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Minstruments Workshop 13. March 08, Frankfurt

Minstruments Workshop 13. March 08, Frankfurt. The New Generation Of Audio Signal Generators. New Signal Generators. Available now!. Minirator MR-PRO. Minirator MR2. Digirator DR2. Index. 1st Part: Analog Audio Minirator MR-PRO New Firmware and Accessories

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Minstruments Workshop 13. March 08, Frankfurt

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  1. Minstruments Workshop13. March 08, Frankfurt The New Generation Of Audio Signal Generators

  2. New Signal Generators Available now! Minirator MR-PRO Minirator MR2 Digirator DR2 Minstruments Workshop

  3. 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 Minstruments Workshop

  4. Analog Audio Minstruments Workshop

  5. 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 Minstruments Workshop

  6. 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 Minstruments Workshop

  7. New Minirator Accessory • Minirator -40dB AdapterAttenuator for high quality microphone level signals (increases signal-noise ratio) Applicable for MR2 and MR-PRO.The MR-PRO specifications are- Output level range: -80 .. +18 dBu- Residual distortion (internal noise): -96 dBu-> minimum S/N ratio @ -80dBu = 16dB Minirator -40dB Adapter Minstruments Workshop

  8. 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 Minstruments Workshop

  9. MR-PRO Measurements Measurement Functions: • Phantom Power • Balance Indication • New: Detailed XLR Cable Tester • New: Impedance + Phase • New: Apparent Power + Phase Minstruments Workshop

  10. Mixing console 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 Minstruments Workshop

  11. MR-PRO Measurements Minirator MR-PRO measures • Balance • Impedance Application: Checking inputs of mixing console. Channel 1: ok Channel 2: defective Mixing console with defective channel 2 Minstruments Workshop

  12. 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 Minstruments Workshop

  13. 2 1 MR-PRO 3 • Detailed XLR-cable test fault information Detailed Cable Test Cable • Works perfectly on open ended cables R2 = 1k R3 = 2k MR-PRORemote Plug XLR In XLR Out Minstruments Workshop

  14. 2 1 MR-PRO 3 Impedance Measurements Minirator MR-PRO V2.01 measures • Impedance • Phase Applications • Frequency crossovers • Electronic circuits R = 10 kohm C = 56 nF XLR Out Minstruments Workshop

  15. 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 Minstruments Workshop

  16. 100 Volt Amplifier max. 100 Volt Distributed Systems, 100V Distributed speaker system 2 W 2 W 2 W Minstruments Workshop

  17. 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 Minstruments Workshop

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

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

  20. 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) Minstruments Workshop

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

  22. 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 Minstruments Workshop

  23. 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 Minstruments Workshop

  24. 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 featuresstable impedance reading Minstruments Workshop

  25. wrongly connected Line 2 Line 1 100V Loudspeaker Systems max. 100 Volt Minstruments Workshop

  26. New MR-PRO Accessory • MR-PRO 70/100V ProtectionProtects Minirator MR-PRO against accidentally applied voltages during impedance or power testing at distributed 70V/100V speaker systems. Minstruments Workshop

  27. 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 Minstruments Workshop

  28. Application Minirator with AcoustilyzerHigh-resolution Frequency Response Minstruments Workshop

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

  30. 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-PROChirp Signal on Minstruments Workshop

  31. Application Minirator with AcoustilyzerReverberation Time RT60 with 1/3rd octave resolution Minstruments Workshop

  32. RT60 Time 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. AL1 measures RT60 in octave resolution Reverberation time RT60 Minstruments Workshop

  33. RT60 in 1/3 Octave Resolution • New test signals extend the RT60 measurement to 1/3 octave resolution. Minstruments Workshop

  34. 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 Minstruments Workshop

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

  36. 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: Minstruments Workshop

  37. Summary Minstruments Workshop

  38. Acoustic Set Pro • Minirator MR-PRO • Acoustilyzer AL1 • MiniSPL • Cable Test Plug • Mains Power Adapter MR-PRO • Adapter -20dB • Minstruments Case Minstruments Workshop

  39. 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 Minstruments Workshop

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