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Minirator MR2 Audio Signal Generator $335.00
NTI Audio  NEU-MR2
NTI Audio Warranty  |  NTI Audio List Prices

Minirator MR2 Audio Signal Generator
Click to enlarge

Product Details

Minirator MR2 is a powerful audio generator, offering a full range of analog 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.

  • Basic analog audio source
  • Simplifies PA setups
  • Faster troubleshooting
  • Calibrated generator
  • Free online updates

    Generator Functions
  • Sine Waveforms, freely selectable frequencies, up to +8 dBu
  • Sweep Signals, any frequency interval up to 1/12 octave
  • White Noise, Pink Noise
  • Polarity Test Signal
  • Delay Test Signal Intuitive Operation
    The most frequently used parameter changes such as waveform, level and frequency are accessible via function keys. The sensitivity of the rotary wheel is adjustable with the “sens” key.

    Mute Key
    The “mute” key is illuminated and mutes the signal generator output. A flashing backlight indicates the mute status to the operator.

    External DC & USB Connector
    For continuous operation beyond the typical 20 hours of a set of batteries, an external wall-plug power supply is available as an option. The USB interface enables firmware updates via the internet.

    MR2 Wave Forms

    Sine Output
    MR2 generates extremely pure sinusoidal waveforms with
  • freely selectable frequencies from 10 Hz to 20 kHz
  • level range from -80 to +8 dBu

    The start frequency, stop frequency and a step resolution as fine as 1/12th of an octave can be adjusted. Analyzers like the Minilyzer automatically trigger to this signal and record the frequency response of a device under test.

    The chirp signal is a sine-wave with defined start- & stop frequency and continuous frequency increase over time. It is used in the recording of frequency responses, the measurement of impulse responses and the acoustic assessment of rooms.

    Delay Test Signal
    This is the designated reference signal to measure the acoustics propagation delay time from speaker to speaker in e.g. churches or auditoriums. Testing is carried out in combination with the Acoustilyzer AL1.

    Pink & White Noise
    Pink or White Noise is synthesized with high spectral density, normal amplitude distribution and with infinite cycle duration. An automated on-off cycle mode for convenient RT60 measurements with the Acoustilyzer AL1 is included.

    The saw-tooth waveform of the polarity test signal is an ideal stimulus with only moderate stress to speakers. Minilyzer ML1 and Acoustilyzer AL1 take advantage of this and correctly analyze the polarity of the incoming signal.

  • Product Specifications
    Outputs: Balanced XLR, unbalanced RCA phantom power resistant
    Inputs: DC power supply, USB
    Signal Wave Forms: Sine, Polarity Test Signal, Delay Test Signal, White Noise (crest factor = 3.05), Pink Noise (crest factor = 4.5)
    Frequency Setting
    Range: 10 Hz - 20 kHz
    Increment: in 1 digit steps
    Accuracy: 0.01%
    Stepped Sweep Function
    Freq. range: freely selectable
    Increment: 1/1, 1/3, 1/6, 1/12 octave
    Sweep speed: selectable 0.5 - 5 seconds
    Continuous Sweep (Chirp) Function
    Freq. range: freely selectable
    Increment: Linear / Logarithmic
    Chirp speed: 1.0 - 99 seconds per cycle
    Units: dBu, dBV, V,
    Increment: in 1 digit steps (e.g. 0.1 dBu)
    Output Level Ranges
    Sine, Sweep, Chirp: - 80 dBu to +8 dBu
    White Noise: - 80 dBu to +0 dBu
    Pink Noise: - 80 dBu to - 2 dBu
    Polarity, Delay Test: - 80 dBu to +6 dBu
    Flatness RL > 600 Ohm: ± 0.5 dB
    Accuracy @ 1kHz:± 0.5 dB
    THD+N: -96 dB (0.0016 %) @ 8 dBu; Noise Floor typ. 25 μV
    USB Functionality: Firmware update
    Display: Graphical, with back light
    Auto-Power-Off: 10, 30, 60 minutes or OFF
    Batteries: 3 x AA Alkaline dry cells or rechargeable equivalents
    Battery Life at 0 dBu, no load, typ.: 14 Hours
    Temperature Range: 0° to 45° C (32° to 113° F)
    Humidity: < 90% rel. humidity, non-condensing
    Dimensions (LxWxH): 147 x 74 x 41 mm (incl. protective shock jacket)
    Weight:including batteries 250 g (9 oz.)

    Optional Accessories
    Pouch NTI# 600 000 302
    Cable Test Adapter NTI# 600 00 311
    Minirator -40dB Adapter NTI# 600 000 312
    Exel System Case NTI# 600 00 334
    MR-Pro 70V/100V Protective Adapter NTI# 600 000 313

    Product Weight
    9 oz. (250 g) including batteries

    Product Dimensions
    147 x 74 x 41 mm

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