Iwatsu DS-8814, Operation Manual

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F-14
FFT Waveform Data Saved as ASCII is Edited With Excel
Data saved in the ASCII format cannot be called by this product, however, this data can be
edited by using a software program such as Excel or Lotus on a nearby PC.
In the example below, a saved file is opened with Excel, and Data (dBm) is displayed with the
broken line graph of the graph wizard.
Frequencies corresponding to Data (dBm) are computed with the below formula.
Frequency corresponding to dBm value =Delta (Hz)
×
Address
Number of Files/ Size
FFT waveform data is saved in the specified device in a directory named FFT with the CSV
extension. With a floppy disk, FFT waveform data can be saved with File Nos. from 1 to 200.
With an ATA card, FFT waveform data can be saved with File Nos. from 1 to 9999.
Type of File File Size (When Step is 1.)
FFT waveform data with 1024 F Points 7kB
FFT waveform data with 4096 F Points 26kB