.. py:class:: MPFUtune(api, echo='Hahn', ps_length=16, d0=680, srt=6000000.0)


   Tuning MPFU channels for optimal attenuation and phase





   :Parameters:

       **api** : _type_
           The spectrometr API object

       **echo** : str, optional
           The echo type. Options = ['Hahn","Refocused"], by default "Hahn"

       **ps_length** : int, optional
           The length of the pi/2 pulse, by default 16

       **d0** : int, optional
           The approximate position of d0, this should be lower than ideal,
            by default 680














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   .. py:attribute:: api

      

   .. py:attribute:: hardware_wait
      :value: '5'

      

   .. py:attribute:: ps_length

      

   .. py:attribute:: d0

      

   .. py:attribute:: srt

      

   .. py:method:: _setup_echo(echo, tau1=400, tau2=400)


   .. py:method:: tune_phase(channel, target, tol=0.1, maxiter=30)

      
      Tunes the phase of a given channel to a given target using the
      standard scipy optimisation scripts. 


      :Parameters:

          **channel** : str
              The chosen MPFU channel. Options: ['+<x>', '-<x>', '+<y>', '-<y>']

          **target** : str
              The target echo position, this can either be maximising (+) or
              minimising (-) either the real (R) or imaginary (I) of the echo. 
              Options: ['R+', 'R-', 'I+', 'I-']

          **tol** : float, optional
              The tolerance in phase parameter, by default 0.1

          **maxiter** : int, optional
              The maximum number of iterations in the optimisation, by default 30



      :Returns:

          float
              The optimal value of the phase parameter











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   .. py:method:: tune_power(channel, tol=0.1, maxiter=30, bounds = [0, 100])

      
      Tunes the attenuator of a given channel to a given target using the
      standard scipy optimisation scripts. 


      :Parameters:

          **channel** : str
              The chosen MPFU channel. Options: ['+<x>', '-<x>', '+<y>', '-<y>']

          **tol** : float, optional
              The tolerance in attenuator parameter, by default 0.1

          **maxiter** : int, optional
              The maximum number of iterations in the optimisation, by default 30



      :Returns:

          float
              The optimal value of the attenuator parameter











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   .. py:method:: tune(channels, tol = 0.1, bounds=[0, 100])

      
      Tunes both the power and attenuation for a collection of channels.


      :Parameters:

          **channels** : dict
              A dictionary of MPFU channels to be tunned and the associated phase
              target.\
              Channel options = ['+<x>', '-<x>', '+<y>', '-<y>']\
              Phase target options = ['R+', 'R-', 'I+', 'I-']\
              E.g. {'+<x>': 'R+','-<x>': 'R-'}

          **tol** : float, optional
              The tolerance for all optimisations, by default 0.1














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   .. py:method:: calc_d0()