Agilent Technologies 93000 SOC Series Training Manual page 281

Test Methodology
This section specifies the processing of the captured data after
uploading and before performing any calculations.
You can specify averaging per waveform. This requires that you
source the same sine wave several times.
Calculation Parameter
D : This is the frequency range of the FFT results that
•
ISTORTION BW
is passed to the distortion calculation.
# : The number of harmonics to be used in the distortion
•
HARMS
parameter calculations (THD).
# : Enter the number of cycles in the captured waveform. As
•
CYCLS
the number of data points to be captured is even (2
of cycles should be odd in order to support coherent sampling.
F lets you define a larger part (more than one frequency
•
UNDWIDTH
bin) of the spectrum as part is the fundamental. Normally, the
fundwidth is set to 1 (one frequency bin), but it can be set to a
higher odd integer value (3, 5, 7, ...), if required.
Datalog
The D section provides checkboxes which allow to control
ATALOG
the storage of captured and calculated waveforms in the Event
Datalog file.
Lesson 7 – Executing the DAC Distortion Test
n
), the number
281