8 - Manual setup
Source Control
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SMU4000 Series Instruction Manual
Source Control
CNFG >
[Source Measure Action] Manual Setup
>
[Source] Control and Limits
The control and limits menu contains options for source timing and control, limits, and
protection. Here the user will find options (depending on selected mode) for slew rate, high
reactance, current and voltage limits, dropout, OVP, OCP and OPP protection trips.
NOTE
Not all options and settings are available in each mode.
Slew Rate
The slew rate is the maximum rate at which the source output can change from one level to the
next.
It is important to note that this is a maximum setting and does not precisely define the rate of
change, as the source output transition rate can be affected by other factors including output
level, load level, voltage, and current and load reactance.
The slew rate setting can be utilised to tame fast edges and help prevent instability.
High reactance mode
When attempting to source into a highly reactive load which may be capacitive or inductive
there may be visible overshoot, ringing or even in some cases instability.
Enabling High Reactance mode helps to compensate for and reduce the risk of these issues.
With High Reactance Mode enabled the instrument uses a lower bandwidth with reduced
compensation speed and increased settling times to provide more robust performance with
higher capacitive and inductive loads.
NOTE
Enabling High Reactance mode can directly affect the instrument rise and settling times. Fastest
instrument performance can only be achieved when High Reactance mode is disabled. High
reactance mode can also lead to a noisier output and a slower response to changes in load due
to reduced compensation.