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Chapter 1
to auto scale the orange θ graph.
Touch
6.
Touch the green scale tile {X} to display its
scale palette.
Touch
to auto scale the green X trace.
7.
Touch the blue scale tile {Y} to display its scale
palette.
Touch
to auto scale the blue Y trace.
8.
Touch the yellow scale tile {R} to display its
scale palette.
Touch
to move the trace so the newest
points are vertically centered.
Touch
repeatedly to zoom in about the
center. Keep zooming in until the yellow trace
shows some noise. The scale will probably end
up less than 1 mV.
Getting Started
Touch
to auto scale a trace. Touch
auto scale while keeping zero in the center.
The phase is ramping from −180º to +180º so
the resulting scale is 50/div for a graph of
±200º.
Touch the orange scale tile again to dismiss the
scale palette.
Selecting a scale tile automatically dismisses
any other palette.
Touch a highlighted scale tile to simply dismiss
its palette leaving all palettes off.
The X and Y outputs are 0.2 Hz sine waves
with 500 mV amplitudes.
The magnitude R is phase independent and is a
straight flat line at about 500 mV.
By centering the trace, the zoom function will
expand the trace to reveal noise on R.
The little triangles along the right edge indicate
the zero for each data channel. Zooming in on R
moves the zero for R below the graph as
indicated by the downward facing yellow
triangle at the bottom right edge.
SR865A DSP Lock-in Amplifier
15
to
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