Rohde & Schwarz FPL1000 Series, Руководство пользователя

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
421 User Manual 1178.3370.02 ─ 03
Remote command:
[SENSe:]ADJust:CONFigure:HYSTeresis:UPPer
on page 647
Lower Level Hysteresis
When the reference level is adjusted automatically using the Auto Level function, the
internal attenuators and the preamplifier are also adjusted. To avoid frequent adapta-
tion due to small changes in the input signal, you can define a hysteresis. This setting
defines a lower threshold the signal must fall below (compared to the last measure-
ment) before the reference level is adapted automatically.
Remote command:
[SENSe:]ADJust:CONFigure:HYSTeresis:LOWer
on page 647
7.9 Marker Usage
Markers help you analyze your measurement results by determining particular values
in the diagram. Thus you can extract numeric values from a graphical display both in
the time and frequency domain. In addition to basic markers, sophisticated marker
functions are provided for special results such as noise or demodulation.
Markers in Spectrogram Displays
In the spectrogram result display, you can activate up to 16 markers or delta markers
at the same time. Each marker can be assigned to a different frame. Therefore, in
addition to the frequency you also define the frame number when activating a new
marker. If no frame number is specified, the marker is positioned on the currently
selected frame. All markers are visible that are positioned on a visible frame.
● Basics on Markers .................................................................................................421
● Marker Settings .....................................................................................................424
● Marker Search Settings and Positioning Functions .............................................. 430
● Marker (Measurement) Functions .........................................................................437
● How to Work With Markers ................................................................................... 457
● Measurement Example: Measuring Harmonics Using Marker Functions ............. 458
7.9.1 Basics on Markers
Some background knowledge on marker settings and functions is provided here for a
better understanding of the required configuration settings.
Markers are used to mark points on traces, to read out measurement results and to
select a display section quickly. R&S
FPL1000 provides 16 markers per display win-
dow. In the Spectrum application, the same markers are displayed in all windows.
●
The easiest way to work with markers is using the touch screen. Simply drag the
marker and drop it at the required position. When a marker label is selected, a ver-
tical line is displayed which indicates the marker's current x-value.
Marker Usage