Monitoring Signal Characteristics
R&S
®
SMW200A
598User Manual 1175.6632.02 ─ 30
Table 9-1: Graphics modes overview
Graphics modes Domain Measurement is known from
this instrument
I/Q Diagram Time Oscilloscope (standard mode)
Vector Diagram Time Oscilloscope (XY mode)
Constellation Diagram Time Oscilloscope (XY mode)
Eye Diagram Time Oscilloscope (triggered to symbol
clock and showing repetitive
traces)
CCDF Display Statistical representation of peaks Peak Power Analyzer
Power Spectrum Frequency Spectrum Analyzer
I/Q Diagram
The I/Q diagram displays the inphase component (i[t]) and quadrature component (q[t])
of the I/Q signal over time.
Figure 9-1: I/Q diagram with markers
= window with two separate coordinate systems with identical X and Y axes
X-axis = time represented as number of symbols, chips, or samples depending on the signal
Y-axis = amplitude, scaled to the peak envelope power; where minimum scaled amplitude = -1, maximum
scaled amplitude = +1
Application: To analyze impairments, fading, added noise and added signals (e.g.
from external baseband input) or from second path in the time domain. This mode
shows the signal like an oscilloscope.
Signal acquisition points: See Table 9-2.
Vector Diagram
The vector diagram displays the Q component over the I component. All points in the
complex domain are connected by lines.
Displaying Baseband Signal Characteristics in Real-Time
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