Scan Mode and Trigger Signals

Ouput signals of synchronization board (musst or maestrio) are used to trigger detectors and counters. Often they are plugged into an opiom board for multiplexing. The signals generated by the synchronization board depend on the scanning mode held by parameter scan_mode and possibly gate_mode.

For musst board, signals used are OutA, OutB and Itrig for input triggers.

For maestrio board, the default signals used are OUT6, OUT7, OUT8. On maestrio board, these signals can be changed.

scan_mode = TIME or POSITION

For scanning mode TIME or POSITION, the synchro board is the scan master. First trigger is always a position. Next triggers can be generated by time or position depending on the scan_mode. A gate can be generated either by time or position depending on the gate_mode parameter. The generated signals are as follow as a function of a lima device being in accumulation mode or not:

FOR MUSST BOARD:

FOR MAESTRIO BOARD:

scan_mode = CAMERA

For scanning mode CAMERA, the camera first receives a trigger from the musst and subsequently the musst becomes the slave of the camera. It then registers beginning and end of frame of the detector acquisition. The camera output signal must be connected to the musst Itrig input signal. The musst can look at either signal EDGE (rising for start of exposure, falling for end of exposure) or signal LEVEL (high for exposure, low for end of exposure). This can be specified using common camera_signal parameter.

FOR MUSST BOARD:

FOR MAESTRIO BOARD: