Triggers
A trigger is used in rapid measurements to signal that measurement must start.
There are several types of trigger:
.
Manual – measurement begins when the user presses the Measurement
Manager’s Start button.
.
Transmission drops to level – measurement begins when transmission
drops to a specified level.
.
Scattering increases to level on detector – measurement begins when a
specified scattering level is reached on the specified detector.
.
External trigger – measurement begins when an external TTL signal is
received from another device.
Event number and duration
A trigger can be set up which requires an event to occur multiple times, each
event lasting for a specified duration. In the example below a Transmission
drops to level trigger starts measurement when transmission has fallen to 70%
four times, with the measurement period after each of these events lasting for at
least 400ms.
CHAPTER 10
Spraytec Page 10.5
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