NTI MR2
Analog Audio Signal Generator

MR2

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.

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.

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

Sweep
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.

Chirp
The chirp signal is a sine-wave with defined start- & stop frequency and continious 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 progagation 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. Also included is an automatic on/off cycle mode for conveniently making RT60 measurements.

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

Our Part #  MR2