Keysight N9923-90001 User’s Guide189Data Analysis FeaturesAll about Trace MathAll about Trace MathTrace Math is available ONLY in CAT (excluding DTF measurements) and NAmodes.A trace is a series of measurement data points that are connected to form aline. This ‘live’ data trace is updated as data points are measured.A memory trace is a live trace that has been stored in the FieldFox volatilememory. It then becomes static, meaning it is not updated with measurements.It can be displayed on the screen by itself, or with a data trace for comparisonpurposes.— In NA mode, memory traces are the same color as data er).— In CAT mode and FOPS, the data trace is displayed in yellow and thememory trace is displayed in blue.How to display data and memory traces— Press Trace 6.— Press Data->Mem to store the ACTIVE data trace into memory. A ‘beep’sounds to confirm the data trace has been saved to memory. There is nodisplay annotation that indicates that the memory trace has been stored.— Press Data to view only the data trace.— Press Memory to view only the memory trace.— Press Data & Memory to view both the live trace and the storedmemory trace. Data&Mem is annotated in the left pane.How to perform Trace MathTrace math is performed between a live trace and a memory trace. When oneof the following math operations are selected, the yellow data trace displaysthe current measurement with the selected trace math applied. The mathoperation symbol indicated below in [brackets] is displayed on the lower leftcorner of the screen.— Press Trace 6.— If not already stored, press Data->Mem to store the current live trace intomemory.— Then Data Math.— Then choose one of the following:—Data + Memory [D+M] Current measurement data is added to the datain memory.—Data – Memory [D-M] Current measurement data is subtracted fromthe data in memory.
