Agilent Technologies 8753ET Dokumentacja Pobierz pdf (Strona 245)

9-11

Understanding the CITIﬁle Data Format

Useful Calculations

This section contains information on computing frequency points and expressing CITIﬁle

data in other data formats.

Computing Frequency Points

In CITIﬁle, the frequency data is not listed point by point, only the start and stop values

are given. If you are using a spreadsheet program, you can create a new frequency column

to the left of the data pairs. Use the following formula to obtain each frequency point:

Fn = Fstart + {(n-1) * [(Fstop - Fstart) / (# of points - 1)]}

where:

Fstart = Start Frequency

Fstop = Stop Frequency

Fn = Frequency point with n being an integer

# of points = number of sample points per sweep

Here is an example of how this formula may be entered:

F1 = 30E3 + {(1-1) * [(6E9 - 30E3) / (201 - 1)]} = 30E3 = 30 kHz

F2 = 30E3 + {(2-1) * [(6E9 - 30E3) / (201 - 1)]} = 30E6 = 30 MHz

F201 = 30E3 + {(201 - 1) * [(6E9 - 30E3) / (201 - 1)]} = 6E9 = 6 GHz

Once these cells are entered, copy the formula to the remaining data points, and the

frequency will be indicated for each row.

1 2 ... 240 241 242 243 244 245 246 247 248 249 250 ... 261 262

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Agilent Technologies 8753ET Dokumentacja Strona 245