Owner manual

6.7 Baseline calculation
746 VA Trace Analyzer / 747 VA Stand
6-17
6.7.4 Baselines for AC2 curves
With curves recorded with the measurement mode AC2MODE, only the following two
possibilities are available for calculation of the baseline:
• Type = AC2 rel., Scope = whole
In the evaluation of AC2 curves with the baseline type AC2 rel., the previ-
ously determined peak base points dU.front and dU.rear are connected
with each other to give the linear baseline. The two peak heights I
f
and I
r
are
then determined relative to the linear baseline and added to the result I.rel.
Instead of being determined
automatically, the two base
points dU.front and dU.rear
can also be entered manually
either by numeric entry or by
shifting using the cursor keys
(see "CURVES", section 5.5.3).
In contrast, the two slopes
S.front and S.rear have no
meaning here, a numeric entry
is ignored.
U / 2
I
f
I
r
AC2 rel.
I.rel =
I
f
+ I
r
dU.front dU.rear
• Type = AC2 abs./linear, Scope = whole
In the evaluation of AC2 curves with the baseline type AC2 abs. or linear,
while the previously determined peak base points dU.front and dU.rear
are shown and connected to give a linear baseline, this baseline is not
needed for the evaluation. The entire peak height I.abs is determined and
put out as the result.
The two base points dU.front and
dU.rear and the two slopes
S.front and S.rear have no
meaning here, a numeric entry is
ignored with these parameters.
I.abs
U / 2
AC2 abs.
dU.front dU.rear