R&S ZVB - Page 178

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 163
 Data & Trace Funct. -> New Mem stores the current state of all data traces modified by the trace
functions to new memory traces, leaving the existing memory traces unchanged.
Trace functions
The trace functions comprise the following mathematical operations:
 Any mathematical relation applied to the trace (Math = Data/Mem, Math = User Def).
 A shift of the trace in horizontal or vertical direction (Shift Response Value, Shift Stimulus Value).
Data —> Mem and Data —> New Mem store the raw trace without the trace functions, Data & Trace
Funct —> Mem and Data & Trace Funct —> New Mem store the trace after it has been transformed using
the trace functions.
Remote control:
TRACe:COPY <memory_trc>,<data_trc>
TRACe:COPY:MATH <memory_trace>, <data_trace>
Math = User Def
Activates the mathematical mode and displays the mathematical trace defined via User Def. Math. The
mathematical trace replaces the active data trace in the diagram area; it is updated as the measurement
goes on and the analyzer provides new active trace data.
This function is disabled unless a user-defined mathematical trace is available.
Math = User Def and Math = Data/Mem are alternative options of the mathematical mode. Selecting
one option disables the other. The mathematical expression defined via Define Math is not affected.
Remote control:
CALCulate<Chn>:MATH[:EXPRession]:SDEFine <string>
CALCulate<Chn>:MATH:STATe ON
User Def. Math...
Opens a dialog to define a mathematical relation between traces and calculate a new mathematical trace.
Each measurement point of the active trace is replaced by the corresponding point of the mathematical
trace.
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 provided that 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.