NTI Audio, MR-Pro Minirator Audio Signal Generator/Impedance Meter

The Minirator MR-PRO provides a full set of analog audio signals including sine wave, pink noise, white noise, delay test signal, polarity test signal, stepped sweep and continuous sine sweep. Further, a set of wav-files, useful for system optimization, is stored in the internal flash memory. Add your own personal favorites to this set.The signal balance, phantom power and impedance of the connected load are monitored. The integrated XLR cable tester simplifies trouble shooting tasks.The workhorse MR2 provides all the basic standard signals at an attractive price point. Both generators are indispensable and proven tools for set-up, maintenance and monitoring of audio equipment of all types. The wide range of functionalities is tailored for measurement tasks in:

• Installed Sound
• Life Safety Systems
• Live Sound
• Broadcast
• Building Acoustics
• Industrial and Aerospace
• Quality Control

Specifications / Documents

• Outputs: Balanced XLR, unbalanced RCA, phantom power resistant.
• Inputs: DC power supply, USB, XLR for cable test.
• Signal Wave Forms: Sine, Polarity Test Signal, Delay Test Signal, White Noise (crest factor, PAR* = 3.05 (9.7 dB), Pink Noise (crest factor, PAR* = 4.5 (13.1 dB), Gated Pink Noise (1 - 9 seconds), Wave File playback (MR-PRO).
• Wave File Format: Sampling frequency:48 kHz, Resolution: 16 Bit, Mono / Stereo, Output level: 0 dBFS = 18 dBu (sine) acc. to EBU R68.
• Frequency Setting: Range:10 Hz to 20 kHz, Increment: in 1 digit steps, Accuracy: 0.01%.
• Stepped Sweep Function: Frequency range: freely selectable, Increment: 1/1, 1/3, 1/6, 1/12 octave, Sweep speed: selectable 0.5 to 5 seconds.
• Continuous Sweep (Chirp) Function: Frequency range: freely selectable, Increment: Linear / Logarithmic, Chirp speed: 1 to 99 seconds per cycle.
• Level Setting: Units: dBu, dBV, V, dBFS, %, Increment: in 1 digit steps (e.g. 0.1 dBu).
• Output Level Ranges: Sine, Sweep, Chirp: -80 dBu to +18 dBu, White Noise: -80 dBu to +10 dBu, Pink Noise: -80 dBu to +8 dBu, Polarity, Delay Test: -80 dBu to +16 dBu.
• Flatness: RL . 600 Ohm: ±0.2 dB @ 10 Hz to 12 kHz -0.1 dB / +0.3 dB @ 12 kHz to 20 kHz.
• Accuracy @ 1kHz: ±0.2 dB.
• THD+N: 22 Hz to 22 kHz, average: -96 dB (0.0016%) @ 18 dBu, @ 1 kHz, typical: Noise floor typ. 15 V.
• Output Impedance: 12.5 Ohm balanced, Imax = 10 mA.
• Impedance Measurement: Method: Absolute value Z, Measurement range: 4 Ohm to 50 kOhm balanced, 2 Ohm to 25 kOhm unbalanced, @ f = 30 Hz to 10 kHz (Sine), @ Level from -20 to +18 dBu, ±10% or ±2Ohm (whatever is higher).
• Power Calculation: Reference voltage: 25 V, 35 V, 50 V, 70.7 V, 100 V, 140 V, 200 V.
• Phantom Voltage: Measurement range: 0 to 54 V, Accuracy: ±3 % or ±0.5 V.
• USB Functionality: Firmware update, Mass Storage Device.
• Flash Memory: 512 MByte for storing wave files and configurations.
• 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: 0 dBu, no load, typical: 8 hours.
• Temperature Range: 0° to 45° C (32° to 113° F).
• Humidity: < 90% relative humidity, non-condensing.
• Protection Rating: IP51.
• Dimensions (LxWxH):152 x 81 x 43 mm, (incl. protective shock jacket).
• Weight including Batteries: 310 g (11 oz.).