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      Series III
      Digital and Analogue Audio Analyzer
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      M1
      Digital and Analogue Audio Analyzer
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      dS-NET 16 x 2 I/O Switcher
    • VSIO adapterVSIO
      Digital Serial Interface Adapter
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      Filter for digital amplifier tests
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      Production Test System
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Applications: Education

A/D and D/A conversion Automotive Audio Bluetooth Audio Broadcast Computer Audio Education Electro-acoustics Home Entertainment Manufacturing Mobile Audio Music Industry Pro-Audio R&D Semiconductor Service

Education


A picture is worth 1000 words. Discuss.
If you want to see and understand audio concepts, a visual display of what is happening is the way to go. There's nothing quite like being able to see a waveform, its frequency spectrum, readings, bar-graphs, filters and more, all at once, and to hear the signal you are working on, all with real-time interaction.

Comparison of FFT windows and their resulting spectra with a sine wave
Comparison of FFT windows and their resulting spectra with a sine wave

Worked Example
Question: Explain the difference between THD+N and THD. Use words if necessary.

Answer:
THD+N filter THD+N filter

Heading into the unknown: user defined soft instruments
And what if you're doing a research project in audio? You may want to make a measurement that no-one has ever done before. dScope Series III may well be the way to do it. From its automation interface you can get at the sample buffers and the FFT magnitude and phase buffers, pre and post weighting filters. From there you can do what you like with the data - transform it, process it, extract data. The user defined FFT detector can be programmed to return a result that can then be used as any other FFT detector result: it can be swept, limit checked, used in regulation routines, etc. etc.

User FFT Detector
dScope Series III user programmed FFT detector showing the ratio of odd to even harmonics

Resources

+ LITERATURE
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dScope Series III Flyer - UK version
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dScope Series III Flyer - US version
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dScope Series III Flyer - Deutsch Version
+ WEBINARS
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Beyond THD+N: How does your power amplifier REALLY perform?
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Optimieren Sie die Qualitätsprüfung in der Produktion: Mit der Multi-Tone Messung zum High Speed Audiotest!
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Increase Your Throughput: High Speed Multi-tone Audio Test
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Evaluating Audio DACs: Performance, Diagnostics and Test Automation
+ APPLICATION NOTES
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Audio Multi-tone testing techniques
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Testing to AES17 standards
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Rapid Bin Centres Frequency Response Analysis
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Impulse Response Testing with dScope Series III
+ SCRIPTS AND AUTOMATION
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Generator sweep equalisation
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Settings report
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Auto Sequence 2033
+ QUICK STARTS
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Power Amplifier 1% THD+N regulated sweep
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Power Amplifier 1% THD+N regulation
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Power Amplifier Amplitude vs Frequency Sweep
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Bin-centres example
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DA converter test
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Digital Carrier Display
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Digital Interface Tests
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Power Amplifier gain vs frequency sweep
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Power Amplifier Nested THD+N vs Frequency sweep
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Digital non bit-transparent path tests
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Power Amplifier Nth harmonic vs frequency
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Power Amplifier THD+N vs Frequency
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Power Amplifier THD+N vs Power sweep
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Digital bit-transparent path tests

Relevant Products for Education applications

dScope Series III icon dScope Series III
Analogue & Digital Audio Test System
dScope Series IIIA icon dScope Series IIIA
Analogue Audio Test System
dScope Series IIIA+ icon dScope Series IIIA+
Analogue-Plus Audio Test System
dScope Series IIIE icon dScope Series IIIE
Digital and Analogue Essentials test system
Low Pass Filter icon Low Pass Filter
dS Low Pass Filter
VSIO Adapter icon VSIO Adapter
dS-NET VSIO Digital Interface Adaptor



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  Prism Media Products Limited trading as Spectral Measurement (formerly Prism Sound Test and Measurement); Registered in the UK, Reg. No. 2719511
  Address: Unit 1A, Grovemere House, Lancaster Way Business Park, Ely, Cambridgeshire, CB6 3NW, UK