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simulate loading conditions with precise control of timing, duration, and slew. The following transient
modes can be generated:
Continuous Generates a repetitive pulse stream that toggles between two load levels.
Pulse Generates a load change that returns to its original state after some time period.
Toggled Generates a repetitive pulse stream that toggles between two load levels. Similar to
Continuous mode except that the transient points are controlled by explicit triggers
instead of an internal transient generator.
NOTE: Before turning on transient operation, set the desired mode of operation as well as all of the
parameters associated with transient operation. At *RST all transient functions are set to OFF.
Continuous Transients
In continuous operation, a repetitive pulse train switches between two load levels. The rate at which
the level changes is determined by the slew rate. In addition, use the following commands to program
continuous transients:
CURRent:TRANsient:MODE CONTinuous
CURRent:TRANsient:ALEVel 5
CURRent:TRANsient:AWIDth 0.4 mS
CURRent:TRANsient:BLEVel 10
CURRent:TRANsient:BWIDth 0.6 mS
TRANsient ON
TRIGger:IMMediate
This example assumes that the CC mode is active and the slew rate is at the default setting (maximum
rate). The electronic load module starts conduction at the main level (in this case 5 amps). When
transient operation is turned on, the module’s input current will slew to and remain at 10 amps for
60% of the period (600 us). The input current will then slew to and remain at 5 amps for the remaining
40% (400 us) of that cycle.
Pulse Transients
Pulsed transient operation generates a load change that returns to level B state after some time
period. It is similar to continuous operation with the following exceptions:
a. To get a pulse, an explicit trigger is required. To specify the trigger source, use
TRIGger:SOURce.
b. One pulse results from each trigger. Therefore, frequency cannot be programmed. Use the
following commands to program pulsed transients:
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