2.5 Peak Detection (PKD)
U5303A User's Manual
35
Baseline stabilization and digital offset
For applications where extraordinary baseline stability is required, this option provides a stabilization
algorithm with a resolution of 0.0625 LSB. In combination with the baseline stabilization, a digital
offset with a resolution of 0.5 LSB can be applied.
This algorithm is specially implemented for applications where most of the acquired data is nearby a
baseline and the data of interest are fast peaks above/below this baseline. Two programmable
thresholds should be configured to define the baseline margins and avoid non desired signal data in the
computation, as illustrated below.
In addition, a digital offset can be applied after the baseline stabilization.
Figure 2.10 -
Continuous baseline stabilization example
There are two mode for baseline correction calculation (see Figure below):
a) Continuous: the baseline correction computation is active all the time .
b) Between acquisitions: the baseline calculation is active only outside the acquisition window (i.e.
from the trigger to the end of the record, defined by acquisition size). In addition to threshold options,
this mode is a way to exclude unwanted signal values from the baseline calculation, assuming that
there is no or very low active signal outside the acquisition window.
