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Acoustilyzer - AL1 - Compact Acoustical Analyzer - Leaflet
Acoustilyzer
Minilyzer
Minirator
MiniSPL
Minstruments
for Analog Audio Signals
Minstruments
for Analog Audio Signals
MR2 MiniRAtoR
Sine Wave, Sweeps, noise & more
Frequency Resolution to 0.01 Hz
External Power & USB Connector
Backlight for LCD & Mute Key
+8 dBu Max. output Level
tHD+n < -90 dB (0.003%)
2
1
3
XLR
RCA
~
~
I<10mA
I<10mA
6.3 ?
6.3 ?
MR-PRO
U/2
U/2
U
0.5 ?
Enhanced Analog Audio Signal GeneratorAnalog Audio Signal Generator
Basic Signals
MR-PRO offers the same range of au-
dio signals as the MR2. The optimized
output stage features even lower re-
sidual distortion than the MR2, com-
bined with an extended level range up
to +18 dBu.
Compensated output Stage
The output level corresponds over a
wide range of loads to the set output
voltage based upon the output imped-
ance of the generator. Possible maxi-
mum limits when reaching the output
current limit are clearly indicated.
Measurement Functions
Sophisticated and unique technology
continuously measures load imped-
ance, balance and any phantom power
voltage, providing a detailed view of
the connected load for rapid fault find-
ing.
Cable test
The built-in cable tester verifies the proper
1:1 pin connection through any cable
connected between the XLR output and
the built-in XLR input. Alternatively an
optional Cable Test Plug may be used for
single ended installations.
Store Preset Configurations
Up to 10 complete instrument con-
figurations can be stored in the inter-
nal flash memory and reloaded for re-
petitive tasks. The saved settings may
also be transferred to other Minirator
MR-PRO instruments.
User Wave Forms (*.WAV)
A number of user test signals may be
stored as uncompressed WAV-files in
the MR-PRO memory. The selected file
is seamlessly looped. Data exchange is
simplified via the USB port.
MR2 or MR-PRo?
The Minirator is available as MR2
and MR-PRO. While the MR2 has
been optimized for “Value at a
most attractive price“, the MR-PRO
has been developed with additional
innovative functionality for even
more demanding applications.
MR2 MR-PRo
Generator
Output Level max.
Flatness
Output Impedance
THD+N typical
8 dBu
+/- 0.5 dB
200 O
< -90 dB
18 dBu
+/- 0.2 dB
12.5 O
< -96 dB
Measurement Functions
Phantom Power Measurement
Impedance and Balance
XLR Cable Tester
?
?
?
Wave Forms
Sine, Stepped & Cont. Sweep
Pink Noise, White Noise
Polarity- and Delay Test Signal
Proprietary Wave Files (*.WAV)
?
?
?
?
?
?
?
Protective Shock Jacket
Hand Strap, USB Cable ?
?
?
nti article codes 600 000 300 600 000 310
MiniRAtoR MR-PRo
Sine Wave, Sweeps, noise & more
Proprietary Wave Forms (*.WAV)
impedance Meter
Cable tester
+18 dBu Max. output Level
tHD+n < -96 dB (0.002%)
the MR-PRo is an extremely powerful analog audio generator to satisfy every need for the professional engineer. Proprietary user
wave forms may be loaded via USB into the internal flash memory. innovative and unique technology includes continuous monitor-
ing of the impedance of the connected load, the signal balance and the phantom power. Plus the integrated cable testing promotes
MR-PRo to the level of a cable analyzer, simplifying trouble shooting tasks. MR-PRo includes all functions of the Minirator MR2.
technical Data MR2 / MR-PRo
outputs Balanced XLR, unbalanced RCA, Phantom power resistant
inputs XLR for cable test (MR-PRO), DC power supply, USB port
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)
Wave File Format Sampling freq.: 48 kHz
(MR-PRo) Resolution: 16 Bit, Mono & Stereo
Output Level: 0 dBFS = 18 dBu (sine), acc. to EBU R68
Frequency Setting Range: 10 Hz - 20 kHz
Increment: in 1 digit steps
Accuracy: 0.01%
Stepped Sweep Freq. range: freely selectable
Function Increment: 1/1, 1/3, 1/6, 1/12 octave
Sweep speed: selectable, 0.5 - 5 seconds
Continuous Sweep Freq. range: freely selectable
(Chirp) Function Increment: Linear / Logarithmic
Chirp speed: 1 - 99 seconds per cycle
Level Setting MR-PRO: dBu, dBV, V, dBFS, %
MR2: dBu, dBV, V
Increment: in 1 digit steps (e.g. 0.1 dBu)
output Level Ranges Wave form Min Max MR-PRO Max MR2
Sine, Sweep, Chirp - 80 dBu +18 dBu + 8 dBu
White Noise - 80 dBu +10 dBu 0 dBu
Pink Noise - 80 dBu + 8 dBu - 2 dBu
Polarity, Delay Test - 80 dBu +16 dBu + 6 dBu
Flatness MR-PRO: +/-0.2 dB @ 10 Hz - 12 kHz
