Rohde & Schwarz FPC1000, User Manual

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The Spectrum Application
FPC1000
64
User Manual 1178.4130.02 ─ 02
Selecting the spectrogram result display
1. Press the "Meas" key to open the measurement menu.
2. Select the "Measurement Mode" menu item to open the measurement mode menu.
3. Select the "Spectrogram" menu item.
The R&S FPC1000 starts the recording of the spectrogram.
By default, the spectrogram result display is made up out of two windows. The upper
window shows the measured spectrum as a line trace. The lower window shows the
measurement results in a spectrogram. The amount of information in the spectrogram
is restricted by the internal memory of the R&S FPC1000. The R&S FPC1000 can
store up to 1024 frames (= line traces). When the measurement runs longer, the oldest
frames are deleted. As the height of the display is smaller than 1024 pixels, some of
the data becomes invisible after a time (but remains in the memory).
● Spectrogram Recording .......................................................................................... 64
● Color Definition ........................................................................................................66
● Spectrogram Playback ............................................................................................69
9.2.3.1 Spectrogram Recording
When you are in continuous sweep mode, the R&S FPC1000 starts to record spectro-
gram data when you enter the spectrogram mode. You can see that the spectrogram
result display fills up, as each sweep adds an additional line to the spectrogram.
When you are in single sweep mode, the R&S
FPC1000 does not add a line to the
spectrogram until you initiate the next single sweep.
Controlling the spectrogram update
In continuous sweep mode, you can interrupt the spectrogram recording.
1. Press the "Meas" key to open the measurement menu.
2. Select the "Hold" menu item.
The spectrogram recording stops. No more new lines are added to the spectro-
gram.
The measurement itself, however, does not stop. The line trace in the spectrum
display is still updated continuously. If you want to stop the measurement com-
pletely, you have to stop it by selecting
single sweep mode . In that case, the
R&S FPC1000 finishes the current sweep and stops the measurement. It keeps
the spectrogram data that has already been recorded.
3. Select the "Hold" menu item again.
The R&S FPC1000 resumes updating the spectrogram.
The spectrogram result display is filled with new lines until you change a measure-
ment setting.
Measurements and Result Displays
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