Manual - NTi Audio
Contents
1. 25 mV to0 5V 23 0 5 dB 0 5 dB lt 72 dB 0 025 typical 6 dBu 1 kHz lt 55 dB 0 18 or 0 1mV 20 Hz 20kHz 20 Hz 20 kHz Crest factor 2 12 20 Hz 20 kHz Crest factor 3 27 200 ohm balanced amp unbalanced 10 30 60 minutes or OFF 2 x 1 5 V Dry or NiCd type cell LR 6 AA AM3 types Typical battery lifetime gt 20 hours 0 to 45 C 32 F to 113 F lt 90 R H non condensing 140 x 74 x 25 mm 5 5 x 2 9 x 1 170 g 6 oz including batteries 18 Quick Guide Minirator MR1 MODE On Off 2 sec Select with Select with MODE i Frequency 76 dBu 6 dBu vita 20 Hz 20 kHz Sine Sweep White Pink Noise JE JE B Square Polaritytest dBu dBV V 10 min 30 min 60 min off afl gt I gt id Powersave2. longer cables Balanced connections have the advantage of a far better noise and hum immunity Unbalanced connections are advised if the input of the device is unbalanced such as inputs of HiFi amplifiers and low cost mixers 15 Basic Operation b RCA Output The RCA also called phono con nector or cinch connector is located on the top of the instrument see Fig 9 It provides the selected output signal in an unbalanced mode with a nominal output impedance of 200 ohm The center pin carries the signal hot and the screen is the ground The RCA output is always active regardless of the XLR connectors position Fig 9 RCA output c XLR Output The XLR output is a balanced signal output with nominal 200 ohm output impedance see Fig 10 The XLR pins are retractable in order to protect the pins from inadvertent con nections and short circuits To flip the connector out push the release button and turn the XLR output whilst pressing For example press a finger into the notch on the rotator see Fig 11 To retract the pins simply press again the release button and turn the pins back Fig 10 XLR output Fig 11 Open the XLR output 16 Basic Operation The XLR pin assignment see Fig 12 is internationally standardized Pin 2 gold Pin 1 silver Pin 3 gold Fig 12 Pin assignment e Pin 1 silver plated left hand side is connected to the cable screen only and is the reference for pin 2 and pin 3 wit
3. MINIRATOR MR1 Analog Audio Generator Less noise More sound User HETT ET NTI CONTACT NTI AG Im alten Riet 102 9494 Schaan Liechtenstein Europe Tel 423 239 6060 Fax 423 239 6089 E mail info nt instruments com Home www nt instruments com NTI AG All rights reserved Subject to change without notice Release 2 01 Aug 2005 Minirator amp Minstruments are registered trademarks of NTI 2 TABLE OF CONTENT 1 Introduction 4 CE Declaration of Conformity 4 International Warranty amp Repair 5 Warnings 6 Overview 7 Test Certificate 7 Battery Replacement 8 2 Basic Operation 89 Getting Started 10 Power On Off Low Battery 10 Choose Waveform 12 Change Frequency 13 Change RMS Level 13 Setup Display 14 Connections 15 3 TECHNICAL SPECIFICATION 18 Introduction 1 INTRODUCTION Congratulations and thank you for buying NTI s Minirator MR1 a product specially suited for professional audio appli cations We are convinced you will enjoy using it NTI products are manufactured in compliance with the high est quality standards and marked with the CE sign In order to avoid any damage to the unit we strongly re commend to read the entire manual before you start using the instrument CE Declaration of Conformity We the manufacturer NTIAG Im alten Riet 102 9494 Schaan Liechtenstein Europe hereby declare that the product Minirator MR1 released in 1998 conforms to the following sta
4. cturer s specifications We recommend to calibrate and adjust the Minirator MR1 in one 1 yearly intervals Introduction Battery Replacement After unpacking insert two batteries into the battery compartment Hinge out the XLR connector by pres sing the thumb on the release button Turn out the gripped plu until it aie FE Fig 1 Insertion of batteries open position Open the battery compartment flap with your fingernails or any appropriate tool Insert two 1 5 V AA size alkaline batteries as shown in Fig 1 The direction is labeled on the rear side of the instrument Close the battery compartment flap Notes We do not recommend to use NiCd or NiMh rechargeable batteries Do not insert batteries of different types Note the correct polarities of the inserted batteries Wrongly polarized batteries may cause permanent damages to the electronics inside Remove the batteries as soon as they are flat Basic Operation 2 BASIC OPERATION RCA Cinch output unba LC Display lanced Down Up button button for for parameter parameter settings settings Retractable XLR output MODE button push connector balanced once to switch on Press Push the release button to toggle to the next para and turn to fold out Push meter Press and hold for and turn to retract 2 sec to switch off Fig 2 Instrument overview Basic Operation Getting Started For better understanding the word
