Transcript MR2 / MR-PRO Introduction

Minstruments Workshop
13. March 08, Frankfurt
The New Generation Of
Audio Signal Generators
New Signal Generators
Available now!
Minirator MR2
PLS 2008
Minirator MR-PRO
Minstruments Workshop
Digirator DR2
2
Index
1st Part: Analog Audio
 Minirator MR-PRO
 New Firmware and Accessories
 Distributed Speaker Systems, 100V
 Applications MR-PRO and AL1
2nd Part: Digital Audio
 Introduction Digirator DR2
 Dolby Surround System Setup
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Analog Audio
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Introducing Minirator MR-PRO
Generator Functions:
 Sine, White / Pink Noise, Sweep,
Chirp, Delay, Polarity
 WAVE File Playback
- STI-PA, voice messages
- Sounds of music instruments
 Additional new wave files
- Band-limited 1/3 octave pink noise
- Square waves
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New MR-PRO Firmware V2.01
New Generator Features:
 Fine Volt adjustments (e.g. "100 mV")
 Configuration files may be renamed
when connected as a mass storage
device to a PC
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New Minirator Accessory
 Minirator -40dB Adapter
Attenuator for high quality microphone level
signals (increases signal-noise ratio)
Applicable for MR2 and MR-PRO.
The MR-PRO specifications are
Minirator
-40dB Adapter
- Output level range: -80 .. +18 dBu
- Residual distortion (internal noise): -96 dBu
-> minimum S/N ratio @ -80dBu = 16dB
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Application for -40dB Adapter
+
=
Output level = -60 dBu
Adjusted level = -20 dBu
S/N ratio = 26 dBu
Actual output level after
-40dB Adapter= -60 dBu
S/N ratio = 66 dBu
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MR-PRO Measurements
Measurement Functions:
 Phantom Power
 Balance Indication
 New: Detailed XLR Cable Tester
 New: Impedance + Phase
 New: Apparent Power + Phase
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MR-PRO Measurements


MR-PRO measures Phantom Power
Phantom Power should be 48V +/- 10%.
Application:
Checking inputs of mixing console.
Channel 1: Phantom Power
Mixing console
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is 42.6V instead of 48V
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MR-PRO Measurements
Minirator MR-PRO measures
 Balance
 Impedance
Application:
Checking inputs of mixing
console.
Mixing console with defective channel 2
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Channel 1: ok
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Channel 2: defective
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New MR-PRO Firmware V2.01
New Features:
 Detailed cable test fault information
 Impedance measurement screen with
- Impedance + Phase
- Apparent Power + Phase
 Faster impedance measurement
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Detailed Cable Test
Cable
MR-PRO
2
R2 = 1k
1
R3 = 2k
3
XLR Out
XLR In

Works perfectly on open ended cables

Detailed XLR-cable test fault information
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MR-PRO
Remote Plug
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Impedance Measurements
Minirator MR-PRO V2.01 measures
 Impedance

Phase

2
MR-PRO
Applications
 Frequency crossovers
Electronic circuits
R = 10 kohm
C = 56 nF
1
3
XLR Out
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Impedance Measurements



Tailored for testing 100V systems
Measurement frequency selectable 30 Hz … 10 kHz
Replaces common impedance meters
e.g. TOA ZM104 (320$) or Goldline ZM01, RCS ZS-2, Sennheiser
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Distributed Systems, 100V
Distributed speaker system
100 Volt Amplifier
max. 100 Volt
2W
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2W
2W
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Distributed Systems, 100V
 Advantage: 100V technology reduces line loses at long distances from
amplifier to speaker. The SPL of each single speaker can be adjusted
at the speaker. The amplifier output level is 100V at maximum load.
 70V systems:
- Power consumption of speaker is only 50% compared to 100V
- SPL reduced by 3dB
 50V systems:
- Power consumption of speaker is only 25% of 100V
- SPL reduced by 6dB
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Impedance Measurements
MR-PRO Firmware V2.01 offers
 Impedance measurement with
- Apparent Power + Phase

