B&K Precision MDL Series - Programming Manual - Manual (Page 91)

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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:
CURRent:TRANsient:MODE PULSe
CURRent:TRANsient:ALEVel 5
CURRent:TRANsient:BLEVel 10
CURRent:TRANsient:BWIDth 10 mS
TRANsient ON
TRIGger:IMMediate
This example assumes that the CC mode is active, the slew rate is at the factory default setting
(maximum rate), and a trigger signal is connected to the mainframe's external trigger input. The
electronic load module starts conduction at the transient level A setting (5 amps). When the transient
mode is turned on and an external trigger signal is received (or TRIGger:IMMediate is received), the
input level starts increasing at a rate determined by the slew rate. When the value specified by the