User manual

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800 Series
2-10
Full Span
Set the span of the analyzer to the maximum.
Zero Span
Set the span of the analyzer to 0 Hz. 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.
Key Points:
As opposed to the Non-zero span, the screen shows the time domain
characteristics of the fixed frequency component in zero span mode.The following
functions are invalid in Zero span mode:
 FREQ: Peak->CF and Signal Track;
 SPAN: Zoom In and Zoom Out;
 Marker->: Mkr->CF, Mkr->Step, Mkr->Start, Mkr->Stop, MkrΔ->CF and
MkrΔ->Span;
 Marker  Readout: Frequency, Period and 1/ΔTime (valid in Delta marker
type);
 TG: Power Sweep.
Zoom In
Set the span to half of its current value. At this point, the signal on the screen is
zommed in on to observe signal details.
Zoom Out
Set the span to twice the current value. At this point, the signal on the screen is
zoomed out on to gain more information about the signal.