Sample Program : Total Harmonic Distortion (Thd) - Agilent Technologies 4396B Gpib Programming Manual

This program computes the total harmonic distortion (THD) as de ned by the following
equation:
Where,
Fundamental [V]
1
V
The second harmonic [V]
2
V
The third harmonic [V]
. .
3
V
.
THD takes into account the power in all the harmonics. Because an in nite number of the
harmonics cannot be measured, a nite number will have to suce.
Before running the program, measure the signal and display the fundamental and harmonics to
be computed on the analyzer display (in the dBm format).
d
Figure 11-2. Sample Program : Total Harmonic Distortion (THD) (1/2)
11-2 Using Application Programs
p
+ +
2 2
= V V
2 3
T H D
1
V
1 1 1
2
100 [%] (11 1)
a