in the memory chart The following functions along with PORT are not accessible during on line OPEN FILE 1 Go to FILE select Open File 2 Locate the file previously saved in your PC and double clip it 3 The data is now available for further operation MEMORY from the menu AVERAGE 1 Go to MEMORY AVERAGE and activate average function 2 Choose by clipping memory 1 10 for average calculation The original setting of each memory level range will display next to its number THE T METER CORPORATION B MPAA1 USER S MANUAL SIMULTANEOUS OPERATION WITH PC Clip on AVG to run the calculation Select a memory from A F and clip on Save to save the result the old one will be over written or clip on Cancel to exit User can view the result either in graphic or in text immediately both in result box or in the memory chart with level range displayed at the
18. el reading at the right top corner if it is needed Go back to RTAdisplay and press ENTER button or the jog control for two seconds to enter SPL meter the t meter Graphic shown means a all frequency level of 95 4 dB SPL under the level range of 50 110SPL A weighting is being read EQ SETTING 1K 5 2 Hz dB ESC Essential for every sound engineer and his graphic equalizer EQ setting will vary from one acoustic space to another The ultimate goal is to create an ideally flat response for the system and eliminate every possible feedback With STORE AVERAGE and EQ SETTING functions MPAA1 will help you accomplish the task and achieve the goal in no time Procedures 1 Run MPAA1 in RTA mode 2 Play back pink noise from the included CD or from the MPAA1 GENERATOR tool through the system 3 Pick up two or more significant locations spots among the audience then do the measurement and save the RTA curve into the memory of MPAA1 4 Go to the MEMORY AVERAGE menu select the memory measured from those locations and do MPAA1 USER S MANUAL THE T METER CORPORATION the t meter the average calculation 5 Go to the MEMORY EQ SETTING menu you can find out how much dB you need to boost or cut in each center frequency by scrolling jog control or the UP DOWN buttons Example shown means user should cut 5 2 dB at 1K Hz ATTENTION The average RTA curve is limite
19. ely displays the level The graphic shown means user has set the level range at 50 110 SPL A weighting And the max level during the time of measurement is 105 5 dB Also user is reading at 1K Hz which has a dB SPL of 102 8 If you would like to store the measurement data into the momory of MPAA1 go to the STORE menu This is only available when measuring the SPL User can also save the measured spectrum data into one of the ten memories Please refer to MEMORY STORE for more information Page 13 SPL SOUND PRESSURE LEVEL METER SPL Sound Pressure Level RANGE WEIGHT MAX 50 110 SPL o Mhhh E 35 4 de Measure the loudness of the ambient sound level in units of dB SPL This is a true RMS measurement using standard display time average and standard A C and Flat weighting network Procedures 1 Page 14 Go to the SPL LINE menu and set the measurement unit at SPL Go to the SETTING LEVEL RANGE menu and choose an appropriate range The selected range will also show under the topic of RANGE Go to the SETTING WEIGHTING menu and set a desired weighting For more information please refer to WEIGHTING The selected weighting will display under the topic of WEIGHT Go to the SETTING RESP TIME menu and select an appropriate response time for the measurement Normally it is set at 125ms M Go to the SETTING MAX LEVEL menu and reset the maximum lev
20. er than the current level range setting of the MPAA1 therefore can not be detected by MPAA1 For speaker wiring 1 Go to the SETTING LEVEL RANGE menu and select the high 70 130dB range for phase checking The low range 30 90dB is not recommended for phase checking because the environment noise is normally louder and very much likely will affect the result 2 Go to the GENERATOR menu then select POLARITY or play the included CD to send out polarity signal through that speaker 3 Stand one meter away in front of the speaker that plays out the polarity signal and go to the PHASE CHECK menu and activate it 4 A big means the speaker is in phase and the wiring is correct 5 A big means the speaker is out of phase and the wiring of the sopeaker is not correct 6 A big or a screen swfiting between and means the sound pressure level is not strong enough to be detected N ATTENTION Make sure the sound pressure level of the polarity signal from the system is louder than the envirnoment noise otherwise MPAA1 will not be able to detect the phase of the speaker Page 22 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter GENERATOR POWER OFF GENERATOR POWER OFF GENERATOR POWER Vv PINK NOISE MANUAL OFF POLARITY OFF 1K Hz ESC ESc 4d 100 315 AK B 15K TOK 100 815 1K 3 15K 10K Al B1
