Monitoring signal characteristics
R&S
®
SMM100A
424
User Manual 1179.1341.02 ─ 05
Figure 8-3: Constellation diagram (64 QAM)
X-axis, Y-axis = amplitudes of the signal components, scaled to the peak envelope power; where minimum
scaled amplitude = -1, maximum scaled amplitude = +1
Application:
To classify modulation.
Signal acquisition points:
See
.
Eye diagram
The eye diagram displays synchronized and superimposed sections of either the in-
phase or the quadrature components of the signal.
Figure 8-4: Eye diagram with partially closed eye (QPSK)
X-axis = time in the range of -/+ 1 symbol
Y-axis = amplitude, scaled to the peak envelope power; where minimum scaled amplitude = -1, maximum
scaled amplitude = +1
Displaying baseband signal characteristics in real-time