Keysight N9923-90001 User’s Guide187Data Analysis FeaturesAll about Limit LinesBuild From TraceA limit line can be built from an existing trace. One X/Y point is made from eachmeasured data point. Then, using an offset value, you can shift the limit line UPfor upper limits or DOWN for lower limits.Once limit lines have been built from the trace, changes that you make to thetrace, such as frequency range, do NOT change the limits. However, the limitline properties can be edited just like standard limit lines.Figure 12-6 A lower limit line (red) built from the trace (yellow) shifted down 5 dB.How to Build Limit Lines from a Trace— Select the trace from which limits will be built.— Press Limit 8.— Then Ed it Limits.— Then Build From Trace. A limit line table appears.— Use the arrows to select ON.— Use Offset to shift the limit line UP or DOWN. Learn how below.Limit OptionsHow to set Limit Options— Press Exit if the limit table is visible.Build from Trace is NOT allowed for traces with more than 1001 datapoints.