5. ely active The default unit is dBu Available settings Volts V logarithmic level dB Volts dBV logarithmic level dB unit dBu 14 Basic Operation c Change Sweep Speed In the sweep mode the MR1 automatically sweeps through the audio band by stepping through all the available 1 3 octave frequencies as per Table 2 The user may define the sweep speed by setting the duration of each frequency To alter the sweep speed select the H sign with the MODE key and toggle through the available settings using the UP or DOWN key Available sweep increment settings 50 milliseconds 50m 500 milliseconds 5s 1 second 1s 2 3 4 and 5 seconds The new sweep speed is immediately active At the begin ning of each cycle a 1kHz start tone remains active twice as long as the step duration defined A running sweep is indicated by a rotating bar in top right corner of the signal parameter screen Connections Minirator features two output connectors an unbalanced RCA Cinch or Phono plug output and a balanced ground free XLR connector The RCA output is permanently active whilst the XLR pins are only connected in the folded out position Note e Never connect both outputs simultaneously it may cause short circuits a Balanced Unbalanced Connections Use balanced connections via the retractable XLR output pins whenever a balanced input is available especially for low level input signals such as microphone inputs and for
6. h balanced loads Pin 2 gold plated right hand side provides the signal with positive polarity e Pin 3 gold plated center provides the signal with nega tive polarity The difference of the signals pin2 pin3 results in the ba lanced signal of doubled amplitude see below Fig 13 Each of the semi outputs has a source impedance of 100 ohm corresponding to 200 ohm in balanced mode Sara 2 balanced o via ZN N A Sy K 1 JER o Signal 3 1 unbalanced ro V 7 A ta ATEN uij N i NEB LV 3 F o Balanced Amplifier Fig 13 Balanced output diagram 17 Technical Specification 3 TECHNICAL SPECIFICATION Outputs Waveforms Frequency Range Frequency Sweep Sweep Speed Units Level Ranges Flatness Accuracy THD N White Noise Pink Noise Output Impedance Auto Power Off Batteries Lifetime Temp Range Humidity Dimensions Weight Balanced XLR unbalanced RCA phantom power resistant Sinusoidal Square White Noise Pink Noise Polarity 20 Hz 20 kHz in 31 steps Sine 20 Hz 5 kHz in 25 steps Square 20 Hz 20 kHz with sinusoidal signals 0 05 0 5 1 2 3 4 5 sec per step dBu dBV V selectable Waveform Range Inc Sine Square 76 dBu to 6 dBu 2 dBu White Noise 78 dBV to 4 dBV 2dBV Sweep 0 13mV to 1 6V 23 Pol Test 76 dBu to 4 dBu 2 dBu 78 dBV to 2 dBV 2dBV 0 13 mV to 1 25V 23 Pink Noise 56 dBu to 4 dBu 2 dBu 58 dBV to 6 dBV 2dBV 1
7. hange RMS Level To change the level of the generated signal toggle with the MODE key until the El character is flashing and increase or decrease the level with the UP or DOWN key Sine Square 76 dBu 6 dBu White Noise 78 dBV 4 dBV Sweep 0 13 mV 1 6 V Pol Test 76 dBu 4 dBu 78 dBV 2 dBV 0 13 mV 1 25 V Pink Noise 56 dBu 4 dBu 58 dBV 6 dBV 1 25 mV 500 mV Table 3 Level ranges and increments for signals and units 13 Basic Operation Setup Display Selectthe son gypsaveri nin G Press the DOWN key fnit dBu Bur is to reach the setup screen Fig 8 Setup display To revert to the signal parameter screen select the i sign and press the UP key a Define the Auto Power Off Time Minirator features an auto power off function switching the instrument off after a certain period of no key press The default setting is 10 minutes To alter the auto power off time select with the MODE key the IP sign Pwrsave The power off time may be decreased by using the DOWN key or increased with the UP key and is immediately active Available settings 10 minutes 10min 30 minutes 30min 60 minutes 60min and OFF Off In the OFF mode the instrument remains active until the batteries are flat by not switching off the MR1 manually b Change Level Units Select the m sign with the MODE key and toggle through the available units using the UP or DOWN key The new unit is immediat
8. kind expressed or implied in law or in fact including without limitation merchandi sing or fitting for any particular purpose and assumes no liability either in tort strict liability contract or warranty for products Repair of your Minirator MR1 In case of malfunction take or ship prepaid your NTI Minirator packed in the original box to the authorized NTI representative in your country For contact details please see the NTI web page www nt instruments 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 and damages follow the rules listed below Read this manual thoroughly before you operate the instrument for the first time e Use the instrument for the intended purpose only Never connect the instrument to a voltage output such as a power amplifier mains power plug etc Do not disassemble the instrument Never use the instrument in a damp environment 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 Before you connect the Minirator to an input verify that level and frequency are in an acceptable range for the device Line signals such as guitar inputs may only be operated to a max level of 500 mV 6 dBV suitable frequency for a first test is around 1 kHz If you have headphones or louds
9. meter screen i the waveform frequency Gursave l Bmin D and level may be altered Onit dBu Buri 3s The setup screen allows Fig 6 Setup display the change of setup para meters By selecting the arrow symbol in the right top corner and pressing the corresponding arrow key you may switch from one to the other screen After initialization the instrument will re enter the last active status prior switching off the last time To re enter factory settings as shown in Fig 5 and Fig 6 switch the Minirator MR1 on with pressing the UP and MODE key simultaneously Keypad HisnalrSine D G S Hz OD 6dBu The Minirator has only Fig 7 Selectable items two basic rules Each time you press the MODE key you will move to the next selectable item The currently selected item is indicated by a flashing inverted first character In Fig 7 the letter i is selected represented graphically by gray color To alter the parameter use the UP and DOWN keys The changed parameter becomes immediately effective The signal setting cycles through the available values while amplitude and frequency stop at their maximum and minimum values MODE UP and DOWN key provide a repeat function if you keep them pressed 11 Basic Operation Choose Waveform Select the E sign with the MODE key and toggle through the available waveforms using the UP or DOWN key The available waveforms are listed in below Table 1 Sine 20 Hz Pure low distortion
