Sequoia / Tahoe Series User Manual California Instruments
268 M447352-01 REV-A
10. Tap the X Times selection button and enter 1 in the X Times field. This will cause the transient
program to repeat once and thus run two times in total. Do not confuse this global list-level
repeat capability with the list event-level repeat field mentioned in Step 5.
11. Tap the START field in the RUN menu of the TRANSIENTS screen. The transients list will be
executed two times. The power source will remain at the last programmed value of the list (zero
amps in this example).
8.2.2 Programming Slew Rates
As shown in the previous examples there are several ways that custom waveforms could be generated.
Programmable slew rates provide additional flexibility when customizing waveforms. Slew rates determine
how fast the current is changed by the controller when a step, pulse, or list transient is triggered. To use
programmable slew rates, the power supply must be programmed through the remote digital interface
using SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming
Manual M447353-01, refer to AMETEK PPD website, www.programmablepower.com, to download the
latest version.
8.2.3 Switching Waveforms in Transient Lists
The FUNCTION field available in each transient list event setup menu may be used to dynamically switch
waveforms during transient execution. This allows different waveforms to be used during transient
execution. Waveforms may be switched without the output of the source is turned off.
Figure 8-25 illustrates the concept of using different waveforms at different steps in a transient list. In this
case, the change was programmed to occur at the zero crossing. Any phase angle can be used to start a
transient step, however.
Figure 8-25: Switching Waveforms in a Transient List Transient Execution
A transient list can be executed from the RUN menu of the Transients screen; refer to Figure 8-18. Tapping
on the RUN selection field will open the RUN menu; refer to Figure 8-26. A selection could be made
whether to run the transient list repetitively (Continuous button) or multiple times (X Times button). To
start a transient list, tap on the START field. The list will begin to run, and a new selection-field will open,
ABORT. A long-duration transient could be stopped and aborted by tapping on the ABORT field while a
transient execution is in progress. For a short-duration transient, this will likely not be visible, as the
transient will complete before the screen is updated.
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