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Hey John, Thanks for the feedback. That is a great way to attack the problem. It was the method I had thought in my mind I wanted use, but just couldn't figure out the steps I needed to accomplish it. I ended solving the problem by getting the signal data from the scope and using labview to do...

Thanks for all the input. It looks like digitizing the signals with the scope to get the data and then attack it with the math is the best thing going. NAII says they have some new equipment that will do it. I bet it will...for a price$$$. Thanks again.

RSBUCK, Sounds like you know about navigation systems. I am only writing the test for the gyro toquer module in the system and am testing the precession stages later on, but these signals I am having issues with are the damped, torqued signals. I guess I will end up digitizing the signals and...

I can't subtract them because I need a point of reference. I can subtract them and get a nice sinusoid that is rotating at 3600Hz, but I have no way to determine the phase shift that occured when the waves were subtracted. Thanks for the suggestions though, it is a good one. I tried that first. ;)

This is not necessarily a communications situation, but I figure a good communications engineer might have a solution. I am trying to measure the phase difference between three signals. The signals are given mathematically by the equations: X = sin(2w) - cos(w) Y = -sin(-2w) - cos(w) Z =...

Sorry, but it is a real world problem. I am writing a test for an electronic module according to a test specification I was given. The signals are for a gyro with an XYZ coordinate system. There are several different stages that have only one harmonic, but there are 2 stages where there are 2...

I am trying to measure the phase difference between three signals. The signals are given mathematically by the equations: X = sin(2w) - cos(w) Y = -sin(-2w) - cos(w) Z = cos(2w) - cos(-w) where w = 1800Hz The 3 double frequnecy components are 120 +/- 12 degrees apart. The single frequency...