-0.1 dB/+0.3 dB @ 12 kHz - 20 kHz
MR2: ± 0.5 dB @ RL = 600 Ohm
Accuracy MR-PRO: ± 0.2 dB MR2: ± 0.5 dB @ 1 kHz
tHD+n 22 Hz - 22 kHz, average, @ 1 kHz, typical
MR-PRO: -96 dB (0.0016%) @ 18 dBu, noise floor typ. 15 µV
MR2: -90 dB (0.0032%) @ 8 dBu, noise floor typ. 25 µV
output impedance MR-PRO: 12.5 Ohm balanced, Imax = 10 mA
MR2: 200 Ohm balanced
impedance Method: Absolute value Z
Measurement Meas. Range: 4 Ohm - 50 kOhm balanced
(MR-PRo) 2 Ohm - 25 kOhm unbalanced
@ f = 30 Hz - 10 kHz (Sine) and
@ Level from -20 dBu to +18 dBu
Accuracy: ± 10 % or ± 2 Ohm
Power Calculation 25 V, 35 V, 50 V, 70.7 V, 100 V, 140 V, 200 V
Phantom Power Reading Meas. Range 0 - 54V
(MR-PRo) Accuracy: ± 3 % or ± 0.5 V
USB Functionality Firmware update
Mass Storage Device (MR-PRO)
Flash Memory (MR-PRo) 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 typ. MR-PRO: 8 h / MR2: 14 h @ 0 dBu w/o load
temperature Range 0° to 45° C (32° to 113° F)
Humidity < 90% rel. humidity, non-condensing
Dimensions (LxWxH) MR-PRO: 152 x 81 x 43 mm (incl. protective shock jacket)
MR2: 147 x 74 x 41 mm
Weight MR-PRO: 310 g (11 oz.) MR2: 250 g (9 oz.) incl. batteries
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.
Pouch MR2/MR-PRo
Belt pouch
NTI Art.No 600 000 302
Accessories
70V/100V Adapter
for MR-PRO
NTI Art.No 600 000 313
Mains Power Adapter
for MR2 / MR-PRO
NTI Art.No 600 000 301
This document certifies that the following instrument has been tested and calibrated
to the manufacturer specifications.
• Device Type: Minirator MR-PRO
• Serial Number: GUK481F1D0
• Date of Calibration: 15. Dezember 2006
• Next Calibration Due: 15. Dezember 2007
• Results: PASSED
(for detailed report see next page)
Tested by: M. Frick
Signature:
Stamp:
Test & Calibration Certificate
NTI AG • Im alten Riet 102 • 9494 Schaan • Liechtenstein • Europe • Tel: +423 239 6060 • Fax: +423 239 6089
www.nti-audio.com • HR-Nr: 2.012.557 • MwStNr: 54306 • Bank: VP Bank, Vaduz, Acc No: 322.235.015
Calibration Certificate
for MR2 / MR-PRO
NTI Art.No 600 000 303
Sine output
MR2 generates extremely pure sine
waveforms at freely selectable frequen-
cies. In addition, sweep signals may be
defined within any frequency interval
and with a step resolution as fine as
1/12th of an octave.
Pink noise, White noise
Pink or White Noise is synthesized with
high spectral density, normal amplitude
distribution and with infinite cycle dura-
tion. An automated on-off cycle mode
for convenient RT60 measurements
with the Acoustilyzer AL1 is included.
Polarity, Delay
Additional test signals for measuring
speaker- or cable polarity and propa-
gation delays ideally complement the
companion ML1 / AL1 analyzers.
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
The typical battery life time is 20 hours.
For continuous operation an optional
mains power supply is available.
The USB interface enables firmware
updates via the NTI website.
Cable test Plug
for MR-PRO
NTI Art.No 600 000 311
-40dB Adapter
for high quality mic signals
NTI Art.No 600 000 312
Acoustilyzer
Minilyzer
Minirator
MiniSPL
Minstruments
for Analog Audio Signals
MR2 MINIRATOR
Sine Wave, Sweeps, Noise & more
Frequency Resolution to 0.01 Hz
External Power & USB Connector
Backlight for LCD & Mute Key
+8 dBu Max. Output Level
THD+N < -90 dB (0.003%)
2
1
3
XLR
RCA
~
~
I<10mA
I<10mA
6.3 ?
6.3 ?
MR-PRO
U/2
U/2
U
0.5 ?
Enhanced Analog Audio Signal GeneratorAnalog Audio Signal Generator
Basic Signals
MR-PRO offers the same range of au-
dio signals as the MR2. The optimized
output stage features even lower
residual distortion than the MR2, com-
bined with an extended level range up
to +18 dBu.
Compensated Output Stage
The output level corresponds over a
wide range of loads to the set output
voltage based upon the output imped-
ance of the generator. Possible maxi-
mum limits when reaching the output
current limit are clearly indicated.
Measurement Functions
Sophisticated and unique technology
continuously measures load imped-
ance, balance and any phantom power
voltage, providing a detailed view of
the connected load for rapid fault
fi nding.
Cable Test
The built-in cable tester verifi es the proper
1:1 pin connection through any cable
connected between the XLR output and
the built-in XLR input. Alternatively an
optional Cable Test Plug may be used for
single ended installations.
