Ronde & Schwarz 1304.0004.03, User Manual

Page: 345 / 1076

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
345 User Manual 1178.3370.02 ─ 09
Changing the Automatic Measurement Time (Meastime Manual)
This function allows you to change the measurement duration for automatic setting
adjustments. Enter the value in seconds.
Note: The maximum possible measurement duration depends on the currently
selected measurement and the installed (optional) hardware. Thus, the measurement
duration actually used to determine the automatic settings may be shorter than the
value you define here.
Remote command:
[SENSe:]ADJust:CONFigure:DURation:MODE
on page 765
[SENSe:]ADJust:CONFigure:DURation
on page 764
Upper 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 an upper threshold the signal must exceed (compared to the last measure-
ment) before the reference level is adapted automatically.
Remote command:
[SENSe:]ADJust:CONFigure:HYSTeresis:UPPer
on page 765
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 765
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.
Marker Usage