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Minstruments Workshop 13. March 08, Frankfurt The New Generation Of Audio Signal Generators.

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Presentation on theme: "Minstruments Workshop 13. March 08, Frankfurt The New Generation Of Audio Signal Generators."— Presentation transcript:

1 Minstruments Workshop 13. March 08, Frankfurt The New Generation Of Audio Signal Generators

2 PLS 2008Minstruments Workshop2 New Signal Generators Minirator MR-PRO Digirator DR2 Minirator MR2 Available now!

3 PLS 2008Minstruments Workshop3 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

4 PLS 2008Minstruments Workshop4 Analog Audio

5 PLS 2008Minstruments Workshop5 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

6 PLS 2008Minstruments Workshop6 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

7 PLS 2008Minstruments Workshop7 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 - Output level range: dBu - Residual distortion (internal noise): -96 dBu -> minimum S/N -80dBu = 16dB Minirator -40dB Adapter

8 PLS 2008Minstruments Workshop8 Application for -40dB Adapter Output level = -60 dBu S/N ratio = 26 dBu Adjusted level = -20 dBu Actual output level after -40dB Adapter= -60 dBu S/N ratio = 66 dBu + =

9 PLS 2008Minstruments Workshop9 MR-PRO Measurements Measurement Functions: Phantom Power Balance Indication New: Detailed XLR Cable Tester New: Impedance + Phase New: Apparent Power + Phase

10 PLS 2008Minstruments Workshop10 MR-PRO Measurements MR-PRO measures Phantom Power Phantom Power should be 48V +/- 10%. Application: Checking inputs of mixing console. Channel 1: Phantom Power is 42.6V instead of 48V Mixing console

11 PLS 2008Minstruments Workshop11 MR-PRO Measurements Minirator MR-PRO measures Balance Impedance Application: Checking inputs of mixing console. Channel 1: okChannel 2: defective Mixing console with defective channel 2

12 PLS 2008Minstruments Workshop12 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

13 PLS 2008Minstruments Workshop13 Detailed Cable Test Works perfectly on open ended cables XLR Out XLR In Cable MR-PRO R3 = 2k R2 = 1k MR-PRO Remote Plug Detailed XLR-cable test fault information

14 PLS 2008Minstruments Workshop14 Impedance Measurements Minirator MR-PRO V2.01 measures Impedance Phase XLR Out MR-PRO C = 56 nF R = 10 kohm Applications Frequency crossovers Electronic circuits

15 PLS 2008Minstruments Workshop15 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

16 PLS 2008Minstruments Workshop16 Distributed Systems, 100V 100 Volt Amplifier max. 100 Volt Distributed speaker system 2 W

17 PLS 2008Minstruments Workshop17 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

18 PLS 2008Minstruments Workshop18 Impedance Measurements MR-PRO Firmware V2.01 offers Impedance measurement with - Apparent Power + Phase MR-PRO measurement unit VA Watt [W] VoltAmpere [VA]

19 PLS 2008Minstruments Workshop19 100V Loudspeaker Systems Always disconnect the 100V amplifier for impedance / power measurement with MR-PRO! 100 Volt Amplifier

20 PLS 2008Minstruments Workshop20 100V Loudspeaker Systems 100V Speaker System Power rating: 2 W, 1kHz Transformer impedance = 5 kohm MR-PRO measures Accurate Impedance = 5.2 kohm Phase = 13° inductive Power ~ 2 VA (calculated by P = U 2 /R = 100V 2 /5200)

21 PLS 2008Minstruments Workshop21 100V Loudspeaker Systems 100V Speaker System Power rating: 2 W Transformer impedance = 5 kohm Power ~ 6 VA max. 100 Volt 2 W

22 PLS 2008Minstruments Workshop22 100V Loudspeaker Systems Sample problems onsite: Speakers not connected Speakers wrongly connected or other electric devices connected Connection to wrong transformer taping, e.g. 1W instead of 2W only 2 of 3 speakers connected one speaker wrongly terminated, 1W instead of 2W

23 PLS 2008Minstruments Workshop23 100V Loudspeaker Systems Sample problems onsite: Short Circuits Mains Power Supply, use accessory MR-PRO 70/100V Protection Other external voltages, such as fire alarm devices connected Bad connection cables short circuit of speaker terminals

24 PLS 2008Minstruments Workshop24 100V Loudspeaker Systems Sample problems onsite: Vibration and environment noise in the speaker area effects speaker impedance. Solution: The MR-PRO impedance measurement includes appropriate technology for stable readings in noisy environments. MR-PRO features stable impedance reading

25 PLS 2008Minstruments Workshop25 100V Loudspeaker Systems Line 2 Line 1 wrongly connected max. 100 Volt

26 PLS 2008Minstruments Workshop26 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.

27 PLS 2008Minstruments Workshop27 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. 100V Protection (adapter with fuses) 100 Volt Amplifier max. 100 Volt

28 PLS 2008Minstruments Workshop28 Application Minirator with Acoustilyzer High-resolution Frequency Response

29 PLS 2008Minstruments Workshop29 High-res Frequency Response High-resolution frequency response up to 0.7Hz steps Audio Amplifier MR-PRO with Chirp Signal Acoustics measured by Acoustilyzer AL1 FFT mode - LEQ

30 PLS 2008Minstruments Workshop30 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

31 PLS 2008Minstruments Workshop31 Application Minirator with Acoustilyzer Reverberation Time RT60 with 1/3rd octave resolution

32 PLS 2008Minstruments Workshop32 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 octave resolution Reverberation time RT60

33 PLS 2008Minstruments Workshop33 RT60 in 1/3 Octave Resolution New test signals extend the RT60 measurement to 1/3 octave resolution.

34 PLS 2008Minstruments Workshop34 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

35 PLS 2008Minstruments Workshop35 RT60 in 1/3 Octave Resolution Reverberation Time RT60 with 1/3rd octave resolution MR-PRO with 1/3 octave Pink Noise Signal Acoustilyzer AL1 measures RT60 Audio Amplifier

36 PLS 2008Minstruments Workshop36 RT60 in 1/3 Octave Resolution Carry out individual RT60 measurements and load test results into automated Excel-sheet. Test 1: Test 2: Test 3:

37 PLS 2008Minstruments Workshop37 Summary

38 PLS 2008Minstruments Workshop38 Acoustic Set Pro Minirator MR-PRO Acoustilyzer AL1 MiniSPL Cable Test Plug Mains Power Adapter MR-PRO Adapter -20dB Minstruments Case

39 Thank you.

40 PLS 2008Minstruments Workshop40 Digital Audio Set 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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