Chapter 5 Web-Based Operations
86 Lynx II DSA User's Manual - 7096089
Analog Trace
The red trace of the digital oscilloscope can display any of the following reconstructed
analog signals:
• Energy – displays the reconstructed trapezoidal-shaped pulse output from the slow
shaper that has been derived from the incoming tail pulse.
• Fast Shaper – displays the initial signal produced by the incoming energy event
detected by the fast discriminator.
• Fast Threshold – displays the current DC level representing the lower-level
threshold of the fast discriminator. This value will vary when the threshold mode is
set to Automatic.
• ADC – displays the reconstructed tail pulse from the energy event that has been
digitized by the fast ADC.
• Slow Threshold – displays the current DC level representing the lower-level
threshold of the slow discriminator. This value will vary when the threshold mode is
set to Automatic.
Horizontal Scale (µS)
This setting sets the full scale range in microseconds of the digital graph’s X-axis for
both plots. Note that as the scale increases, the capture resolution will decrease.
Resolution is maximum when the Horizontal Scale is set to its minimum setting.
A shorter range is useful for close examinations of the signal processing; longer ranges
are useful when troubleshooting ground-loop signal noise issues.
Horizontal Delay (µS)
This setting sets the delay of the plot from the trigger in microseconds. This delay is
useful to observe events that occur prior to the trigger source.
Vertical Scale (%)
Adjust the Y-axis range on the analog (red) graph.
Vertical Offset (%)
Adjusts the Y-axis offset (DC baseline) on the analog (red) graph.
Overlay Previous Traces
When selected this setting provides a limited trace history with variable intensity, with
the brightest being the newest trace, for both analog and digital traces.
Average Sweeps
You can choose the number of sweeps (captures) to average; this is used to smooth the
analog trace and provide a more stable view. This feature may be useful when
optimizing pole/zero setting or examining the baseline’s noise characteristics.
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