Sine
Minirator generates pure sine waveforms at user-selectable frequencies and amplitudes. The frequency steps interval can be set to as low as 0.1Hz.
- Selectable frequencies from 10 Hz to 20 kHz
- Level range from -80 to +18 dBu
Minirator MR-PRO / MR2
Your go-to analog audio generator for every setup.
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.
- Analog Audio Generator
- Impedance Meter (MR-PRO)
- Cable Tester (MR-PRO)
- Sine Test Signals
- Frequency Sweeps, Chirps
- Pink Noise, White Noise
Overview
Besides the broad range of generated audio signals, the Minirator MR-PRO monitors the signal balance, phantom power and impedance of the connected load. An 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 all types of audio equipment.
Test Signals
-
-
Sweep
The start/stop frequency, step time and a step resolution as fine as 1/12th octave can be adjusted. Audio analyzers automatically trigger to this signal and record the frequency response of a device under test.
-
Chirp
The chirp signal is a logarithmic or linear gliding sine sweep signal with continuous frequency increase over time. Typical applications are recording of frequency responses, impulse response measurements and acoustic assessment of rooms.
-
Delay Test Signal
This is the designated reference signal to measure the acoustic propagation delay time from speaker to speaker in e.g. churches or auditoriums. It suits the accurate setup of delay line arrangements, thus the directionality of the signal source will be optimized. Testing is carried out in combination with a Sound Level Meter.
More Test Signals
Additional
Pink or white noise is synthesized with high spectral density, normal amplitude distribution and with infinite cycle duration. The Minirator also generates gated pink noise (on/off cycle 1 – 9 seconds) for convenient Reverberation Time measurements with the Sound Level Meter.
Test signal for measuring the polarity of speakers and audio signals. The saw-tooth waveform is an ideal stimulus with only moderate stress to speakers. Testing is carried out in combination with the XL2 Audio and Acoustic Analyzer or Minilyzer ML1.
The Minirator MR-PRO offers a range of additional factory test files, e.g. for speech intelligibility verification. You may store additional user test signals as uncompressed wav-files in the MR-PRO memory. The selected file is seamlessly looped. Wav-file exchange is simplified via the USB port.
- Pre-installed: STIPA, Voice, Music
- User downloads at the support page:
- Third- and Octave Pink Noise
- Square Wave: 10 Hz – 5 kHz
- Sine: 1 Hz – 10 Hz
- Power Test acc. IEC60268-5
- NormSignal acc. EN60065
- Cinema Headroom Test
MR-PRO or MR2?
The Minirator is available as the powerful MR-PRO Audio Generator or the basic MR2.
Generator
| MR-PRO | MR2 | |
|---|---|---|
| Output Level maximum | 18 dBu | 8 dBu |
| Flatness | +/- 0.2 dB | +/- 0.5 dB |
| Output Impedance | 12.5 Ω | 200 Ω |
| THD+N typical | < -96 dB | < -90 dB |
Measurement Functions
| MR-PRO | MR2 | |
|---|---|---|
| Phantom Power | ✔ | - |
| Impedance and Phase | ✔ | |
| Apparent Power and Phase (for 70V/100V distributed loudspeaker systems) | ✔ | - |
| Signal Balance | ✔ | - |
| XLR Cable Tester | ✔ | - |
Test Signals
| MR-PRO | MR2 | |
|---|---|---|
| Sine, Sweep and Chirp | ✔ | ✔ |
| Pink Noise, White Noise | ✔ | ✔ |
| Polarity and Delay | ✔ | ✔ |
| User Wav-Files (*.wav) | ✔ | - |
Further information
| MR-PRO | MR2 | |
|---|---|---|
| Configurations Storage | ✔ | - |
| Protective Shock Jacket | ✔ | - |
| Hand Strap, USB Cable | ✔ | ✔ |
Applications
Applications
-
-
-
Environmental Monitoring
Long-term environmental noise monitoring for communities and sites.
Learn more
-
Accessories
-
70V/100V Protection for MR-PRO
learn moreProtection against high voltages.
-
Cable Test Plug for MR-PRO
learn moreThe Cable Test Plug is used for single-ended cable testing.
-
Exel System Case
learn moreCompact system case for safe transport of measurement devices.
- All Accessoires
Software
-
Data Explorer
PC software for analysis, reporting and rating level calculations.Learn more
FAQs
The MR PRO provides a practical set of reference signals for commissioning and troubleshooting, including sine wave, sweeps and chirps, pink and white noise, plus polarity and delay related test signals. It also supports wave file playback on the MR PRO for application specific signals, like STIPA.
MR PRO includes measurement and verification tools such as XLR cable testing, phantom power checking, and impedance measurement including impedance balance, and it can measure impedance and phase as well as apparent power for distributed speaker systems.
For STIPA, MR PRO is commonly used to inject the STIPA test signal electronically into line inputs of PA and life safety systems, while an NTi analyzer such as the XL2 measures and evaluates intelligibility. In day to day optimization, MR PRO provides stable test signals for tracing the signal chain, level setting, polarity checks, and rapid system troubleshooting together with NTi measurement instruments.
Trusted by professionals worldwide.
-
As a research laboratory invested in supporting communities through real time noise monitoring, I am very happy to exclusively use NTi instruments. Not only are the robust, easy to use, and provide high quality data, the customer service is outstanding and their team will work with you to find the most cost effective and appropriate solutions needed for problems ranging from easy to difficult.
-
I’ve been using the XL2 for over 15 years for short-term and long-term measurements in all kinds of indoor and outdoor environments all across the country. The meter gets me what I want, when I need it. It’s not only the best value for acoustical measurements, it’s the best tool period. I bet my company and reputation on XL2 results and it has not let me down. You would be crazy not to consider adding NTi instruments to your toolkit.
-
We at Constructure GmbH use two XL3 sound level meters for noise monitoring during demolition work. We are very satisfied with these highly user-friendly instruments, the online monitoring in the MeasurEye Cloud, the good advice and qualified support. Factory calibrations at NTi Audio are also handled very smoothly and without complications.
Downloads
- Application Notes
- Product Data
- Product Information
- Test Reports
- User Download
