I was hoping it would be simple enough to get the tick clock that RS uses, and then simply loop my script on every tick since that should be the smallest amount of time between data changing. But I guess I'll just have to try to get my loop to run in under 600ms so I can beat the clock.
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arbiter
You're dealing with a very simple signal here. Just follow Nyquist's sampling theorem (http://en.wikipedia.org/wiki/Nyquist_frequency) and you're in good shape.
arbiter
The tl;dr version is as long as your sampling frequency is double that of the highest component frequency of your signal then you will never alias. Since the signal you're dealing with is a super simple single component one with a frequency of 1/600ms or 1.67 Hz, make sure you are polling at double that @ 1/300ms or 3.33 Hz.