21. ess to most of the functions in MPAA1 Scroll up and down the main and sub menus with it and press the jog control to get into the main menu or sub menu Then scroll it to high lighten a function or item you want press it to activate or execute the function Of course you can also use the three function buttons the above mentioned button 3 5 to execute Page 8 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter Scroll it to move cursor and press it to execute or activate the high lightened function 7 6V DC Power Input Via this input user may connect power adaptor to MPAA1 The power of the battery would be replaced immediately as soon as the adaptor power is being plugged in ATTENTION Always use the adapter included in this gift box to ensure measurement accuracy and avoid damaging MPAA1 8 PC Serial Interface port 3 50 mini jack allows user to connect MPAA1 to PC with the D SUB 9 PIN female connector via the PC serial port for simultaneous operation with PC Please see SIMUTANEOUS OPERATION with PC for more inforamtion 10 9 9 Line output XLR male socket Through this XLR male connector user can send out the three built in audio test signals pink noise 1k Hz tone and polarity signal The output level is balanced 10dBu under 6DV power supply 10 Line input XLR female socket This port allows you to send balanced line level input to MPAA1 via an XLR jack This signal input allows you to me
22. g the measurement Procedures 1 Go to the MEMORY menu and select RECALL Select the already saved data from 1 10 or A F and press YES Each value will be displayed the way you will see in VALUE in 31 band center frequency plus a all frequency value When you see a flashing ESC in the Hz column press ENTER to return to the MEMORY menu Page 16 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter MEMORY AVERAGE 5 Press RUN and MPAA1 will automactically do the average calculation or press ESC to return to cancel MEMORY v 6 After you run the average calculation select N RA from A F and press YES to save the result 1 5 9 into that memory when COMPLETE is F a in shown on the screen The previous 4 8 A saved data at the same time will be over ESC lt written MPAA1 will automatically go to EQ I SETTING menu as soon as calculation is A BI 000 815 K 3 15K 10K doned Example shown means the user has selected memory 1 3 and 6 for average User can choose from memory 1 10 to do the average calculation calculations which is essential for EQ setting Procedures ATTENTION Selecting memories with 1 Go To thie MEMORY MENU ANd Selec different weighting setting to proceed average AVERAGE function is not recommended MPAA1 will ignore 2 Select the data with any combination from the peak value when doing
23. he DOWN button each time will decrease by 0 1 dB You need to keep adjusting untill the readout of the MPAA1 THE T METER CORPORATION MPAA1 USER S MANUAL SETTING is indentical with the one of the standard SPL clibrator 6 Press the ENTER button to exit to complete the calibration to return to RTA display ATTENTION 1 Under normal operation you may never need to calibrate your MPAA1 2 If you want to cancel calibration functon just press the ENTER button to exit before making any adjustment 3 If you want to restore the default setting simply use the UP DOWN buttons to adjust the OFFSET value untill it reads 0 0 dB and then press the ENTER button to complete setting Page 21 PHASE CHECK PHASE CHECK PHASE CHECK IN PHASE PHASE CHECK OUT OF PHASE PHASE CHECK Measure the phase of an electrical signal or speaker wiring in order to find out if signal phase or the speaker wiring is correct Polarity signal is usually needed for checking the speak wiring Procedures For electrical signal 1 Go to the SPL LINE and select dBu the t meter 2 Go to the SETTING LEVEL RANGE menu and select an appropriate range for phase checking 3 Send the electrical signal to the female XLR input jack A big means the signal is in phase 5 A big mans the signal is out of phase 6 Abig means that the signal level is low
