User`s guide

Chapter 2 Front Panel Operations RIGOL
M300 User’s Guide
2-11
To use the alarm trigger mode, configure the alarm by referring to “Alarm
Configuration” and select alarm trigger mode, then select an alarm channel. The
instrument executes a scan when an alarm is generated in the specified alarm
channel.
In alarm trigger mode, if the number of scans is set to “Infinite”, after you press
Run/Stop at the front panel, the instrument enters the wait-for-trigger state. Then
the instrument executes a scan when an alarm is generated in the specified alarm
channel. Press and hold Run/Stop and the instrument will exit the wait-for-trigger
state.
If the number of scans is a specific value, after you press Run/Stop at the front
panel, the instrument enters the wait-for-trigger state. Then the instrument executes
a scan when an alarm is generated in the specified alarm channel. After executing
the specified number of alarm triggers, the instrument exits the wait-for-trigger
state.
During the scan, the instrument stores the measurement data, scaling data and
alarm data in the non-volatile memory automatically.
Explanation:
The instrument triggers a scan when the trigger condition is met and scans the
channels in the scan list in ascending order (from slot 1 to slot 5) automatically.
Operations on any channels of the module of which the channel is in the scan list
are forbidden. You can press and hold Run/Stop at the front panel to stop the
scan but after the scan has stopped, it cannot be resumed. When a new scan is
executed, all the readings in the memory will be cleared.