|NI-SCOPE (English | Japanese)|
SMC-Based digitizers (NI 5105/5114/5122/5124/5142/5152/5153/5154/5160/5162/5622/5922) support multirecord acquisitions, which allow the capture of multiple triggered waveforms without software intervention. In this mode, the digitizer automatically begins storing a new record to onboard memory a short time after finishing the previous record. The number of records and record size are both configurable.
The following timing diagram illustrates how SMC-based digitizers react to the user-configurable input triggers during a multirecord acquisition.
Each state prefixed by Wait for is a state in which an input trigger can be configured. This trigger tells the digitizer when to transition out of that particular state. The hardware is only sensitive to a particular trigger when in that trigger's appropriate Wait for state. For example, the hardware is not sensitive to a high level on the Advance Trigger until it enters the Wait for the Advance trigger state.
|Note The trigger signals in the timing diagram assume active high level triggers.|
The exportable events are also shown in the timing diagram. The End of Record Event is generated once per record when the digitizer has acquired all of its pre- and post-Reference Trigger samples. This signal can be used for handshaking between devices in a system. The Done Event asserts when all of the records have been completed, but it does not assert if the acquisition is aborted or times out.