Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
164
User Manual 1321.1011.02 ─ 11
1. Select "Select Time Line" softkey.
The R&S Spectrum Rider opens an input field to define the position of the first
time-line (T1).
2. Position the time line by entering a number or moving it with the rotary knob.
Entering the value "0" sets the time line marker on the most recent frame. The
maximum value that you can enter is "1024". This is the maximum number of
frames that the R&S Spectrum Rider can store in its memory.
Note that not all frames are visible on the screen. If a frame is part of the history
outside the visible area, the time line is also not visible and you have to scroll
through the spectrogram to be able to see it again. See
The upper window displays the spectrum of the frame at the time-line position. By mov-
ing the time-line, you can thus browse through the history of spectra stored in memory.
In the marker information field, the R&S Spectrum Rider shows the timestamp of the
time-line.
The timestamp of the first time-line (T1) is always referred to the top-most frame (e.g. a
timestamp of 00:00:50:000 means that the data was measured 50 seconds before the
topmost frame).
1. Select "Select Time Line" softkey again.
The R&S Spectrum Rider opens an input field to define the position of the second
time-line (T2).
2. Enter a number with the number keys or use the rotary knob to adjust the time line.
The R&S Spectrum Rider positions the second time line on the selected frame.
Again it shows the timestamp of the time line in the marker information field (ΔT
value). For the second time line (T2), the information is relative to the first one (T1).
This means that the timestamp of the second time line can be negative, if you have
set it on a frame above the first time-line.
If you scroll the time line through the frames of the spectrogram with the rotary knob,
the R&S Spectrum Rider shows the spectrum corresponding to the selected frame in
the upper window of the display.
You can use the spectrogram playback for a detailed analysis of the signal levels over
time and compare signal details in the spectrum result display, e.g. with the help of
markers.
In addition to the time line (horizontal marker), you can also use (vertical) markers in
the spectrogram.
With the help of the marker and the time line, you are able to find the exact moment
when a specific event has occurred in the spectrum.
1. Press [MARKER] key.
The R&S Spectrum Rider activates a marker and sets it on the peak level of the
currently displayed spectrum.
Performing Spectrum Measurements
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