Acquisition details

This page describes important Qblox-specific behaviour of the TriggerCount, Timetag, TimetagTrace and Trace acquisition protocols. Explanations of the protocols themselves can be found in Acquisition protocols and detailed usage examples can be found in the Tutorial: Acquisitions tutorials.

Duration

On all Qblox modules, the actual duration of the trigger count, timetag and timetag-trace acquisitions is 4 ns shorter than the duration specified upon creating the operation. For example, a TriggerCount(port="q0:res", clock="q0.ro", duration=1e-6) will acquire data for 996 ns, but the operation will occupy 1 µs of schedule time. The start time of the actual acquisition is the same as the start time of the operation.

Bin modes and module support

Not all acquisitions work with all bin modes or module types. The table below lists exactly what is supported for the TriggerCount, Timetag, TimetagTrace and Trace acquisitions.

For more information about the bin modes, please see the tutorials and reference guide.

Protocol	Support modules	Supported bin modes
TriggerCount	QRM	BinMode.APPEND, BinMode.AVERAGE
	QTM	BinMode.APPEND
Timetag	QTM	BinMode.APPEND, BinMode.AVERAGE
TimetagTrace	QTM	BinMode.APPEND
Trace	QRM, QRM-RF	BinMode.AVERAGE
	QTM	BinMode.FIRST