LeCroy DDA 7 Zi series, Operator'S Manual

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WavePro 7Zi
73
WP700Zi-OM-E-RevA
A practical example – DVI Data-Clock skew
The next example is a measurement of DVI Data-Clock skew jitter measurement, using a VBScript to emulate the
PLL. A solution to a practical measurement problem was shown earlier.
These are just a few of the many solutions that can be created.
Calling Excel Directly from the Oscilloscope
Excel can be directly called from the instrument in two ways:
Calling Excel: Description: Result:
Using a
function
F1 through
Fx
[The number of math traces available depends on the software options
loaded on your scope. See Specifications.]
Excel returns a
waveform
Using a
parameter P1 through
Px
[The number of parameters available depends on the software options loaded
on your scope. See Specifications.]
Excel returns a
parameter
In both cases, one call to Excel can use two separate waveforms as input.
PLEASE NOTE THE FOLLOWING:
x
Excel has a calculation algorithm of 64,000 points (32,000 if you have created a chart in Excel). Therefore,
make sure that your acquisition has less than this number of points if you are going to use an Excel
calculation.
x
To use this capability, you must have the LeCroy XMAP software option and Excel loaded in your
instrument. Select
Minimize from the instrument's File menu to access the Excel program directly.
How to Select a Math Function Call
The Excel math function is selected from the Math Operator menu, where it appears in the Custom group.
How to Select a Parameter Function Call
The Excel Parameter function is selected from the Select Measurement menu, where it appears in the Custom
group.
Excel Control Dialog
Once you have invoked an Excel call, you will see a dialog at the right of the screen, allowing you to control the
zoom, Excel properties, linking cells, and scale of the output trace from Excel: