CoCo-80 User Manual
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Continuous after Trigger waits until a trigger event is detected. After the first
trigger event, averaging begins from zero and the system runs in Free Run mode.
Single Shot with Trigger waits until a trigger event is detected, then acquires
one block of data and stops. This mode is the best if you want to observe the time
signal block by block at a certain trigger event.
Single Shot without Trigger acquires one block every time the user presses
the Run button. This mode is best for observing a time signal block by block at
arbitrary times.
Auto-Arm Trigger acquires one block of data every time a trigger event is
detected. This block is added to the current average based on the average mode
settings under Analysis Parameters. If another trigger event is detected, a new
block of data will be acquired. This process will continue indefinitely with no user
interaction.
This mode can be used for time synchronous averaging with the average mode set
to Time Linear or Time Exponential.
Manual-Arm Trigger works like Auto-Arm trigger but prompts the user to
accept or reject each captured block. Only accepted blocks are added to the
average. This mode is the best for applications such as impact hammer testing
where you may not have confidence in the signal quality of some of the data
blocks.
Trigger Source
Trigger Source defines what signal is used to determine a trigger event. Any time
stream that is set as trigger source candidate in the CSA can be selected as trigger
source on the CoCo-80. If a signal is not identified as a trigger source candidate in
the CSA file then the signal will not appear on the list. This feature is designed to
simplify the user interface and optimize the CoCo-80 computational resources.
The candidates of Acquisition Mode selection and Trigger Source selection will be
defined by the CSA editor. The CSA editor will assign some the data streams after
the data conditioning as candidates of trigger sources. For example, in a CSA
there are 8 channels, if you only select ch1 and ch2 time streams as candidates of
trigger source and then this CSA will only show ch1 and ch2 on the trigger source
selection menu.
You may also define time streams other than native channels as trigger source
candidate. For example, if in the CSA an RMS measurement is derived from ch1,
this RMS time stream can be used as a trigger source.
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