Setting Up Start-Up/Coast-Down Measurements
dataPAC User’s Guide
147
Trigger Type
Press <SELECT> while in the Trigger Type box to select from a list of trigger types.
z
None indicates that the machine speed is not to be measured. This is only possible for
an FFT/Waterfall measurement.
z
Positive Slope indicates that the machine speed is measured using the positive edge of
the trigger signal as the phase reference.
z
Negative Slope indicates that the machine speed is measured using the negative edge of
the trigger signal as the phase reference.
z
Leading Edge or Trailing Edge automatically selects the rising edge or the falling
edge. The selection depends upon the trigger pulse width and polarity. If the trigger
input in a narrow positive pulse, Leading Edge selects the rising edge for the trigger
event, and Trailing Edge selects the falling edge. If the trigger input is a narrow
negative pulse, then leading edge selects the falling edge, and trailing selects the rising
edge. See the illustrations below.
Trigger Level
If the Trigger Type is set to something other than None, press <SELECT> to toggle between
Auto and TTL. Auto sets the trigger level based on the trigger input signal. TTL sets the
trigger level to a value of 1.4 volts.
Tach/Gear Box (Bode/Nyquist only)
Tach/Gear Box settings are not applicable for Waterfall/FFT measurements.
Time (S)
Time (S) settings are not applicable for Waterfall/FFT measurements.
The Measurement Parameters screen for Bode/Nyquist display looks like the following
diagram.
leading edge
trailing edge
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
