SPA-900 Series User Manual 30
2.1.2.2
Full Span
Set the span of the analyzer to the maximum.
2.1.2.3
Zero Span
Set the span of the analyzer to 0Hz. Both the start and stop frequencies will equal the center
frequency and the horizontal axis will denote time. The analyzer measures the time domain
characteristics of the amplitude of the corresponding frequency point on the input signal. In
process of using pay attention to the following points:
The following functions are invalid in Zero span mode: Peak ->CF, Signal Track, Zoom In and
Zoom Out.
Frequency: Peak->CF;
SPAN: Zoom In and Zoom Out;
Marker-> : M ->CF, M->CF step, M->Start Freq, M->Stop Freq,
△
M->CF and
△
M->Span;
Marker: Frequency, Period and 1/
△
Time(valid in Delta marker type);
2.1.2.4
Zoom In
Set the span to half of its current value. At this point, the signal on the screen is zoomed in to
observe signal details.
2.1.2.5
Zoom Out
Set the span to twice the current value. At this point, the signal on the screen is zoomed out to gain
more information about the signal.
2.1.2.6
Last Span
Set the span to the previous span setting.
2.1.2.7
X-Scale
Set the scale type of X-axis to Lin or Log.
In Log scale type, the frequency scale of X-axis is displayed in the logarithmic form.
If the scale type of X-axis is in the logarithmic type form, the scale type will be switched into Lin
when turning on Meas.
2.1.3 Amplitude
Set the amplitude parameters of the analyzer. Through modifying these parameters, signals under
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