PET-AR400 User Manual
V1.0.0
P.7
A/D Trigger Mode
1. Software trigger mode
After the acquisition parameters are configured by the PC and the trigger command is send,
the A/D starts to acquire data.
2. Analog threshold trigger mode
After the acquisition parameters are configured by the PC and the start command is send, the
A/D waits for the input voltage signal to meet the trigger condition, after the signal reach the
condition, it starts to collect data
The analog threshold trigger can be used to detect the instantaneous change in a continuous
voltage signal.
The user can specify the trigger condition and range.
1.
Above High
：
A/D starts to acquire data, once the signal is higher than the high level.
2.
Below Low
：
A/D starts to acquire data, once the signal is lower than the high level.