Store Preset Confi gurations
Up to 10 complete instrument con-
fi gurations can be stored in the in-
ternal fl ash memory and reloaded for
repetitive tasks. The saved settings may
also be transferred to other Minirator
MR-PRO instruments.
User Wave Forms (*.WAV)
A number of user test signals may be
stored as uncompressed WAV-fi les in
the MR-PRO memory. The selected fi le
is seamlessly looped. Data exchange is
simplifi ed via the USB port.
MR2 or MR-PRO?
The Minirator is available as MR2
and MR-PRO. While the MR2 has
been optimized for “Value at a
most attractive price“, the MR-PRO
has been developed with additional
innovative functionality for even
more demanding applications.
MR2 MR-PRO
Generator
Output Level max.
Flatness
Output Impedance
THD+N typical
8 dBu
+/- 0.5 dB
200 O
< -90 dB
18 dBu
+/- 0.2 dB
12.5 O
< -96 dB
Measurement Functions
Phantom Power Measurement
Impedance and Balance
XLR Cable Tester
a
a
a
Wave Forms
Sine, Stepped & Cont. Sweep
Pink Noise, White Noise
Polarity- and Delay Test Signal
Proprietary Wave Files (*.WAV)
a
a
a
a
a
a
a
Protective Shock Jacket
Hand Strap, USB Cable a
a
a
NTI article codes 600 000 300 600 000 310
MINIRATOR MR-PRO
Sine Wave, Sweeps, Noise & more
Proprietary Wave Forms (*.WAV)
Impedance Meter
Cable Tester
+18 dBu Max. Output Level
THD+N < -96 dB (0.002%)
The MR-PRO is an extremely powerful analog audio generator to satisfy every need for the professional engineer. Proprietary user
wave forms may be loaded via USB into the internal fl ash memory. Innovative and unique technology includes continuous monitoring
of the impedance of the connected load, the signal balance and the phantom power. Plus the integrated cable testing promotes
MR-PRO to the level of a cable analyzer, simplifying trouble shooting tasks. MR-PRO includes all functions of the Minirator MR2.
Technical Data MR2 / MR-PRO
Outputs Balanced XLR, unbalanced RCA
Phantom power resistant
Inputs XLR for cable test (MR-PRO)
DC power supply, USB port
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)
Wave File Format Sampling freq.: 48 kHz
(MR-PRO) Resolution: 16 Bit, Mono & Stereo
Output Level: 0 dBFS = 18 dBu (sine), acc. to EBU R68
Frequency Setting Range: 10 Hz - 20 kHz
Increment: in 1 digit steps
Accuracy: 0.01%
Stepped Sweep Freq. range: freely selectable
Function Increment: 1/1, 1/3, 1/6, 1/12 octave
Sweep speed: selectable, 0.5 - 5 seconds
Continuous Sweep Freq. range: freely selectable
(Chirp) Function Increment: Linear / Logarithmic
Chirp speed: 1 - 99 seconds per cycle
Level Units MR-PRO: dBu, dBV, V, dBFS, %
MR2: dBu, dBV, V
Output Level Ranges Wave form Min Max MR-PRO Max MR2
Sine, Sweep, Chirp - 80 dBu +18 dBu + 8 dBu
White Noise - 80 dBu +10 dBu 0 dBu
Pink Noise - 80 dBu + 8 dBu - 2 dBu
Polarity, Delay Test - 80 dBu +16 dBu + 6 dBu
Flatness MR-PRO: ± 0.2 dB MR2: ± 0.5 dB @ RL = 600 Ohm
Accuracy MR-PRO: ± 0.2 dB MR2: ± 0.5 dB @ 1 kHz
THD+N 22 Hz - 22 kHz, average, @ 1 kHz, typical
MR-PRO: -96 dB (0.0016%) @ 18 dBu, noise fl oor typ. 15 µV
MR2: -90 dB (0.0032%) @ 8 dBu, noise fl oor typ. 25 µV
Output Impedance MR-PRO: 12.5 Ohm balanced, Imax = 10 mA
MR2: 200 Ohm balanced
Impedance Method: Absolute value Z
Measurement Meas. Range: 4 Ohm - 50 kOhm balanced
(MR-PRO) 2 Ohm - 25 kOhm unbalanced
@ f = 30 Hz - 10 kHz (Sine) and
@ Level from -20 dBu to +18 dBu
Accuracy: ± 10 % or ± 2 Ohm
Power Calculation 25 V, 35 V, 50 V, 70.7 V, 100 V, 140 V, 200 V
Phantom Power Reading Meas. Range 0 - 54V
(MR-PRO) Accuracy: ± 3 % or ± 0.5 V
USB Functionality Firmware update
Mass Storage Device (MR-PRO)
Flash Memory (MR-PRO) 512 MByte for storing wave fi les and confi gurations
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 typ. MR-PRO: 8 h / MR2: 14 h @ 0 dBu w/o load
Temperature Range 0° to 45° C (32° to 113° F)
Humidity < 90% rel. humidity, non-condensing
Dimensions (LxWxH) MR-PRO: 152 x 81 x 43 mm (incl. protective shock jacket)
MR2: 147 x 74 x 41 mm
Weight MR-PRO: 310 g (11 oz.) MR2: 250 g (9 oz.) incl. batteries
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 fi ne 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 fi rmware updates.
