Rohde & Schwarz R&S ZNA Series - Page 476

GUI reference
R&S
®
ZNA
476User Manual 1178.6462.02 ─ 29
Instead of the trace itself, the linearity deviation view displays the deviation of the trace
values from a linear function of the current sweep variable sv:
LinDev_Tr(sv) = Tr(sv) – (Constant + Slope · sv)
"Constant" and "Slope" can either be specified or obtained from a linear regression of
the original trace. The latter makes sense if you want to verify linearity but currently do
not care if the trace values are close to a particular target line.
"Linearity Deviation" is only available for cartesian trace formats.
On
Activates/deactivates the linearity deviation calculation using the current Constant and
Slope values. When activated, the trace statistics info field is shown and populated
with the following (additional) lines:
●
Lin Deviation On
●
Slope <value><Y-scale unit (per X scale unit)>
●
Constant <value> <Y-scale unit>
Note that if both Slope and Constant are zero (default), the linearity deviation view sim-
ply reproduces the original trace.
Remote command:
CALCulate<Chn>:LDEViation:MODE
Auto Linearity Deviation
Turns linearity deviation calculation On and (re)calculates Constant and Slope using
linear regression.
Remote command:
CALCulate<Chn>:LDEViation:AUTO ONCE
Tracking
Similar to Auto Linearity Deviation but recalculates Constant and Slope for every
sweep.
Traces softtool