24. ls and software for operation with PC 1x User s Manual MPAA Den eae ee ez gt P AA Size Batteries THE T METER CORPORATION INSIDE THE GIFT BOX PC Serial Interface Cable AC Power Adaptor CD ROM the t meter User s Manual MPAA1 USER S MANUAL Page 7 MEET YOUR NEW BEST FRIEND MPAA1 ZE MULTI PURPOSE AUDIO ASSISTANT 4 3 MEET YOUR NEW BEST FRIEND MPAA 1 MPAA1 comes with the following button control and connections 1 LCD Display 160x160 graphic LCD screen provides clear and large display 2 Power On button Press this button for 2 seconds to turn on the power After the power is on user can also activate or turn off the backlight for LCD display with this button Before turning on the power please make sure the POWER LUCK switch in the back is set at the ON position 3 Right Down button Press this button to move the high lightened text down or to the right in the function menu the t meter 4 Left Up button Press this button to move the high lightened text up or to the left in the function menu 5 Enter button Press this button to move from Real Time Spectrum Analyzer RTA display to FUNCTION MENU After moving the cursor to a desired function in the menu by RIGHT DOWN and LEFT UP buttons press this button to start or activate that function 6 Jog Control Jog control on the left hand side of this unit provides acc
25. n duration Under normal operation without turning on back light and using noise generator MPAA has over four hours of continuous operation with alkaline battery Page 10 MPAA1 USER S MANUAL the t meter THE T METER CORPORATION the t meter GETTING STARTED 1 Open the battery cover and insert four AA batteries or simply plug in the 6 volt DC power adaptor to the power input When adapter is plugged in the battery power will be replaced by the adaptor ATTENTION Use only the adapter included in this gift box to ensure the measurement accuracy and avoid demaging MPAA1 If you want to use the adaptor make sure to turn off the battery power first to prevent MPAA 1 from restarting again Suddenly unplug the adaptor power may casue crash down for system you may restore MPAA by resetting the power lock 2 Position the mic for operation by pressing the axis base of the built in mic and turning it all the way up until the mic stands 45 degree if you want to measure sound pressure level or acoustic power 3 Set the POWER LOCK inthe back to the ON position 4 Press the power on button in the front for two seconds to turn on the power THE T METER CORPORATION 5 MPAA1 USER S MANUAL GETTING STARTED A startup screen will show for about 10 seconds then the real time spectrum analyzer with 31 band will appear on the screen Three types of display Level ange weighting t
26. ndividual By connecting MPAA to the PC user may also proceed with data saving and printing The software supported by Windows 98 and above can be found in the included CD which also contains 26 testing signals ATTENTION When engaging simultaneous operation with PC only the mouse and its keys are functional and it s recommended to use the adapter instead of battery Also please position MPAA well before engaging remote control Procedures for installation and simultaneous operation 1 Turn on the PC and insert the CD 2 Find setup exe and double clip it to begin installation by following the instruction 3 Go to start menu and select MPAA1 ON LINE the window of MPAA1 ON LINE SOFTWARE would appear on the screen 4 Connect MPAA1 to PC via RS232 cable through the serial port and then turn on MPAA1 5 Go to FILE select ON LINE to activate simultaneous operation If you cannot execute ON LINE please go to OPTION PORT select a COM number and run TEST The software will then automatically detect the current serial port connecting to MPAA1 and save the setting The data previously saved in MPAA1 will immediately be uploaded and the indication at the right bottom corner will change from Off Line to On Line If no data is saved in the memory of MPAA it will show a primitive level of 85dB for each frequency and all frequency in FLAT with a level range of 30 90 dB SPL Page 24 the t meter As soon as uploading is
27. s F I 1 sec S Timm ll A 100 815 AKI 3 15K 10K For different kinds of measuring purpose different setting of response time is needed for the measurement 35 ms Extremely Fast for explosive sound 125 ms F Fast 250 ms M Middle 1 sec S Slow Procedures 1 Go to the SETTING RESP TIME menu and select an appropriate response time and press ENTER button 2 Or press ESC to return Page 20 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter CALIBRATION Under normal operation you may never need to calibrate your MPAA1 By using sound level calibrator with 1 2 diameter adapter that sends out 1K Hz tone anyone can do calibration for MPAA1 and regain accurate sound pressure level measurement Calibration should be done as long as strange measurement data appears or abnormal operation occurs User can use a B amp K TYPE 4231 sound level calibrator to do the calibration Procedures 1 Go to SETTING PEAK HOLD and set it at OFF 2 Go to SETTING RESP TIME and set it at 250ms M 3 Place a sound level calibrator with a microphone connector of 1 2 diameter tightly to the microphone of MPAA 4 Go to the SETTING CALIBRATION menu and activate the function 5 Adjust the level measured from the SPL calibrator by pressing UP DOWN buttons till it reaches that of the sound level calibrator Pressing the UP button each time will increase the value by 0 1dB pressing t