MR-PRO measurement unit VA
Watt [W]
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100V Loudspeaker Systems
Always disconnect the 100V
amplifier for impedance / power
measurement with MR-PRO!
100 Volt Amplifier
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100V Loudspeaker Systems
100V Speaker System
Power rating: 2 W, typically @ 1kHz
Transformer impedance = 5 kohm
MR-PRO measures
 Accurate Impedance = 5.2 kohm
 Phase = 13° inductive
 Power ~ 2 VA
(calculated by P = U2/R = 100V2/5200)
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100V Loudspeaker Systems
100V Speaker System
Power rating: 2 W
Transformer impedance = 5 kohm
Power ~ 6 VA
max. 100 Volt
2W
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2W
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2W
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100V Loudspeaker Systems
Sample problems onsite:
 Speakers not connected
only 2 of 3 speakers
connected
 Speakers wrongly connected or other
electric devices connected
 Connection to wrong transformer
one speaker wrongly
taping, e.g. 1W instead of 2W
terminated, 1W instead of 2W
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100V Loudspeaker Systems
Sample problems onsite:
 Short Circuits
short circuit of
speaker terminals
 Mains Power Supply, use accessory
“MR-PRO 70/100V Protection”
 Other external voltages, such as fire
alarm devices connected
 Bad connection cables
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100V Loudspeaker Systems
Sample problems onsite:
 Vibration and environment noise in the
speaker area effects speaker impedance.
MR-PRO features
stable impedance reading
 Solution:
The MR-PRO impedance measurement
includes appropriate technology for
stable readings in noisy environments.
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100V Loudspeaker Systems
wrongly connected
Line 2
max. 100 Volt
Line 1
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New MR-PRO Accessory
 MR-PRO 70/100V Protection
Protects Minirator MR-PRO against
accidentally applied voltages during
impedance or power testing at distributed
70V/100V speaker systems.
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Application of 100V Protection
MR-PRO is specified with
max. input level = 60 VDC.
During operation of speaker
system the line level is up to 100V.
100 Volt Amplifier
100V Protection
(adapter with fuses)
max. 100 Volt
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Application
Minirator with Acoustilyzer
High-resolution
Frequency Response
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High-res Frequency Response

High-resolution frequency response
up to 0.7Hz steps
Acoustics measured
MR-PRO with
by Acoustilyzer AL1
Chirp Signal
FFT mode - LEQ
Audio Amplifier
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High-res Frequency Response
High-resolution frequency response up to 0.7Hz steps:


MR-PRO Chirp Signal: Set start, - stop frequency and time
Acoustilyzer AL1 FFT-Mode: Set LEQ and Range and resolution
MR-PRO
Chirp Signal on
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Application
Minirator with Acoustilyzer
Reverberation Time RT60
with 1/3rd octave resolution
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RT60 in 1/3 Octave Resolution

The Acoustilyzer measures basically reverberation time RT60 in 8
octave bands in the range from 63 Hz – 8 kHz.
RT60 Time
AL1 measures RT60 in
Reverberation time RT60
octave resolution
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RT60 in 1/3 Octave Resolution

New test signals extend the RT60 measurement to 1/3 octave
resolution.
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RT60 in 1/3 Octave Resolution
MR-PRO offers additional test signals for extended 1/3 octave resolution.
How to do:

Load 1/3 octave pink noise test signals on MR-PRO
Test1_1/3_low:
pink noise spectra of the 1/3 octave bands
100Hz, 200Hz, 400Hz, 800Hz, 1.6kHz, 3.15kHz
Test2_1/3_mid:
pink noise spectra of the 1/3 octave bands
125Hz, 250Hz, 500Hz, 1.0kHz, 2.0kHz, 4.0kHz
Test3_1/3_hi:
pink noise spectra of the 1/3 octave bands:
160Hz, 315Hz, 630Hz, 1.25kHz, 2.5kHz, 5.0kHz
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RT60 in 1/3 Octave Resolution

Reverberation Time RT60
with 1/3rd octave resolution
Acoustilyzer AL1
MR-PRO with
measures RT60
1/3 octave Pink Noise
Signal
Audio Amplifier
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RT60 in 1/3 Octave Resolution
Test 1:

Carry out individual RT60
measurements and load test results
into automated Excel-sheet.
Test 2:
Test 3:
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Summary
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Acoustic Set Pro
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Minirator MR-PRO
Acoustilyzer AL1
MiniSPL
Cable Test Plug
Mains Power Adapter MR-PRO
Adapter -20dB
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Digital Audio Set

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Digirator DR2
Digilyzer DL1 with MiniLINK
Mains Power Adapter DR2
Mains Power Adapter DL1
DR2 Transformers AES3id
DL1 Transformers AES3id
Minstruments Case
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