EVAL-AD766XCB Datasheet, PDF (14/15 Pages) Analog Devices – Evaluation Board AD766X/AD767X

PRELIMINARY TECHNICAL DATA
EVAL-AD766XCB/AD767XCB
The results are displayed on this chart. You may also use the
cursor (yellow) and drag it to your desired location, where the
X-axis value and the Y-axis value will be displayed.
This is the control that allows you
the choice of either time domain
or frequency domain. You may
also change the X-axis unit here.
AC test results are shown here. You also have the
choice of viewing the amplitude of a certain FFT
component by changing the FFT component
menu.
Figure 10. FFT Screen
You may choose either a Kaiser window or a Blackmann-Har-
ris window or a Sync FFT from this menu. . When choosing a
Sync FFT, you will need to synchronize your analog source to
the sampling frequency. The input frequency should be the
value Sync Fr, which is to the right of Target frequency. The
process for this is as follows:
1. You Choose a Target frequency
2. The software calculates an integer n based on the target
frequency you entered and the sampling frequency, Fsamp.
3. The software rounds up the value n to the next prime
number.
4. The software then calculates the corresponding input fre-
quency (Fin) and displays that as Sync Fr.
The equation, (capture window size) is shown below:
(1/Fsamp) * (number of samples) = n * (1/Fin)
–14–
REV. PrK