User Manual – Rev BE    AMETEK Programmable Power 
MX Series  134 
The selected phase is shown in the top right corner of the display (øA, øB or 
øC). The selected wave shape will be applied to that phase. If all phases are 
selected (phase coupling), the selected waveform will apply to all three phases. 
If single phase is selected on a 45MX-3Pi model, the phase coupling is always 
set to phase A, so pressing the PHASE button has no effect. 
The following fields are available in the WAVEFORMS menu: 
CLIP LEVEL  This parameter determines the amount of total 
harmonic distortion of the built-in CLIPPED sine wave 
waveform. The range is 0 % through 20 % THD. 
  Note that changing the distortion level of the CLIPPED 
sine wave while the CLIPPED sine wave is used on the 
output of one or more phases, forces the output of the 
AC Source to be dropped momentarily. To avoid this, 
make sure none of the phases is using the CLIPPED 
sine wave function when changing the clip level. 
GROUP  The group field displays the currently selected 
waveform group. There are four groups of 50 user-
defined waveforms each for a total of 200 waveforms. 
Only one group can be active at a time however. This 
field only displays the selected waveform group. It 
cannot be used to change the actual group selected. 
Group selection must occur at power up and is done 
from the INITIAL SETUP 3 screen. See section 4.2.11.3 
for details. 
MODE  The mode field determines the operation mode of the 
WAVEFORMS display screen. Available options for this 
field are: 
  PROG:  This mode is used to change the programmed 
wave shape function on the selected phase. This is also 
the default mode of operation. 
  VIEW (T):  This mode can be used to display any of the 
available user defined waveforms in a time domain 
display. Previewing a waveform can be useful if you are 
unsure about the nature of the waveform that was 
stored.