MCM Electronics

Minirator Analog Audio Signal GeneratorMCM Part #: 72-8600  |  NTI Part #: MR2

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Minirator MR2 is a powerful audio generator, offering a full range of useful analog test signals for calibration, maintenance and repair of professional audio equipment.

The rotary settings wheel combined with surrounding fast access function keys enables instant and intuitive operation without compromising fine adjustment capabilities. Instrument operation is further enhanced with a backlit LCD, illuminated mute button, safety hand strap, jack for external DC power supply and an USB interface for firmware updates.

Product Description

  • 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


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)
Wave File playback (MR-PRO)
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
Level Units dBu, dBV, V
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
RL > 600 Ohm ± 0.5 dB
Accuracy @ 1kHz ± 0.5 dB
22 Hz - 22 kHz, average, @ 1 kHz, typical -90 dB (0.0032 %) @ 8 dBu, noise floor typ. 25uV
Output Impedance 200 Ohm balanced
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 14 h
Temperature Range 0° to 45° C (32° to 113° F)
Humidity < 90% rel. humidity, non-condensing
Dimensions (LxWxH) 147 x 74 x 41 mm
Weight 250 g (9 oz.)

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Package Specifications & Dimensions
Weight:1.092 lbs.
RoHS Comp:No
Warranty:365 days
Need to Return?
Length:8.75 in.
Width:6.25 in.
Height:2.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages

MCM Cat 57, Page 1286

MCM Cat 56, Page 1126

PDF Reference

Requires Adobe Acrobat Reader.

Mfr. Info

Mfr. Name:NTI
Mfr. Part Number:MR2