Common Analysis and Display Functions
R&S
®
ESW
204
User Manual 1177.6298.02 ─ 08
Trace Mode
Description
Min Hold
The minimum value is determined from several measurements and displayed. The
R&S
ESW saves the measurement result in the trace memory only if the new value is
lower than the previous one.
This mode is useful for example for making an unmodulated carrier in a composite
signal visible. Noise, interference signals or modulated signals are suppressed,
whereas a CW signal is recognized by its constant level.
This mode is not available for statistics measurements.
View
The current contents of the trace memory are frozen and displayed.
If a trace is frozen ("View" mode), the measurement settings, apart from scaling set-
tings, can be changed without impact on the displayed trace. The fact that the dis-
played trace no longer matches the current measurement settings is indicated by a yel-
low asterisk on the tab label.
If you change any parameters that affect the scaling of the diagram axes, the
R&S
ESW automatically adapts the trace data to the changed display range. This
allows you to zoom into the diagram after the measurement to show details of the
trace.
11.3.1.3
Working with Spectrograms
In addition to the standard "level versus frequency" or "level versus time" traces, the
R&S
ESW also provides a spectrogram display of the measured data.
A spectrogram shows how the spectral density of a signal varies over time. The x-axis
shows the frequency, the y-axis shows the time. A third dimension, the power level, is
indicated by different colors. Thus you can see how the strength of the signal varies
over time for different frequencies.
Trace Configuration
