Wander gamut display
AssigneeTektronix, Inc.
InventorDaniel G. Baker
Life of this patent
Estimating the term…
Abstract
A wander gamut display for perturbation analysis is created by determining from a periodic input data signal and a reference clock a frequency offset and frequency drift rate for the input signal. The frequency offset and frequency drift rate are input to respective orthogonal axes of a Cartesian display together with a wander limit bounding box that defines the wander gamut. Values that fall outside the bounding box on the display indicate wander that may result in data errors.
Claims6
A method of displaying timing perturbation analysis information comprising the steps of:
- determining frequency offset and frequency drift rate values by low pass filtering an input signal below a demarcation frequency;
- and
- providing a Cartesian plot of frequency offset versus frequency drift rate, the Cartesian plot including limits for the frequency offset and frequency drift rate values that define a central bounding box.
A method of displaying frequency offset and frequency drift rate data produced by a wander measurement instrument comprising the steps of:
- calculating the frequency offset and frequency drift rate data by low pass filtering an input signal below a demarcation frequency;
- and
- displaying the frequency offset and frequency drift rate data on a Cartesian plot of frequency offset versus frequency drift rate, the Cartesian plot including limits for the frequency offset and frequency drift rate values that define a central bounding box.
Dependencies are inferred from the claim text.