Pouch MR2/MR-PRO
Belt pouch
NTI Art.No 600 000 302
Accessories
70V/100V Adapter
for MR-PRO
NTI Art.No 600 000 313
Mains Power Adapter
for MR2 / MR-PRO
NTI Art.No 600 000 301
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Calibration Certifi cate
for MR2 / MR-PRO
NTI Art.No 600 000 303
Sine Output
MR2 generates extremely pure sine
waveforms at freely selectable frequen-
cies. In addition, sweep signals may be
defi ned within any frequency interval
and with a step resolution as fi ne as
1/12th of an octave.
Pink Noise, White Noise
Pink or White Noise is synthesized with
high spectral density, normal amplitude
distribution and with infi nite cycle dura-
tion. An automated on-off cycle mode
for convenient RT60 measurements
with the Acoustilyzer AL1 is included.
Polarity, Delay
Additional test signals for measuring
speaker- or cable polarity and propa-
gation delays ideally complement the
companion ML1 / AL1 analyzers.
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
fl ashing backlight indicates the mute
status to the operator.
External DC & USB Connector
The typical battery life time is 20
hours. For continuous operation an op-
tional mains power supply is available.
The USB interface enables fi rmware
updates via the NTI website.
Cable Test Plug
for MR-PRO
NTI Art.No 600 000 311
-40dB Adapter
for high quality mic signals
NTI Art.No 600 000 312
Reverberation Time RT60
Octave band RT60 measurements
(8 octave bands from 63 Hz to 8 kHz)
according to ISO3382 with auto trigger,
ranging and averaging. Suitable gated
pink noise sequences are included on
the supplied Test-CD.
Speech Intelligibility STIPA
The STIPA analyzer option allows reli-
able measurement of the intelligibility
within 15 sec. according to the latest
IEC standards. Measurements may be
referenced to previously acquired noise
level spectra. TNO verifi ed algorithm.
Real Time Analyzer, RTA
Fast RTA with 1/3 and full octave
resolution also calculates SPL, LEQ and
Max/Min for each band. Numerical cur-
sor readout with peak hold. Fast log-
ging of RTA results together with broad
band values via PC interface.
Zoom FFT
Extremely fast, real-time Zoom FFT
with resolutions up to 0.7Hz over the
entire frequency range. The ideal tool
for visualization of comb fi lters and
narrow band effects. Features detailed
cursor readout and data storage.
Delay Time
Calculates the delay time between elec-
trical ref erence signal and signal from
built-in microphone. A designated chirp
is provided on the Test-CD. The auto-
matic difference display simplifi es the
verifi cation of delay line arrangements.
Sound Level Meter
Featuring SPL (act, max, min), LEQ,
repeatable short time LEQ and logging
functionality. RTA display is selectable
without interrupting broad band meas-
urements, fulfi lling any event monitor-
ing requirement.
Analog Audio AnalyzerCompact Acoustical Analyzer Measurement Microphone
Frequency Sweep
ML1 automatically triggers to a sweep
sequence with any step width and
records the frequency response. The
Minirator MR2 or MR-PRO may be used
as signal source. After capture all sweep
data is available.
THD+N
Supports Total Harmonic Distortion plus
Noise (THD+N) and 2nd to 5th selective
harmonic distortion as dB value or in %.
Input level and frequency measurement
runs in parallel and the balance indicator
fi nds defective cables.
Level
Continuously measures absolute input
levels either in volts, dBu or dBV
and the signal frequency. Relative
measurements are also supported.
Connecting MiniSPL further supports
basic SPL and LEQ measurements.
Polarity
Finding wrongly connected speakers is
as simple as moving ML1 into the sound
fi eld of the speaker under test and its
polarity will be displayed. The same
measurement through the XLR input is
ideal for cable tests.
Time Sweep
Intermittent faults are often hard to
fi nd. The time sweep records the RMS
level, frequency and the THD+N value
simultaneously, helping to monitor the
audio signal during a long period of
time for later analysis.
Scope
Provides a quick and robust look at the
waveform of the balanced audio signal,
quickly fi nding clipping amplifi ers
etc. The auto-scale and auto-trigger
functionality are normally only found
in expensive stand alone scopes.
NTI article codes
Minilyzer ML1 600 000 011
Minilyzer ML1 incl. MiniLINK USB PC Interface 600 000 030
Technical Data Minilyzer ML1
Measurements Level-RMS, Level-Relative, THD+N, k2...k5, vu+PPM,
Frequency, Polarity, Signal Balance Error, Frequency Sweep,
Time Sweep, 1/3rd Octave Spectrum, Scope,
AFILS measurements supported (with MiniLINK)
Level Units: dBu, dBV, VRMS Accuracy: ± 0.5 % @ 1 kHz
Flatness: ± 0.1 dB Bandwidth: 20 Hz to 20 kHz
Resolution: 3 digits (dB-scale) or 4 digits (V-scale)
Frequency Range: 10 Hz to 20 kHz
Resolution: 4 digits
Accuracy: < ± 0.1 %
THD+N including 2nd to 5th harmonics analysis
Meas. Bandwidth: 10 Hz to 20 kHz
Resolution: 3 digits (dB-scale) or 4 digits (%-scale)
Residual THD+N: balanced < -85 dB @ -10 dBu to +20 dBu
unbalanced < -74 dB @ 0 dBu to +14 dBu
vu & PPM (vu-Indicator and Peak Program Meter)
according to IEC 60268 and DIN 45406.
