Agilent Technologies ESA-E Series User And Programming Manual page 48

Making Modulation Analysis Measurements
Interpreting Measurement Results
5. Press
EVM graph is highlighted. Press
expand the y-axis scale. Press
x-axis scale. The result of a "normal" signal is shown in
(W-CDMA signal shown with filter α = 0.22.)
Zoomed EVM Display of Signal Using a 0.22 Filter α
Figure 4-13
6. In contrast, refer to
filter α = 1.)
Differing filter alphas between the transmitter and receiver do not
significantly affect the symbol locations. However, differing alphas
do cause incorrect transitions. As a result, the error vector is large
between symbol points and relatively small at the symbol locations
(item 1.)
34
View/Trace, I/Q Error (Quad View).
Figure 4-14
Press
Next Window
Zoom, Amplitude, Scale/Div, 6, %
SPAN, Scale/Div, 1, Sym
(W-CDMA signal shown with
until the
to
to expand the
Figure 4-13
Chapter 4