Teledyne LeCroy DFP2 - Digital Filter Package 2 - Manual (Page 21)

DFP2 Option
923134 Rev A ISSUED: June 2013 19
Writing Data to a Data File
To write values from Mathcad to a data file, you can use the File Read/Write component, as
follows:
1.
Click in the blank spot in your worksheet.
2. Choose Component from the Insert menu.
3. Select File Read or Write from the list and click Next. This launches the first part of the File
Read or Write Setup Wizard.
4. Choose Write to a data source and press Next to go to the second page of the Wizard:
From the File Format drop-down list in this Wizard, choose Tab Delimited Text.
5. Type the path to the data file you want to write, or click the Browse button to locate it.
6. Press Finish. You'll see the File Read or Write component icon and the path to the data file.
In the place holder that appears at the bottom of the component, enter the transposed name
of the Mathcad variable containing the data that will be written to the data file. It is important
to transpose the variable (Ctl + 1) so that the variables appear in the correct order.
When you click outside the component, the values in the Mathcad variable will be written to the
filename you specified. Each time you calculate the worksheet, the data file is rewritten.
On the instrument, when the Custom filter kind is selected, a file selection box will appear. Select
the file saved from Mathcad; the coefficients will be used in the filter.
SPECIFICATIONS
•
The pass-band gain of all filters (except custom) is normalized to 1.
•
FIR Coefficients: 2001 max.
•
IIR Stages: 29 max.
•
Filter Kinds: high pass, low pass, band pass, band stop, raised cosine, raised-root cosine,
Gaussian, custom
•
IIR Filter Types: Butterworth, Chebyshev, Inverse Chebyshev, Bessel
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