Keysight N9923A, Руководство пользователя, Страница: 189 / 276

Keysight N9923-90001 User’s Guide
189
Data Analysis Features
All about Trace Math
All about Trace Math
Trace Math is available ONLY in
CAT
(excluding DTF measurements) and
NA
modes.
A trace is a series of measurement data points that are connected to form a
line. 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 volatile
memory. 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 comparison
purposes.
— 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 the
memory 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 no
display 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 stored
memory trace.
Data&Mem
is annotated in the left pane.
How to perform Trace Math
Trace math is performed between a live trace and a memory trace. When one
of the following math operations are selected, the yellow data trace displays
the current measurement with the selected trace math applied. The math
operation symbol indicated below in [brackets] is displayed on the lower left
corner of the screen.
— Press
Trace 6 .
— If not already stored, press
Data->Mem
to store the current live trace into
memory.
— Then
Data Math
.
— Then choose one of the following:
—
Data + Memory
[
D+M
] Current measurement data is
added
to the data
in memory.
—
Data – Memory
[
D-M
] Current measurement data is
subtracted
from
the data in memory.