28. top EQ SETTING 1 Select a memory 1 10 or A F with which you would like to adjust the EQ 2 Go to MEMORY and activate EQ setting function 3 Move the cursor and clip on each bar meter to find out how much dB you need to cut or boost for each center frequency CLEAR 1 Go to MEMORY CLEAR 2 Select one memory 1 10 or A F from the sub menu and the memory will be deleted immediately select All if you need to delete all the memories that are presently loaded into PG Page 25 DIMENSIONS the t meter DIMENSIONS a 82 95 3 26 _ ee d l 144 95 5 70 39 42 1 55 Dimensions are showen in mm inches Page 26 MPAA1 USER S MANUAL THE T METER CORPORATION the t meter Input Output Microphone Line Data Port Display SPL dBu dBV Voltage RTA Measurement Range SPL Microphone input dBu Line input dBV Line Input Volatge Line Input Setting Weighting Peak hold Maximum level display Response time THE T METER CORPORATION SPECIFICATIONS Built in miniature omni direction condenser microphone XLR jacks for line input and output 3 5mm mini stereo phone jack for RS232 160X160 LCD screen with contrast adjustment and back light Barograph and digit display 31 band 0 5dB resolution Center frequencies ISO standard from 20Hz to 20KHz 30 to 130 dB SPL 50 to 40 dBu 52 to 38 dBV 5 mV to 80 V A C or Flat ON OFF RESET 35 ms 125 ms 2
29. trol for two seconds to enter line voltage level meter if only all frequency readout and a fairly larger one is needed master level ATTENTION 1 If the level is lower than 127mV when measuring voltage MPAA1 will show it in mV If it is higher than 127mvV the data will be shown in voltage instead For example 120mV will read like 120 0mV and 200mV will be shown as 0 2V 2 The measurement for line voltage can not be saved into the memory of MPAA1 Page 15 MEMORY MEMORY The sub menus of MEMORY includes STORE RECALL AVERAGE EQ SETTING STORE MEMORY v STORE v 10K User can save up to 10 set of measured data as well as 6 other averaged one into the memory of MPAA 1 for further analysis or uploading Procedures after RTA measurement is complete 1 Go to the MEMORY menu and select STORE 2 Select a number from 1 10 and press YES 3 When cursor automatically moves to ESC it means MPAA 71 has finished saving the data The previous saved data at the same time will be over written ATTENTION This function is only available when in RTA mode the t meter RECALL MEMORY RECALL TM OO User can recall all the data saved in the memory of MPAA1 to make comparison or and see the difference between amon
30. ype and max level are constantly shown at the top of the screen in RTA mode If you need backlight for your operation simply press the power on button to activate it press again to turn the backlight off Use the ENTER UP RIGHT and DOWN LEFT buttons to read out the level of each 31 band frequency and all frequency in real time or to navigate through the main and sub menus Press the ENTER button to enter the main menu and select a function by using the UP RIGHT and DOWN LEFT buttons then press ENTER again to activate the high lightened function or enter into the sub menus User may also use the jog control to complete all the functuions Page 11 OPERATION TIPS the t meter OPERATION TIPS 1 All the function can be activated by operating 7 When the result is above the level range the Page 12 ENTER LEFT UP and DOWN RIGHT buttons or by the jog control It is recommended to use these three buttons when taking low SPL measurement Press ENTER button when the ESC Escape is high lightened in most of the function menus would allow you to exit the main menus or the sub menus Press and hold the ENTER button or jog control for 2 seconds in most of the function menus to return to the real time spectrum analyzer Press the jog control or ENTER button for 2 seconds to jump to SPL Line level meter enlarged readout in RTA mode Always turn off the power by going to the POWER menu and select OFF if you wish to s
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