Calibration of Software/Measure activity

[Ian Daniher]

As work on a USB ADC continues, somewhere along the lines the problem of
calibration came up both with regards to the sound card, and the
in-development peripheral.
It was quickly suggested that a crystal oscillator based circuit be used to
generate square waves to help calibrate the time scale of the measure
activity.
This might also help calibrate voltages, as well.
I bounced this suggestion off the ##electronics guys and the conversation
went something like this:
(02:10:12 PM) *DyDisMe:* Crystal oscillators generate square wave pulses,
right?
(02:10:19 PM) SpeedEvil: depends
(02:10:29 PM) SpeedEvil: you can get them producing anything from squarewave
to sine
(02:10:43 PM) SpeedEvil: to some sort of rectangle poorly specified.
(02:11:00 PM) *DyDisMe:* I'm attempting to come up with a method of cheap
calibration
(02:11:10 PM) SpeedEvil: For what?
(02:11:16 PM) *DyDisMe:* the soundcard of the hardware I'm developing for is
built with 5% parts.
(02:11:17 PM) icee: most oscillators you buy put out squarewave though
(02:11:20 PM) icee: oscillator modules
(02:11:22 PM) *DyDisMe:* ok
Anyone have suggestions, questions, comments, etc?
-- 
Ian Daniher
it.daniher at gmail.com
Skype : it.daniher
irc.freenode.com: DyDisMe
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