The Spectrum Application (RF Measurements)
R&S
®
FPL1000
403
User Manual 1178.3370.02 ─ 09
In the new 3-dimensional spectrogram, the power is indicated by a value in a third
dimension, the z-axis. The color mapping is maintained for the point in the 3-dimen-
sional result display.
This new display provides an even better overview of how the strength of the signal
varies over time for different frequencies.
Figure 7-56: Three-dimensional spectrogram
The number of frames displayed on the time (y-)axis is user-definable, whereas for 2-
dimensional spectrograms, the number of frames is determined automatically accord-
ing to the size of the window. All other spectrogram settings are identical for 3-dimen-
sional and 2-dimensional spectrograms.
When the measurement is stopped or completed, the currently selected frame is indi-
cated by a gray vertical plane. (As opposed to the small white arrows at the borders of
the 2-dimensional display.) The spectrum diagram always displays the spectrum for the
currently selected frame.
By default, the most recently recorded frame (frame 0) is selected, and added at the
front of the diagram.
Rotating the spectrogram in three dimensions
Depending on which aspect of the spectrogram is currently of interest, you can rotate
the display to have a closer look at the frequency, the time, or the power dimension.
Simply drag your finger or the mouse pointer over the spectrogram in the direction you
want to rotate it. You can rotate the display left or right, up and down. Note, however,
that the degree of rotation is restricted in the upward direction to avoid confusing
Trace Configuration
