Figure 2-6 shows the waveform that would result for this toggled transient operation example. Operation is similar to that described for continuous and pulse operation, except that each time a trigger is received the input alternates between the main and transient current levels.
Figure 2-6. Toggled Transient Operation
Triggered Operation
The Electronic Load has various triggering modes to allow synchronization with other test equipment or events. As described previously, triggering can be used for the following applications:
Triggering a preset level | Transfers all pending preset levels to the actual level. For the presently active mode, the |
| new level appears at the input. For the modes which are not presently active, the preset |
| levels will not take effect at the input until the applicable mode becomes active. |
Triggering a transient pulse | Generates a transient pulse of programmable width when pulsed transient operation is in |
| effect. |
Toggling | Changes the input between the main level and the transient level when toggled transient |
| operation is in effect. |
Three triggering methods are available over the GPIB: the GET function, the *TRG common HPSL command, and the TRIG subsystem HPSL command (refer to Programming Reference Guide). The HPSL TRIG subsystem allows you to select the TRIG command as the trigger source. There is also a TRIGGER connector on the rear panel for external trigger inputs. Triggering cannot be done via the front panel.
*TRG and the TRIG command are both synchronous with other commands; that is, the load is not triggered until pending operations are completed. GET and external triggers are all asynchronous; that is, the loads are triggered as soon as the trigger signal is received.
The
The Electronic Load has a status reporting capability to keep track of trigger operations. Refer to ’Status Reporting’ in the Agilent Electronic Loads Programming Reference Guide.
Slew Rate And Minimum Transition Time
Slew rate is defined as the change in current or voltage over time. A programmable slew rate allows a controlled transition from one load setting to another to minimize induced voltage drops on inductive power wiring, or to control induced transients on a test device (such as would occur during power supply transient response testing).
