Monitoring Signal Characteristics
R&S
®
SMW200A
563User Manual 1175.6632.02 ─ 16
Figure 8-4: Eye diagram with partially closed eye (2FSK)
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
The display width is normalized for 2 symbols. It uses one-symbol "eye opening" in the
center of the display and 1/2-symbols to the left and right of the center eye for captur-
ing time transitions. Several hundreds curve segments are superimposed. The begin-
ning of the recording is synchronous to the symbol and chip clock pulse.
Application: To analyze amplitude and time distortion elements (e.g. jitter) at high-
speed digital data systems. A high quality, unimpaired signal should show a clearly
open eye (horizontally and vertically).
Signal acquisition points: See Table 8-2.
CCDF Display
The complementary cumulative distribution function (CCDF) displays the probability
with which the output signal exceeds the average power.
Displaying Baseband Signal Characteristics in Real-Time
To Next Page
Loading...
