Don  Lancaster's Guru's Lair  SL-156Q JavaScript Magic Sinewave Calculator

This interactive demo lets you find values and explore numerical
tolerances on a 39 pulse Steplock-156 Magic Sinewave.

You can click here for Tutorials and further support.
You can click here for minor Design assistance.
You can click here for major Development assistance.

To find a magic sinewave:

Select the type of magic sinewave desired using the radio buttons.
Then click on the the Coarse Amp Adjust button.
Select the precision desired using the radio buttons.

Enter the desired amplitude (0.01 to 1.00) in the Target Amplitude box.
Or the desired power (0.0001 to 1.00) in the Target Power box.

If the present Fundamental is "far" from your Target Amplitude, OR
if you changed the type of magic sinewave selected, be sure to click the
the Coarse Amp Adjust button. Then click the Fine Amp Adjust button
repeatedly until the accuracy stops improving.

If the present Fundamental is "near" to your Target Amplitude, click the
Fine Amp Adjust button repeatedly until you get your desired accuracy.

The Delta Friendly 533 option is well behaved and recommended.


The quantization buttons added to this version will show the distortion
attainable for different amplitude storage bit lengths. Use these buttons
only AFTER optimization and reoptimize after each use.

Note that certain small values may appear in scientific notation.
You can scroll right to view the actual exponent if needed.

To explore magic sinewave tolerances:

Make a desired change in one or more of the pulse position degree values.
Press Recalculate to find the current amplitude and distortion levels.
Press Find Nearest MS to find the closest fitting magic sinewave.

To explore limiting data table amplitude accuracy:

Optimize the magic sinewave. Then click on ONE quantization button to view
the attainable distortion. Reoptimize before changing your quant selection.

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