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The Spectrum Application
FPC1000
65
User Manual 1178.4130.02 ─ 02
When you change a setting (for example the center frequency), the spectrogram
clears and starts to fill again.
4. You can also clear the spectrogram manually. Press the "Meas" key.
5. Select the "Clear" menu item.
Resetting the spectrogram
The R&S
FPC1000 clears the spectrogram result display when you change a mea-
surement setting, for example one of the frequency settings or the resolution band-
width.
You can also clear it deliberately.
1. Press the "Meas" key to open the measurement menu.
2. Select the "Clear" menu item.
The R&S
FPC1000 deletes the current spectrogram data and starts a new record-
ing.
Displaying the spectrogram in full screen
By default, the spectrogram takes half of the diagram area, with the upper part showing
the results of the current sweep as a line trace. You can view more of the signal history
by displaying the spectrogram in full screen mode.
1. Press the "Meas" key to open the measurement menu.
2. Select the "Full Screen" menu item.
The R&S
FPC1000 now uses the full diagram area of the screen for the spectro-
gram. The number of lines in the spectrogram and therefore the displayed time
period more than doubles.
Note:
It can, however, be necessary that the spectrum result display is still visible
to evaluate measurement results. For this purpose, the spectrogram has an (invisi-
ble) scrollbar that you can use to scroll up and down the spectrogram to the frame
that you would like to see.
Scrolling through the spectrogram
As more and more lines are added to the spectrogram, older data is moved down until
it disappears from the visible spectrogram. The data itself is still available, but you
have to scroll through the spectrogram to see those parts of the spectrogram.
Arrows on the right side of the spectrogram indicate that more data than is visible on
the screen is available.
► Press the "Up" or "Down" cursor keys.
The R&S
FPC1000 scrolls through the spectrogram history.
The symbols on the right side of the spectrogram indicate the position of the spec-
trogram part currently displayed on the screen.
● A single down arrow in the right lower corner of the spectrogram indicates that
the uppermost frame still represents the most recently recorded trace.
Measurements and Result Displays
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