Manual

1.31.3
1.31.3
1.3
WarningsWarnings
WarningsWarnings
Warnings
In order to avoid any problems during the operation of the instrument,
follow the rules listed below:
• Read this manual thoroughly before you operate the
instrument for the first time.
• Use the instrument for the intended purpose only.
• Never connect the instrument to a high voltage output such
as a power amplifier, mains power plug, etc.
• Do not disassemble the instrument.
• Never use the instrument in a damp environment.
• Remove the batteries as soon as they are flat or if the
instrument is not intended to be used for a longer period of
time.
1.41.4
1.41.4
1.4
OverviewOverview
OverviewOverview
Overview
The Minilyzer ML1 is a sophisticated audio test instrument, supporting a
wide range of useful measurement functions. The results are displayed
on a large LCD with backlight:
• Level RMS, Relative or SPL (Sound Pressure Level)
• THD+N (Total Harmonic Distortion + Noise)
• vu-Indicator and PPM (Peak Program Meter)
• Frequency
• Polarity Test (in combination with NTI’s Minirator MR1)
• Signal Balance Error
• Sweep recording with respect to frequency or time
• 1/3
rd
Octave Spectrum RMS or SPL
• Scope
Additionally, several input filters are available, depending on the active
measurement function:
• A-weighting acc. IEC 60651
• C-message acc. CCIR 468-4
• 22 Hz Highpass acc. DIN 45045, -120 dB / dec.
• 60 Hz Highpass acc. DIN 45045, -120 dB / dec.
• 400 Hz Highpass acc. DIN 45045, -120 dB / dec.
• Voice Bandpass acc. ITU-T P.48
• C-weigting acc. IEC 60651
• X-Curve
-1
acc. ISO 2969
The X-Curve
-1
filter is especially applicable for the recording, monitoring
and play-back of wide range soundtracks in indoor theatres, review
rooms or cinemas. To measure the acoustic response in such rooms
e.g. the Minirator MR1 shall be used with the pink noise signal selected.
Via the Minilyzer the 1/3
rd
octave spectrum has to be recorded using
the X-Curve
-1
filter. According the ISO-norm the result shall be a flat
graph (a continuous noise spectrum having constant energy per 1/3
rd
octave bandwidth).
A setup screen allows to adjust four settings according to the specific
demands of the user:
• Auto power off duration
• Auto backlight off duration
• LCD contrast
• Multiple setup (individual settings for up to 4 users)
Introduction Introduction
1-041-03