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PEPU scope tools

In module fscan.pepuscope, some utility scans using PEPU board are available. Those scans was primarily written for test purpose at PEL laboratory. It allows to record on PEPU encoders and/or interferometer inputs (via V2SSI board) either in time or while a motor moves.

peputimescope

description:

pepuscope will record all configured inputs of a PEPU board at a given frequency.

usage:

peputimescan(frequency, duration, pepu=None, pepucalc=None, **kwargs):

parameters:

  • frequency : pepu acquisition rate (Hz)
  • duration : recorded time lapse in seconds
  • pepu [optionnal] : pepu bliss object. Taken from current measurment group otherwise.
  • pepucalc [optional] : pepu calc bliss object. Taken from current measurment group otherwise.
  • kwargs [optional] :
    • save [default= True] : save data in file or not
    • run [default= True] : when set, run the scan. If not set, return a bliss scan object to be run later.

pepumotorscope

description:

pepumotorscope will move a motor at a given speed and register all configured PEPU board inputs while the motor is moving. Motor motion will either be a standard move or a jog motion. The PEPU recording starts before motor movement is launched. There is no hardware synchronization.

usage:

pepumotorscan(motor, startpos, displacement, speed, frequency, extra_time=0.4, jog=False, pepu=None, pepucalc=None, **kwargs)

parameters:

  • motor : motor bliss object
  • startpos, displacement, speed : motor motion parameters
  • frequency : pepu acquisition rate (Hz)
  • extra_time [optionnal] : the total time of the acquisition is calculed using motor displacement estimation time. This extra_time can be added to this estimation.
  • jog [optionnal] : launch the movement using the jog command instead a standard move.
  • pepu [optionnal] : pepu bliss object. Taken from current measurment group otherwise.
  • pepucalc [optional] : pepu calc bliss object. Taken from current measurment group otherwise.
  • kwargs [optional] :
    • save [default= True] : save data in file or not
    • run [default= True] : when set, run the scan. If not set, return a bliss scan object to be run later.