AFX SERIES® OPERATION MANUAL
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2018 by Pacific Power Source, Inc. (PPS) • All Rights Reserved • No reproduction without written authorization from PPS.
AFX Series Power Source Operation Manual
Page 142 of 485
6.6.7
STEP or RAMP Modes
STEP and RAMP transients are very similar except in RAMP data entry mode, each step
duration is set to the minimum available time interval of 0.2 msec to obtain the smoothest
possible ramp result.
In STEP mode, the user sets each increment/decrement and step dwell time.
Step transients are useful for testing over or under voltage protection circuits on AC or DC
input supplies. They allow Voltage (AC or DC), Frequency and phase B or C to be steps at
discrete intervals and times. An example STEP transient is shown in the screen capture
below. It shows the relationship between the RAMP Parameters.
The LENGTH is the dwell time for each step level, including any ramp time. The first step
starts from the INITIAL VALUE. The DELTA is the increment or decrement value for each
step. The FINAL VALUE determines how many steps will be required to reach it.
Thus, the step COUNT will be:
COUNT = (FINAL VALUE – INITIAL VALUE) / DELTA
The total duration to complete the STEP transient depends on the repeat setting, length and
if the Insert Intial Value check box is ON or OFF:
If Insert Initial Value = ON (default):
DURATION = REPEAT TIMES * (COUNT + 1) * LENGTH
If Insert Initial Value = OFF:
DURATION = REPEAT TIMES * COUNT * LENGTH
Step Transients can be programmed from the front panel or the LXI webserver.
Summary of Contents for AFX Series
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