Model 4200A-SCS Parameter Analyzer Reference Manual
Section 5: Pulse measure and pulse generator units
4200A-901-01 Rev. C / February 2017
5-35
How LLEC adjusts pulse output to the target levels
LLEC is an algorithm that adjusts the output of a PMU channel. When enabled, the algorithm
performs a set number of iterations in an attempt to output the target voltage to the DUT.
The algorithm used for LLEC is shown in the next figure. The diagram shows that the PMU standard
pulse source (with measure) uses a burst-measure-analyze-reburst method. This method allows for
range changing, threshold comparison, load-line effect compensation, and pulse timing. This means
there is separation between each set, or burst, of pulses. The number of pulses output for each
attempt is controlled by the Number of Pulses setting for ITMs or the
13-109) function for UTMs. Note that LLEC is available only in the standard 2-level pulse mode. LLEC
is not available in the Segment Arb mode.
Figure 173: LLEC algorithm for two-level pulsing (PMU)