PPM Type I, IIa and Nordic. Both meters with adjustable
reference and with analog & numerical peak-hold readout.
Polarity Test Positive/Negative detection through internal microphone or
XLR/RCA connector. Checks polarity of midrange-speakers,
woofers and cables. MR2 or MR-PRO provides test signal.
Signal Balance Error Indication range 0.0 % to 100 %
Deviation from perfect balance in % or *1
Sweep Level vs. Frequency or
Level and THD+N and Frequency vs. Time
1/3rd Octave Spectrum acc. IEC 1260, class II and
ANSI S1.11-1976, class II from 50 Hz to 20 kHz,
Bargraph for Level RMS 20 Hz to 20 kHz
Scope Auto triggering, auto ranging, auto scaling
Filters Flat, A-weighting, C-message, Highpass
22 Hz / 60 Hz / 400 Hz, Voice bandpass, X-Curve-1
Technical Data Minilyzer ML1 + Acoustilyzer AL1
Input Connectors XLR balanced, RCA unbalanced
Input Impedance 40 kOhm balanced, 20 kOhm unbalanced
Input RMS +20 dBu balanced, +14 dBu unbalanced
(upper meas. limit) use Adapter -20 dB for balanced levels up to 40 dBu
Max. DC Input ±50 VDC
Residual Noise < 12 µV, XLR-input shorted
Internal Microphone Omni directional (for polarity and delay measurements only)
Monitor Output Jack 3.5 mm (1/8“), suitable for all common headsets
Display Backlit graphic LCD, 64 x 100 pixels
Batteries 3x AA batteries (alkaline)
Typical battery lifetime > 16 hrs
Dimensions (LxWxH) 163 x 86 x 42 mm (6.4" x 3.38" x 1.63")
Weight 300 g (10.5 oz) incl. batteries
Temperature 0° to +45° C (32° to 113° F)
Humidity < 90 % R.H., non condensing
Technical Data Acoustilyzer AL1
Sound Pressure Level • Leq, short-time Leq , Lmin, Lmax acc. IEC 61672, Class 1
• Timer for single and repeated measurements
• Dynamic range (using MiniSPL): 30 - 130 dBSPLA
• Filters: Flat, A- and C-weighted, X-Curve-1, RLB
• Logging of SPL/LEQ results into AL1 memory
• Wideband- and RTA values simultaneously available
Real Time Analyzer • 1/3 or full octave band resolution, class 0 fi lters
• SPL, LEQ and Max-Min display per band
• Fast logging of results to the PC
Zoom FFT • Real-time Zoom FFT with 50% overlapping, 93 Bins
• Frequency Range: 10 Hz - 20 kHz
• Resolution: 187.5 Hz to 0.73 Hz
Reverberation Time • 8 octave bands results, based on T20, according to
ISO3382. Automatic averaging with individual result
readout and storage
• Source signal: Gated pink noise (CD included)
Delay Time • Propagation delay between electrical and acoustical signal
input using built-in mic. Resolution < 0.1 ms, max time: 1 s
• Dedicated test signal: NTI chirp (CD included)
STIPA (Option) • Single value STI and CIS test result. Modulation indices
and individual band level results accessible. Error indicator.
• According to IEC 60268-16, 2003 release
• TNO verifi ed algorithm
• Post processing with recorded spectra supported
Electrical • Level RMS, THD+N, Frequency, Polarity
• Filters: Flat, A- and C-weighted, HP400, HP19k
PC Interface • MiniLINK USB interface with PC software and
interface cable for data logging included
Further technical data continued on next page.
NTI article codes
Acoustilyzer AL1 (MiniLINK included) 600 000 080
ML1-AL1 Firmware Crossgrade 800 000 012
(for all Minilyzer ML1 users, MiniLINK required)
STI-PA Measurement Option 800 000 013
Accessories for Acoustilyzer and Minilyzer
MiniSPL Battery powered
Measurement Microphone
NTI Art.No 600 000 022
Adapter -20dB
Electrical Attenuator
NTI Art.No 600 000 014
System Case
for Minstruments + Mic
NTI Art.No 600 000 020
Pouch for ML1/AL1
Soft pouch with belt-loop
NTI Art.No 600 000 012
MiniLINK USB PC Inter-
face for ML1, Software
NTI Art.No 600 000 033
AL1 ACOUSTILYZER
Real Time Analyzer
Reverberation Time RT60
Speech Intelligibility STIPA
Zoom FFT, Delay, THD+N, ...
Class 0 design
Long Battery Life (>16h)
The Acoustilyzer is a handheld audio test instrument with a wide range of acoustical measurement functions, such as testing and moni-
toring of sound pressure level at concerts, room acoustics and speech intelligibility STI-PA. The practical blend of electrical and acoustical
functions, combined with computer connectivity through the standard USB interface positions AL1 to be an indispensable tool for every
sound/system contractor, installer and multi-media specialist.
