Waveform Management; Figure 4-7: Selecting A Waveform - Ametek CS Series User Manual

User Manual – Rev J
4.3.4 Change Compliance Voltage Range
The change between the 135 or 270 Volt compliance range, use the SET key to select the setuo
screen and scroll to the VRANGE field. If the CS you are using has dual ranges, you can toggle
the compliance voltage range by using the shuttle to toggle back and forth or enter the relevant
value (135 or 270) using the keypad followed by the ENTER key. Not the the 270 range provides
only half the current of the 135 range but will support twice the compliance voltage.
4.4

Waveform Management

The CS Series employs independent arbitrary waveform generators for each phase. This allows
the user to create custom waveforms. In addition, three standard waveforms are always
available. This chapter covers issues that relate to defining, downloading and managing custom
waveforms.
4.4.1 Standard Waveforms
For most AC applications, a sine wave shape is used. The sine wave is one of the standard
waveforms provided on all CS Series models. This standard sine wave is always available and
is the default waveform at power-on. Two more standard waveforms are available, square and
clipped.
The square wave provides a high frequency content waveform with relatively fast rise and fall
times. Due to AC amplifier bandwidth limitations, the frequency content of the standard square
wave has been kept within the amplifier's capabilities. As the fundamental frequency is
increased, the relative contribution of higher harmonics is reduced.
The clipped sine wave may be used to simulate voltage distortion levels to the unit under test.
The total harmonic distortion level may be programmed in percent using the CLIP LEV field
directly below the FUNC entry.
Note that changing the distortion level of the clipped waveform forces the AC source to
regenerate the clipped sine wave's data points and reload the waveform register with the newly
requested data. This process requires the output to be dropped briefly. To avoid interrupting the
voltage output to the unit under test, set the clip level needed before closing the output relay and
do not change it while the EUT is under power. You can then toggle between the clipped sine
wave and any other waveform in memory without interrupting the output.
4.4.2 Phase Selection
California Instruments

Figure 4-7: Selecting a Waveform

CS Series
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