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MR2 Minirator

MR2 Technical Specifications    
MR2 minirator - audio signal generator


Minirator MR2 is a value for money powerful audio generator, offering a full range of analogue test signals for calibration, maintenance and repair of professional audio equipment. The signals include sine, pink noise, white noise, polarity, sweeps, chirps and delay. The rotary wheel combined with surrounding fast-access function keys enables instant and intuitive operation. Instrument operation is further enhanced with a backlit LCD-illuminated mute button, safety hand strap, jack for external DC power supply and a USB interface for firmware updates.


  • Generator Functions
    • Sine Waveforms, freely selectable frequencies from 10Hz to 20kHz
    • Output level range from -80 to +8 dBu
    • Sweep Signals
      • The start frequency, stop frequency and a step resolution as fine as 1/12th of an octave can be adjusted. Audio analysers automatically trigger to this signal and record the frequency response of a device under test.
    • Chirp Signal
      • A sine-wave with defined start & stop frequency and continuous frequency increase over time. Used in the recording of frequency responses, the measurement of impulse responses and the acoustic assessment of rooms
    • White Noise, Pink Noise
      • Pink or white noise with infinite cycle duration. Additionally the instrument generates gated pink noise (on/off cycle 1 - 9 seconds) for convenient RT60 measurements with the XL2 or AL1 analysers.
    • Polarity Test Signal
      • For measuring the polarity of audio and acoustic signals. The saw-tooth waveform is an ideal stimulus with only moderate stress to speakers. Testing is carried out in combination with either the XL2, AL1 or ML1 analysers.
    • Delay Test Signal
      • For measuring the acoustic propagation delay time from one speaker to the next. Testing is carried out in combination with the XL2 or AL1 analysers.
  • Easy and intuitive operation
    • Frequently used parameters, level, frequency and waveform are directly controlled via hot keys
    • Other functions are controlled via a rotary control with adjustable sensitivity
    • The “mute” key is illuminated and mutes the signal generator output, very useful for performing RT measurements. A flashing backlight indicates the mute status to the operator.
  • Additional features
    • Mains power supply for extended operation
    • USB connector for uploading firmware updates
Product code: MR2 :: NTI 600 000 300
NTi MR2 Minirator £POA

Soft Pouch

The pouch protects the instrument during transport and operation. With its convenient belt-clip, the instrument can be kept close by for those tasks requiring both hands. The pouch allows operation of the instrument fitted in the pouch. MR2 requires additional Shock Protection Jacket.

MR2/MR-PRO pouch

Product code:MR2/MR- PRO-POUCH :: NTI 600 000 302
Soft pouch for MR2 or MR-PRO £POA

40dB Adapter

The Minirator -40 dB Adapter can be utilized to generate high quality microphone level signals. It increases the signal-noise ratio for low level Minirator signals by -40dB. The impedances of the adapter are matched for the MR-PRO or MR2 only.


minirator 40dB adapter plug
40DB-ADAPTER :: NTI 600 000 312
40dB Adapter for use with the MR2 Minirator £POA

Mains Adapter

Mains power adapter with removable plug types. The mains power adapter suits typical power sockets in Australia, China, Europe, Japan, US and UK.

MR-PRO Mains Power Adapter
Product code:MAINS-POWER -ADAPT :: NTI 600 000 333
Mains power adapter for MR2 £POA

EXEL System Case

Hard protective case to accommodate 2 NTi instruments and their accessories, connectors, cables etc.

NTi Exel system case
Product code: EXEL-SYSTEM-CASE :: NTI 600 000 334
Exel system hard case £POA

Calibration Certificate

Although the MR2 is factory calibrated before despatch it is not routinely supplied with a calibration certificate but one may be bought if required

Product code: MR2-CAL-CERT :: NTI 600 000 018
MR2 calibration certificate when initially purchased with new MR2 meter £POA
Product code: MR2-RECALIBRATION :: NTI 600 000 303
Factory recalibration of NTi MR2 Minirator £POA