Lesson 7 – Executing the DAC Distortion Test
The I
column shows the type and origin of the resulting
NFO
harmonic frequencies. The harmonics for two fundamentals are
calculated according to:
Abbrev.
Meaning
F
Fundamentals (generated
signal frequencies)
D 2
2nd order distortion
D 3
3rd order distortion
I 2
2nd order intermodulation
I 3
3rd order intermodulation
Harmonics Calculation for 2 Fundamentals
286
Formula for 2 Fundamentals
F1 , F2
2 * F1 , 2 * F2
3 * F1 , 3 * F2
| F1 ± F2 |
| F1 ± 2 * F2 |, | 2 * F1 ± F2 |