Getting Started
R&S
®
ZNL/ZNLE
71
User Manual 1178.5966.02 ─ 07
3. Set the reference level to -25
dBm:
a) In the configuration "Overview", tap the "Amplitude" button.
b) In the "Value" field of the "Amplitude" dialog box, enter
-25
dBm
.
The display of the calibration signal is now improved. The maximum at the center
frequency (=calibration frequency) of 50
MHz becomes visible.
Figure 5-12: Calibration signal with optimized display settings
5.3.6.2
Displaying a Spectrogram
In addition to the standard "level versus frequency" spectrum display, the R&S
ZNL/
ZNLE 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 fre-
quency, 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.
1. Tap the "Overview" softkey to display the general configuration dialog box.
2. Tap the "Display Config" button.
The SmartGrid mode is activated, and the evaluation bar with the available evalua-
tion methods is displayed.
Trying Out the Instrument
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