Virtual Channels

For any acquisition source, it is possible to create new virtual channels that are based on the data of physical channels. They can be created by using add_virtual_channel method of acquisition source:

# define a function that will create a new channel:
def func(ch1, ch2):
    return ch1 / ch2 # ensure that shape is (N, 1) and not (N, )

# assume 'acq' is our acquisition source
acq.add_virtual_channel(virtual_channel_name="name_of_new_channel",
                        source_channels=["name_of_channel_1", "name_of_channel_2"],
                        function=func)

Note

Number of arguments of func has to be the same as number elements in source_channels.

The acquisition source will now contain a new channel named name_of_new_channel. It is equivalent to any physical channels and can be used in visualizations and is stored when measurement is saved. For more information see the documentation of add_virtual_channel method and Examples.