R&S ZNL, Руководство пользователя

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VNA GUI reference
R&S
®
ZNL/ZNLE
357 User Manual 1178.5966.02 ─ 19
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
Chapter 10.6.4.2, "User Def Math dialog" ,
on page 357).
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
10.6.4.2 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] > 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.
Compatibility between traces in mathematical relations
Mathematical traces are either constant functions or functions of one or more data or
memory traces. They are calculated on a point-to-point basis. Each trace point no. i of
the mathematical trace is calculated from a set of constant values c
1
, ..., c
n
plus the
trace points Trc1
i
, Trcm
i
of all traces 1 to m in the mathematical relation:
Math
i
= Fct. (c
1
, ..., c
n
, Trc1
i
, Trcm
i
), i = 1, no. of points
Different traces can be used in the same mathematical relation if they contain the
same number of points. The analyzer places no further restriction on the compatibility
of traces, e.g. the sweep points of the traces do not have to be the same.
The number of points belongs to the channel settings. Coupled data and memory
traces are always compatible because they have the same channel settings.
The analyzer processes only numeric values without units in the mathematical formu-
las. No consistency check for units is performed.
Trace softtool