LeCroy DDA 7 Zi series, Руководство оператора

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WavePro 7Zi
273
WP700Zi-OM-E-RevA
Enabling Variable Gain
1. Touch the descriptor label for the waveform whose gain you want to vary.
2. Touch the Variable Gain check box.
Channel Deskew
Unlike the Deskew math function, channel Deskew does no resampling, but instead adjusts the horizontal offset
by the amount that you enter. The valid range is dependent on the current ti/- 9 divisions.
Channel Deskew Setup
1. In the menu bar, touch Vertical ; from the drop-down menu, select a channel to set up.
2. Touch inside the Deskew data entry field and enter a value using the pop-up numeric keypad.
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.
x
Pulse Response - A delay compensation that minimizes preshoot. This selection is preferred in physics
applications where there's no prediction of the future event.
x
Eye Diagram - Delay compensation with less overshoot. This selection improves the accuracy of serial
eye diagrams.
x
Flatness - A delay compensation similar to eye diagram, this selection provides a flat frequency response.