10. ndards or other normative documents EMC Directives 89 336 92 31 93 68 Harmonized Standards EN55103 1 EN55103 2 This declaration becomes void in case of any changes on the product without written authorization by NTI Date 1 4 2000 eit Signature Cbs Position of Signatory CEO Introduction International Warranty amp Repair International Warranty NTI guarantees the Minirator 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 ac cidents 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 service center or if the instrument has been opened in a manner other than specified in this manual No other warranty written or verbal is authorized by NTI Except as otherwise stated in this warranty NTI makes no representation or warranty of any
11. peakers connected make sure that the volume control is set to a very low level to avoid damages to speakers or ears Microphone inputs require low levels of approx 1 mV only Make sure that the level is set accordingly before you connect the Minirator to such inputs Very low and very high frequency signals at high levels may cause damages to the input of the device under test High sound pressure levels can cause permanent damages to your hearing system Make sure that all faders of the mixing console are set to minimum to avoid overloading inputs or giving very loud levels Introduction Overview The Minirator MR1 is the first member of a family of miniaturized battery powered audio instruments called Minstruments It is a professional multifunctional analog audio signal generator that fits in the palm of your hand It covers most of the typical test signals used in a professional audio environment e Sinusoidal Signal 20 Hz 20 kHz Frequency Sweep 20 Hz 20 kHz e Square Signal 20 Hz 5 kHz e White Noise e Pink Noise Polarity Test Signal Over the entire audio band the output level ranges from the lowest microphone levels in the microvolts range up to studio reference levels The user interface is simple and intuitive with three buttons only A short instruction of the Minirator control can also be found on the rear side of the instrument Test Certificate The Minirator MR1 is fully tested to the manufa
12. s MODE UP and DOWN refer to the three corresponding keys whilst the dot matrix type icons e g Signal Frequency El amplitude Le vel refer to the selectable parameters in the display Power On Off Low Battery The MODE key provides HTI MFI the on off functions Bz 160BH2H Press the MODE key Fig 3 Power up screen to switch on The start up screen appears shortly after showing the serial number of your Minirator MR1 see Fig 3 Hold the MODE key pressed for about two seconds to switch the device off again Furthermore Minirator features an Auto Power OFF func tion that automatically switches off the instrument after a selectable duration of inactivity Refer to 2 8 a Define the Auto Power Off Time Notes Minirator reverts all values to the last active status when powered on e If exposed to very high electrostatic discharges the instrument might loose control e g no display In such a case switch the instrument off and on again The Minirator features a low battery status indicator displaying the end of the battery lifetime see below Fig 4 A pulsing vertical block becomes visible at the H 4 right top corner of the See ae E zan display reminding to 3 replace the batteries Fig 4 Low battery indicator 10 Basic Operation Display The display shows either 3 ame the signal parameter g i Ser p 5 ra screen Fig 5 orthe setup screen Fig 6 Fig 5 Default values In the para
13. sinusoidal 20 kHz waveform defined by frequency and level RMS in the display This is the most common waveform in the audio world for measurements of frequency response distortion etc Sweep The output signal is sequentially stepped through all the available frequencies Step duration can be adjusted Actual frequency is displayed Sweep starts automatically indicated by the rotating bar White noise signal with 20 kHz band width Use this signal in conjunction with a spectrum analyzer FFT analyzer Pink Noise signal with 20kHz bandwidth Signal level decreases with 10 dB decade 3 dB octave Use this waveform in conjunction with swept narrow band filters for auditive aural testing Square wave signal with 50 duty cycle and no DC offset Pol Test 20 Hz Proprietary polarity test fix frequency of 20Hz 12 Basic Operation Change Frequency The frequency range of the instrument covers the entire audio range from 20Hz to 20kHz in 31 1 3 octave steps 20 Hz 25Hz 30 Hz 40Hz 50 Hz 65Hz 80 Hz 100 Hz 125 Hz 160 Hz 200 Hz 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz 1kHz 1 25kHz 1 60kHz 200kHz 25kHz 3 15kHz 4 00 kHz 5 00kHz 6 30kHz 8 00kHz 100kHz 125kHz 16 0kHz 20 0 kHz Table 2 Frequency table for sinusoidal signals Select the i sign with the MODE key and toggle through the frequencies using the UP or DOWN key Note e The frequency may not be altered in waveforms Sweep Pink Noise White Noise and PolTest C
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