MINILYZER ML1
Level: RMS, Rel, SPL, LEQ
THD+N, 2nd to 5th Harmonics
Frequency and Time Sweeps
Scope, vu+PPM, Polarity
Balanced & Unbalanced Input
High Accuracy (+/- 0.1dB)
The Minilyzer ML1 is a powerful, complete audio analyzer in a palm-sized format. Its comprehensive set of easy to access measurement
functions simplify the process of system verifi cation, diagnostics and repairs of even very complex audio installations. The smart user
interface aids operators of all skill levels by setting all ranges automatically and providing complete results on a single screen. The op-
tional MiniLINK USB interface supports data storage, documentation and fi rmware updates.
MiniSPL
1/2“ Measurement Mic
Battery Powered
Balanced Output
Omni-directional
Individually Adjusted
Auto Power-Off Control
The MiniSPL is the ideal accessory for the Acoustilyzer and
Minilyzer. Its self-powered design, the individual factory adjust-
ment and the auto power-off compel the MiniSPL to be an accu-
rate, easy to handle yet affordable measurement microphone.
Technical Data MiniSPL (NTI article code: 600 000 022)
Microphone Type 1/2“, omni-directional, pre-polarized condenser
free fi eld transducer
Sensitivity (20 ±2) mV/Pa, (-34 ±1) dBV/Pa @ 1 kHz, balanced output
Frequency Response 100 Hz - 1250 Hz ±1 dB
20 Hz - 20 kHz ±3 dB (IEC61672, class 2)
Peak Acoustic Input 130 dBSPL @ 1 kHz
Noise 32 dBSPL, A-weighted
Power Supply 1 x AA battery 1.5 V, battery lifetime typical 300 hrs
www.minstruments.com
NTI AG
Im alten Riet 102
9494 Schaan
Liechtenstein, Europe
Phone +423 239 60 60
Fax +423 239 60 89
info@nti-audio.com
M
I 1
0.
08
NTI Americas
Phone +1 503 684 7050
Fax +1 503 684 7051
americas@nti-audio.com
NTI China
Phone +86 512 6802 0075
Fax +86 512 6802 0097
china@nti-audio.com
NTI Japan
Phone +81 3 3634 6110
Fax +81 3 3634 6160
japan@nti-japan.com
Minstruments, Acoustilyzer, MiniSPL, MiniLINK,
Minilyzer and Minirator are Trademarks of NTI.
All information subject to change without notice.
Reverberation Time RT60
Octave band RT60 measurements
(8 octave bands from 63 Hz to 8 kHz)
according to ISO3382 with auto trigger,
ranging and averaging. Suitable gated
pink noise sequences are included on
the supplied Test-CD.
Speech Intelligibility STIPA
The STIPA analyzer option allows reli-
able measurement of the intelligibility
within 15 sec. according to the latest
IEC standards. Measurements may be
referenced to previously acquired noise
level spectra. TNO verifi ed algorithm.
Real Time Analyzer, RTA
Fast RTA with 1/3 and full octave
resolution also calculates SPL, LEQ and
Max/Min for each band. Numerical cur-
sor readout with peak hold. Fast log-
ging of RTA results together with broad
band values via PC interface.
Zoom FFT
Extremely fast, real-time Zoom FFT
with resolutions up to 0.7Hz over the
entire frequency range. The ideal tool
for visualization of comb fi lters and
narrow band effects. Features detailed
cursor readout and data storage.
Delay Time
Calculates the delay time between elec-
trical ref erence signal and signal from
built-in microphone. A designated chirp
is provided on the Test-CD. The auto-
matic difference display simplifi es the
verifi cation of delay line arrangements.
Sound Level Meter
Featuring SPL (act, max, min), LEQ,
repeatable short time LEQ and logging
functionality. RTA display is selectable
without interrupting broad band meas-
urements, fulfi lling any event monitor-
ing requirement.
Analog Audio AnalyzerCompact Acoustical Analyzer Measurement Microphone
Frequency Sweep
ML1 automatically triggers to a sweep
sequence with any step width and
records the frequency response. The
Minirator MR2 or MR-PRO may be used
as signal source. After capture all sweep
data is available.
THD+N
Supports Total Harmonic Distortion plus
Noise (THD+N) and 2nd to 5th selective
harmonic distortion as dB value or in %.
Input level and frequency measurement
runs in parallel and the balance indicator
fi nds defective cables.
Level
Continuously measures absolute input
levels either in volts, dBu or dBV
and the signal frequency. Relative
measurements are also supported.
Connecting MiniSPL further supports
basic SPL and LEQ measurements.
Polarity
Finding wrongly connected speakers is
as simple as moving ML1 into the sound
fi eld of the speaker under test and its
polarity will be displayed. The same
measurement through the XLR input is
ideal for cable tests.
Time Sweep
Intermittent faults are often hard to
fi nd. The time sweep records the RMS
level, frequency and the THD+N value
simultaneously, helping to monitor the
audio signal during a long period of
time for later analysis.
Scope
Provides a quick and robust look at the
waveform of the balanced audio signal,
quickly fi nding clipping amplifi ers
etc. The auto-scale and auto-trigger
functionality are normally only found
in expensive stand alone scopes.
