Ametek CSW5550 User Manual page 58

User Manual
SCALE
TRIG MODE
TRIG SOURCE
TRIG PHASE / SET VOLT
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This mode does not apply to the TRACE view display mode
and is ignored when this mode is selected.
Sets the horizontal time axis for the TRACE view display mode.
The fields range is 4 ms to 42 ms in single-phase mode or 12
ms to 128 ms in three phase mode.
This parameter is ignored when the TABLE or BAR view
display mode is selected.
This field sets the trigger mode for the acquisition. Available
options are SINGLE (single shot acquisition) or CONT
(continuous acquisition). In SINGLE shot mode, the acquisition
is triggered once each time the START field is selected and the
ENTER key is pressed. The selected trigger source is used to
determine the trigger point. Once the acquisition has been
triggered, the data are displayed and do not change until the
next acquisition is triggered. This mode is most appropriate for
single shot events such as start up currents.
In the CONT mode, acquisitions occur repeatedly and the data
is updated on screen after each trigger occurs. This provides a
continuous update of the data and is most appropriate for
repetitive signals.
The trigger source selects the event that will trigger a
measurement acquisition. Available options for this field are
IMM (immediate), PHASE A or SET VOLT. The IMM trigger
source causes the acquisition to trigger immediately when the
ENTER key is pressed on the START field. Essentially, this is
an asynchronous trigger event. The acquisition will always be
triggered in this mode and data is available immediately.
The PHASE A source will cause the acquisition to trigger on the
occurrence of a set phase angle for the voltage on phase A.
The trigger source is always phase A when in this mode,
regardless of the phase selection shown in the top right corner
of the display. When the acquisition is started, the acquisition
system waits for the specified phase angle to occur before
triggering the acquisition. This mode allows exact positioning of
the acquisition data window with respect to the voltage
waveform.
The SET VOLT mode causes the acquisition to trigger at the
specified voltage. This mode also programs the selected phase
or all three phases when the measurement is started from the
START field. As such, this trigger source selection also
programs the output voltage to the selected rms level.
This field changes purpose, depending on the trigger source
selected immediately above it. If the trigger source equals IMM
or PHASE A, this field can be used to program the trigger
phase angle (TRIG PHASE). In IMM mode, the value of this
field is ignored.
If the trigger source is set to SET VOLT, this field can be used
to specify the rms voltage to program the output to and trigger
the measurement on. The voltage value set here should not
exceed the maximum voltage range selected or the rms
California Instruments
CSW Series