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Block Diagram
The block diagram shows the signal flow of the ID as it proceeds from a high bandwidth source (white noise) through
a series of decreasing bandwidth processes, ending up with random quantized voltage steps.
White Noise
Sample/Hold
Level
Width
White
Mix
Digital
Filter
Out
Freq.
S/H
Clock
Quantizer
S/H
Quantizer
S/H Clock
Ext Clock
Window Comparator
Calibration
RT1
Noise Level:
If you have an oscilloscope, adjust for about +/-5V swing. Otherwise set to mid span.
RT2 Quantizer Scale Select:
This is set up with four zones equally spaced. From FCCW to CW, you can select:
chromatic (all the notes on a keyboard), major, minor and diminished.
RT3 + S2, DAC calibration:
This sets the maximum output voltage for the quantizer DA converter.
Set RT2 FCCW.
Remove power from the module. Push S2 and keep it pushed while you restore power. Release S2. Each push of S2
will now alternate between full scale output and “zero” output. Measure the full scale voltage at J10 Quantizer Out
and adjust RT3 for 2.740V. To restore normal module function, cycle the power once more. (Do not push S2).
Troubleshooting,
Repair, Warranty
If you encounter problems that you can’t solve, contact us, preferably via e-mail with a description of the problem.
Let us know what does and does not work. We can then help you get your module working. We can fix modules for
a minimum fee of $25.
The parts contained in this unit have been carefully selected and tested. They are guaranteed for 90 days from the
date of purchase.