NTI article codes
Minilyzer ML1 600 000 011
Minilyzer ML1 incl. MiniLINK USB PC Interface 600 000 030
Technical Data Minilyzer ML1
Measurements Level-RMS, Level-Relative, THD+N, k2...k5, vu+PPM,
Frequency, Polarity, Signal Balance Error, Frequency Sweep,
Time Sweep, 1/3rd Octave Spectrum, Scope,
AFILS measurements supported (with MiniLINK)
Level Units: dBu, dBV, VRMS Accuracy: ± 0.5 % @ 1 kHz
Flatness: ± 0.1 dB Bandwidth: 20 Hz to 20 kHz
Resolution: 3 digits (dB-scale) or 4 digits (V-scale)
Frequency Range: 10 Hz to 20 kHz
Resolution: 4 digits
Accuracy: < ± 0.1 %
THD+N including 2nd to 5th harmonics analysis
Meas. Bandwidth: 10 Hz to 20 kHz
Resolution: 3 digits (dB-scale) or 4 digits (%-scale)
Residual THD+N: balanced < -85 dB @ -10 dBu to +20 dBu
unbalanced < -74 dB @ 0 dBu to +14 dBu
vu & PPM (vu-Indicator and Peak Program Meter)
according to IEC 60268 and DIN 45406.
PPM Type I, IIa and Nordic. Both meters with adjustable
reference and with analog & numerical peak-hold readout.
Polarity Test Positive/Negative detection through internal microphone or
XLR/RCA connector. Checks polarity of midrange-speakers,
woofers and cables. MR2 or MR-PRO provides test signal.
Signal Balance Error Indication range 0.0 % to 100 %
Deviation from perfect balance in % or *1
Sweep Level vs. Frequency or
Level and THD+N and Frequency vs. Time
1/3rd Octave Spectrum acc. IEC 1260, class II and
ANSI S1.11-1976, class II from 50 Hz to 20 kHz,
Bargraph for Level RMS 20 Hz to 20 kHz
Scope Auto triggering, auto ranging, auto scaling
Filters Flat, A-weighting, C-message, Highpass
22 Hz / 60 Hz / 400 Hz, Voice bandpass, X-Curve-1
Technical Data Minilyzer ML1 + Acoustilyzer AL1
Input Connectors XLR balanced, RCA unbalanced
Input Impedance 40 kOhm balanced, 20 kOhm unbalanced
Input RMS +20 dBu balanced, +14 dBu unbalanced
(upper meas. limit) use Adapter -20 dB for balanced levels up to 40 dBu
Max. DC Input ±50 VDC
Residual Noise < 12 µV, XLR-input shorted
Internal Microphone Omni directional (for polarity and delay measurements only)
Monitor Output Jack 3.5 mm (1/8“), suitable for all common headsets
Display Backlit graphic LCD, 64 x 100 pixels
Batteries 3x AA batteries (alkaline)
Typical battery lifetime > 16 hrs
Dimensions (LxWxH) 163 x 86 x 42 mm (6.4" x 3.38" x 1.63")
Weight 300 g (10.5 oz) incl. batteries
Temperature 0° to +45° C (32° to 113° F)
Humidity < 90 % R.H., non condensing
Technical Data Acoustilyzer AL1
Sound Pressure Level • Leq, short-time Leq , Lmin, Lmax
• Timer for single and repeated measurements
• Dynamic range (using MiniSPL): 30 - 130 dBSPLA
• Filters: Flat, A- and C-weighted, X-Curve-1, RLB
• Logging of SPL/LEQ results into AL1 memory
• Wideband- and RTA values simultaneously available
Real Time Analyzer • 1/3 or full octave band resolution, class 0 fi lters
• SPL, LEQ and Max-Min display per band
• Fast logging of results to the PC
Zoom FFT • Real-time Zoom FFT with 50% overlapping, 93 Bins
• Frequency Range: 10 Hz - 20 kHz
• Resolution: 187.5 Hz to 0.73 Hz
Reverberation Time • 8 octave bands results, based on T20, according to
ISO3382. Automatic averaging with individual result
readout and storage
• Source signal: Gated pink noise (CD included)
Delay Time • Propagation delay between electrical and acoustical signal
input using built-in mic. Resolution < 0.1 ms, max time: 1 s
• Dedicated test signal: NTI chirp (CD included)
STIPA (Option) • Single value STI and CIS test result. Modulation indices
and individual band level results accessible. Error indicator.
• According to IEC 60268-16, 2003 release
• TNO verifi ed algorithm
• Post processing with recorded spectra supported
Electrical • Level RMS, THD+N, Frequency, Polarity
• Filters: Flat, A- and C-weighted, HP400, HP19k
PC Interface • MiniLINK USB interface with PC software and
interface cable included
Further technical data continued on next page.
