This page provides access to Flash screencasts (with audio) that demonstrate the new WaveVision5 software. They are just a few minutes each and cover a range of topics from the basic operation to more complex features.
You may add these tutorials to your WaveVision 5 Help menu by downloading and running this installer (WaveVision 5 must be installed first).
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Overview (3:08 mins)
The WaveVision 5 user interface provides powerful functions for evaluating data converters. This overview will demonstrate the basic functionality necessary to capture and view time domain plots and FFTs.
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Displaying Information on Plots (2:26 mins)
WaveVision 5 supports many options for displaying measurement data and annotating plots. This tutorial shows how to use some of these options.
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Continuous Capture and Averaging (3:53 mins)
Continuous waveform capture and averaging are powerful ADC analysis tools. When a signal is exactly centered in an FFT bin the rectangular window (the same as no window) may be used. When it is not possible to center the signal in an FFT bin a different window must be used to get valid results. This tutorial uses continuous capture to demonstrate the trade-offs of various FFT window functions. Averaging is also used to provide a better view of spurs and harmonics.
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Working with Multiple Channels (4:06 mins)
WaveVision 5 supports up to 4 channels or traces in the same plot. In this tutorial a variable gain amplifier will be adjusted and data captured into four traces. The traces will be compared and the associated conditions saved with the channels. Overall conditions will be saved with the collection of channels and saved in a plot. This is a powerful method for saving setup or circuit information along with the associated data for later review.
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Input Signal Conditioning (2:17 mins)
The key to making accurate ADC measurements is proper input signal conditioning. The benefits of lowpass and bandpass filters are clearly shown in this tutorial.
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FFT Exclusion Masks (2:17 mins)
FFT Exclusion Masks can be used to remove the effect of noise and spurs that may be setup related rather than ADC related. This tutorial explains how to use exclusion masks and provides some examples of when they might be applied.
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FFT Window Gain ( 2:56 mins)
Bin-centered or coherent input frequencies provide the best ADC measurement results. When this is not possible, FFT windows must be used to obtain valid measurement results. This tutorial examines the effect of windowing on the signal amplitude and how WaveVision 5 compensates for the window gain. All the signal energy for a coherent (bin-centered) signal will fall in a single FFT bin. When a window is used the energy will be spread into multiple bins and the peak amplitude will decrease. We apply the window gain (how much the amplitude drops) to always set the fundamental to the same level regardless of the window. This will also adjust the noise level so the displayed average noise may not line up with the FFT noise floor. The displayed average noise (in the FFT readouts and the line on the plot) will be accurate even if the displayed FFT noise level is a little bit different.
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Please use the 'Send Problem Report' facility in WaveVision 5 to let us know if you experience any quality issues when viewing these screencasts.
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