Spectrum analysis
R&S
®
RTO6
390User Manual 1801.6687.02 ─ 05
Remote command:
CALCulate:
MATH<m>:
FFT:PHASe:THReshold on page 1577
9.2 Spectrum analysis (option R&S RTO6-K37)
This chapter describes the Spectrum analysis option R&S RTO6-K37.
9.2.1 Spectrogram display
The Spectrum analysis option provides a new diagram for spectrum waveforms: a
spectrogram. When you enable a spectrogram, three windows are displayed: the
power vs. time diagram at the top, the spectrogram in the middle (labeled "SG") and
the power vs. frequency (=spectrum) diagram at the bottom.
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 dif
ferent colors. Thus you can see how the strength of the signal varies
over time for different frequencies.
The spectrogram is updated with each data acquisition, from top to bottom, so that the
most recent trace is at the bottom. Up to two time lines can be shown at a specified
position so that you can analyze the spectrum at a specific point in time.
The spectrum diagram indicates the power vs. frequency values for a single data
acquisition. If a time line is enabled, the spectrum shows the results at the selected
time. Otherwise, the spectrum shows the results of the most recent data acquisition.
Spectrum analysis (option R&S R
T
O6-K37)
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