How to see the true clock period in TimeQuest?

--- Quote Start ---

A digital counter divides the clock *exaclty*. There's no error.

If you have a 40 ns clock and use counter of 256, you get a clock with 10240 ns period exactly.

If you have a 40.0001 ns clock, you get a clock with 10240.0256 ns period exactly.

The input clock may and will have fluctuations that will affect the generated clock.

The generated clock will also have higher jitter.

But period wise, the divider has zero error.

--- Quote End ---

Thanks very much, it seems my original understanding about counter to create the clock signal has problem. How can I check the clock jitter in TimeQuest?

Thanks again.