SDA Operator’s Manual
Group Delay Compensation
Group delay is defined as the rate of change of the total phase shift with respect to angular
frequency through a device or transmission medium. An unavoidable consequence of correcting
for group delay is that preshoot and overshoot will be added to the signal.
The SDA 18000/13000/11000/9000 provides a control in the channel "Vertical Adjust" dialog that
allows you to choose between two group delay compensations.
Pulse Response - minimizes preshoot.
This selection is preferred in physics applications: no
"prediction" of the future event.
Eye Diagram - less overshoot.
This selection improves the accuracy of serial eye diagrams.
Flatness – like eye diagram.
This selection provides a flat frequency response.
SDA-OM-E Rev H 71
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