julius wrote:
> You need to do some homework and derive it, there's a
> dependence on the pulse shape that you use in your
> modulation. It is commonly called the "gain" of the TED,
> and it can be derived from the S-curve, which is the expected
> output of the TED as a function of the true delay.
>
> Do you have references on the terms I used above?

For pulse shape think excess bandwidth. Gardner works great with large
excess bandwidth, and falls apart for very limited excess bandwidth.

In most practical cases, the result of the Gardner calculation should be
thought of as little more than a "go left" or "go right" indication.
Trying to use the actual magnitude of the result, rather than just its
sign, works fine in a sterile noiseless model. In the real noisy world
the impairments mean trying to scale the adjustment with the magnitude
of the result can be less than spectacularly successful.

Steve