AMETEK CSW Series - Manual (Page 102)

User Manual California Instruments
102 CSW Series
3.16 Transient Programming
3.16.1 Introduction
Transient programming provides a precise timing control over output voltage and frequency
changes. This mode of operation can be used to test a product for susceptibility to common AC
line conditions such as surges, sags, brownouts and spikes. By combining transient
programming with custom waveforms virtually any AC condition can be simulated on the output
of the AC source.
The default voltage mode is FIXED which means the output voltage is constant and remains at
the level set by the user. Changes made to the output voltage made from the PROGRAM 1
menu take effect immediately. In front panel operation mode, the voltage and frequency slew
rates (rate of change) are always at their maximum of 9.9E37 V/s and 9.9E37 Hz/s or MAX.
Slew rate programming is only possible over the IEEE-488 or RS232C bus. On power up, the
AC source always reverts to the maximum slew rate for both voltage and frequency.
3.16.2 Using Transient Modes
The voltage can be programmed in the following transient operating modes:
STEP causes the output to permanently change to its triggered value.
PULSE causes the output to change to its triggered value for a specific time, as
determined by the Pulse menu parameters.
LIST causes the output to sequence through a number of values, as determined by
points entered in the List menu.
FCSWED disables transient operation for the selected function.
3.16.3 Step Transients
Step transients let you specify an alternate or triggered voltage level that the AC source will
apply to the output when it receives a trigger. Because the default transient voltage level is zero
volts, you must first enter a triggered voltage before you can trigger the AC source to change the
output amplitude. Step transients can only be programmed through the bus, not the front panel.
Refer to the SCPI Programming Manual for more information about programming Step
transients and triggers.
3.16.4 Pulse Transients
Pulse transients let you program the output to a specified value for a predetermined amount of
time. At the end of the Pulse transient, the output voltage returns to its previous value.
Parameters required to set up a Pulse transient include the pulse count, pulse period, and pulse
duty cycle. An example of a Pulse transient is shown in Figure 3-45. In this case, the count is 4,
the pulse period is 16.6 ms or 60 Hz and the duty cycle is 33%.
Figure 3-45: Pulse Transients