Stanford Research Systems SR780, Operating Manual And Programming Reference

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3-14 Screen Display
SR780 Network Signal Analyzer
Horizontal Scale Bar
Figure Chapter 3 -6 Horizontal Scale Bar
The Horizontal Scale Bar is directly below the data graph.
When displaying spectral measurements with no horizontal expansion, these values are
the Start, Center and Stop frequencies of the measurement. When displaying time
records, these values are the Start and End of the time record.
Below the X-Axis labels, the measurement, view, window and averaging are shown.
These parameters may be different for each display.
The Average Count shows the number of measurements averaged so far (up to the
programmed Number of Averages). The Average Status shows ‘Done’ when a linear
average is complete. ‘Settle’ is shown when the displayed measurement is not settled and
is not added to the average. ‘Reject’ is shown when the Overload Reject is On and a
measurement is not included in the average due to input overload.
For Swept Sine measurements, the estimated Sweep Time is displayed instead of the
Average Count. This is the time to complete a sweep when no auto functions are selected
(no Source Auto Level, no Auto Range, no Auto Resolution). This Sweep Time is simply
the sum of the Settle and Integrate times for all points in the sweep.
To horizontally expand a graph, use <Pan> and <Zoom> in the [Display Setup] menu.
When the display is expanded on the horizontal axis, the graph labels reflect the
displayed data, not the actual measurement span or time. Expanded displays show the
‘Expand’ indicator.
Marker
Figure Chapter 3 -7 Marker Region
Measurement, View
and FFT Window
X-Axis Left Edge
X-Axis Right Edge X-Axis Center
Average Type
Average
Average Status
Zoomed
Graph
Marker located
at Max
Marker Region
defined by
solid vertical
lines.