> Not quite so easy. First of all, this type of transient response > signal is not > well suited for FFT. Then, I am not sure the repeatability of the > signal is > valid to such a degree that an accurate curve is achieved.
If the chirp is just the startup behavior of an ordinary crystal oscillator, I don't see how it could help but be highly repeatable, given constant temperature, orientation and Vcc edge characteristics. A repetitive-sampling scope sounds like the right tool to use, triggered with a fast-rising Vcc edge. In fact, I'll bet that variations in Vcc slope are going to dominate any effects intrinsic to the 40 MHz oscillator itself, by at least a few orders of magnitude. Study the inputs to this device, not the outputs. -- john, KE5FX _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