NTI article codes
Acoustilyzer AL1 (MiniLINK included) 600 000 080
ML1-AL1 Firmware Crossgrade 800 000 012
(for all Minilyzer ML1 users, MiniLINK required)
STI-PA Measurement Option 800 000 013
Accessories for Acoustilyzer and Minilyzer
MiniSPL Battery powered
Measurement Microphone
NTI Art.No 600 000 022
Adapter -20dB
Electrical Attenuator
NTI Art.No 600 000 014
System Case
for Minstruments + Mic
NTI Art.No 600 000 020
Pouch for ML1/AL1
Soft pouch with belt-loop
NTI Art.No 600 000 012
MiniLINK USB PC Inter-
face for ML1, Software
NTI Art.No 600 000 033
AL1 ACOUSTILYZER
Real Time Analyzer
Reverberation Time RT60
Speech Intelligibility STIPA
Zoom FFT, Delay, THD+N, ...
Class 0 design
Long Battery Life (>16h)
The Acoustilyzer AL1 shares a common hardware platform with the Minilyzer ML1. It greatly expands the Minstruments family with
a comprehensive set of acoustical measurement functions. The practical blend of electrical and acoustical functions, combined with
computer connectivity through the standard USB interface positions AL1 to be an indispensable tool for every sound/system contractor,
installer and multi-media specialist. For existing Minilyzer users a Crossgrade package is offered.
MINILYZER ML1
Level: RMS, Rel, SPL, LEQ
THD+N, 2nd to 5th Harmonics
Frequency and Time Sweeps
Scope, vu+PPM, Polarity
Balanced & Unbalanced Input
High Accuracy (+/- 0.1dB)
The Minilyzer ML1 is a powerful, complete audio analyzer in a palm-sized format. Its comprehensive set of easy to access measurement
functions simplify the process of system verifi cation, diagnostics and repairs of even very complex audio installations. The smart user
interface aids operators of all skill levels by setting all ranges automatically and providing complete results on a single screen. The op-
tional MiniLINK USB interface supports data storage, documentation and fi rmware updates.
MiniSPL
1/2“ Measurement Mic
Battery Powered
Balanced Output
Omni-directional
Individually Adjusted
Auto Power-Off Control
The MiniSPL is the ideal accessory for the Acoustilyzer and
Minilyzer. Its self-powered design, the individual factory adjust-
ment and the auto power-off compel the MiniSPL to be an accu-
rate, easy to handle yet affordable measurement microphone.
Technical Data MiniSPL (NTI article code: 600 000 022)
Microphone Type 1/2“, omni-directional, pre-polarized condenser
free fi eld transducer
Sensitivity (20 ±2) mV/Pa, (-34 ±1) dBV/Pa @ 1 kHz, balanced output
Frequency Response 100 Hz - 1250 Hz ±1 dB
20 Hz - 20 kHz ±3 dB (IEC61672, class 2)
Peak Acoustic Input 130 dBSPL @ 1 kHz
Noise 30 dBSPL, A-weighted
Power Supply 1 x AA battery 1.5 V, battery lifetime typical 300 hrs
www.minstruments.com
NTI AG
Im alten Riet 102
9494 Schaan
Liechtenstein, Europe
Phone +423 / 239 60 60
Fax +423 / 239 60 89
info@nti-audio.com
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NTI Americas Inc.
PO Box 231027
Tigard, Oregon 97281, USA
Phone (503) 684-7050
Fax (503) 684-7051
americas@nti-audio.com
NTI Japan Limited
Ryogokusakamoto Bldg. 1-8-4
Ryogoku, 130-0026 Sumida-ku
Tokyo, Japan
Phone +81 / 3 3634 6110
Fax +81 / 3 3634 6160
okayasu@nti-japan.com
Minstruments, Acoustilyzer, MiniSPL, MiniLINK,
Minilyzer and Minirator are Trademarks of NTI.
All information subject to change without notice.
Measurement Microphone
MiniSPL
1/2“ Measurement Mic
Battery Powered
Balanced Output
Omni-directional
Individually Adjusted
Auto Power-Off Control
The MiniSPL is the ideal accessory for the Acoustilyzer and
Minilyzer. Its self-powered design, the individual factory adjust-
ment and the auto power-off compel the MiniSPL to be an accu-
rate, easy to handle yet affordable measurement microphone.
Technical Data MiniSPL (NTI article code: 600 000 022)
Microphone Type 1/2“, omni-directional, pre-polarized condenser
free fi eld transducer
Sensitivity (20 ±2) mV/Pa, (-34 ±1) dBV/Pa @ 1 kHz, balanced output
Frequency Response 100 Hz - 1250 Hz ±1 dB
20 Hz - 20 kHz ±3 dB (IEC61672, class 2)
Peak Acoustic Input 130 dBSPL @ 1 kHz
Noise 32 dBSPL, A-weighted
Power Supply 1 x AA battery 1.5 V, battery lifetime typical 300 hrs
www.minstruments.com
NTI AG
Im alten Riet 102
9494 Schaan
Liechtenstein, Europe
Phone +423 239 60 60
Fax +423 239 60 89
info@nti-audio.com
M
I 1
0.
08
NTI Americas
Phone +1 503 684 7050
Fax +1 503 684 7051
americas@nti-audio.com
NTI China
Phone +86 512 6802 0075
Fax +86 512 6802 0097
china@nti-audio.com
NTI Japan
Phone +81 3 3634 6110
Fax +81 3 3634 6160
japan@nti-japan.com
Minstruments, Acoustilyzer, MiniSPL, MiniLINK,
Minilyzer and Minirator are Trademarks of NTI.
All information subject to change without notice.
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