Ametek 10001i, User Manual, Page: 93 / 341

User Manual
i Series / iX Series 79
The square wave provides a high frequency content waveform with relative 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 sinewave 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 LEVEL field of
the WAVEFORMS menu. Changing the distortion level of the CLIP waveform forces the AC
source to rege
nerate the CLIPPED sinewave‟s datapoints 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, select a different waveform such as the
standard sinewave first, change the clip level and change the waveform back to the CLIPPED
sinewave. This will avoid any output interruption.
4.4.2 Phase Selection
Figure 4-29: Selecting waveforms for single phase or all phases
If the 9003iX or15003iX, different waveforms may be selected for each phase. The number of
custom waveforms from which to select remains 50 but each phase can be assigned a different
custom or standard waveform. The specific output phase for which the waveshape is
programmed is selected with the PHASE key on the front panel. The selected phase is always
shown in the top right hand corner of the WAVEFORMS display.
To select the same wave shape for all three phases in a three phase configuration, press the
PHASE key until the øABC annunciator appears in the top right corner of the WAVEFORMS
menu. Waveform selections made in this mode will apply to all three phases.
4.4.3 Creating Custom Waveforms
The iX Series provides four groups of 50 custom defined waveforms each for a total of 200
waveforms in addition to the 3 standard waveforms. Of these four groups, one may be active at a
time. The active group is selected in the INITIAL SETUP menu.
Custom waveforms cannot be created from the front panel of the iX Series. Rather, they have to
be downloaded through the IEEE-488 or RS232C interface. A Windows based program is
included with the iX Series that allows waveforms to be created and downloaded easily. This
Graphical User Interface program allows waveforms to be created by specifying harmonic
amplitudes and phase angles with respect to the fundamental. It also offers an arbitrary
waveform data entry mode that allows individual data points to be specified.