The Flat Top Window; The Uniform Window - HP 3563A Operating Manual

Using The Linear Resolution Mode
Window
Selecting a

The Flat Top Window

The flat top window compensates for the amplitude inaccuracy of the Hann with its slightly flatter
shape, as shown in figure 3-24. The trade-off is the loss of some frequency resolution due to its
.... idth.
The U n iform Window
The uniform mndow has a rectangular shape that weights all parts of the time record equally.
Because it does not force the signal to appear
mth functions that are self-mndomng, such as transients and bursts. The uniform mndow has
amplitude accuracy uncertainty up to 3.9 dB.
3-70
1. Narrow band correction factor
(area under square of line shape)
2. Amplitude accuracy uncertainty up to 0.01 dB
3. Normali zed in frequency domain
Frequency
Figure 3-24. The Flat Window
p
=
3.82
10 0.01
up
Frequency
eriodic in the time record, it is normally used only
dB