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SIGLENT
96 User Manual
6.1.2.2 Full Span
Set the span of the analyzer to the maximum available frequency span.
6.1.2.3 Zoom In
Set the span to half of its current value. At this point, the signal on the screen will be amplified to observe
signal details.
6.1.2.4 Zoom Out
Set the span to twice the current value. At this point, the signal on the screen will be reduced to gain
more information about the nearby spectrum. This setting is invalid under the maximum real-time
analysis span.
6.1.2.5 Last Span
Set the span to the previous span setting.
6.1.3 Amplitude
Set the amplitude parameters of the analyzer. Through modifying these parameters, signals under
measurement can be displayed in a proper mode for easier observation and minimum error.
6.1.3.1 Ref Level
Set the maximum power or voltage that can be currently displayed in the trace window. The value is
displayed at the upper left corner of the screen grid.
The maximum reference (Ref) level available is affected by the maximum mixing level; input attenuation
is adjusted under a constant maximum mixing level in order to fulfill the following condition:
Ref <= ATT - PA - 20dBm, where ATT = Attenuation value, PA = Preamplifier value
The reference level is an important parameter of the spectrum analyzer, which indicates the upper limit
of the current dynamic range of the spectrum analyzer. When the energy of the signal to be measured
exceeds the reference level, it may produce nonlinear distortion or even overload alarm.
It is necessary to know the nature of the signal to be measured and carefully select the reference level
to obtain the best measurement effect and protect the spectrometer.
Table 6-7 Ref Level
Parameter
Explanation
Default
0 dBm
Range
-200 dBm ~ 20 dBm
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