R&S ZNB Series User Manual page 344

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R&S ZNB/ZNBT
"Trace Math" is enabled if the active data trace fulfills the conditions for evaluating the
mathematical relation. E.g., if no "User Defined" mathematical relation is defined, a
memory trace must be coupled to the active data trace, so that the R&S ZNB/ZNBT
can evaluate one of the relations "Data / <Mem>" or "Data - <Mem>".
Remote command:
CALCulate<Chn>:MATH:STATe
CALCulate<Chn>:MATH:FORMatted:STATe
Data / <Mem>, Data - <Mem> ← Complex Data/Formatted Data
Activates the mathematical mode with the corresponding trace mathematical operation.
The division (subtraction) is calculated on a point-to-point basis: Each measurement
point of the active trace is divided by (subtracted from) the corresponding measure-
ment point of the memory trace. If the memory trace represents the result of a previous
sweep with unchanged settings, the divided (subtracted) curve is typically centered at
1 / 0 dB (0). It shows the variation of the results in subsequent sweeps.
The result of the division is a mathematical trace and replaces the active data trace in
the diagram area. The mathematical trace is updated as the measurement goes on
and the analyzer provides new active trace data.
This function is disabled unless a memory trace is coupled to the active data trace.
Trace coupling ensures that the two traces have the same number of points so that the
mathematical trace is well-defined.
Remote command:
CALCulate<Chn>:MATH:FUNCtion
CALCulate<Chn>:MATH:FORMatted:FUNCtion
User Defined ← Complex Data/Formatted Data
Activates the mathematical mode and displays the mathematical trace defined using in
the "User Def Math" dialog (see
on page 344).
The mathematical trace replaces the active data trace in the diagram area; it is upda-
ted as the measurement goes on and the analyzer provides new active trace data.
Remote command:
CALCulate<Chn>:MATH:STATe
5.5.4.2 User Def Math dialog
The "User Def Math" dialog defines a mathematical trace for the active trace. Each
measurement point of the original trace is replaced by the corresponding point of the
mathematical trace.
Access: Trace – [Trace Config] > Math > Complex Data/Formatted Data section >
"Define Math..."
Depending on the section from where the dialog is opened, the calculation is either
based on unformatted or formatted trace data.
User Manual 1173.9163.02 ─ 62
Chapter 5.5.4.2, "User Def Math
GUI reference
Trace Config softtool
dialog",
344