menlo¶

Classes¶

MenloCombBeatlockRFSource

Abstract class to represent an RF source. Typical examples of components inheriting this class

Module Contents¶

class menlo.MenloCombBeatlockRFSource(menlo_rpc_device, *args, **kwargs)¶

Bases: atomiq.components.electronics.rfsource.RFSource

Abstract class to represent an RF source. Typical examples of components inheriting this class could be a DDS, a standalone AOM driver, an AWG etc.

Parameters:

default_frequency -- Default frequency of the source.
default_amplitude -- Default amplitude of the source.
default_phase -- Default phase of the source.
freq_limit -- Tuple of the minimum and maximum allowed frequency.
amp_limit -- Tuple of the minimum and maximum allowed amplitude.
blind -- Whether the source is set to its default values in each prerun phase. If True, the source is unchanged during prerun, as for example necessary to generate a continuous laser lock signal. Defaults to False.
default_ramp_steps -- Number of constant value intervals a ramp is discretized into by default.
menlo_rpc_device (Component)

rfsource¶

_set_frequency(frequency)¶

Parameters:: frequency (artiq.language.TFloat)

_set_amplitude(amplitude)¶

Parameters:: amplitude (artiq.language.TFloat)

kernel_invariants¶

amplitude = 0.0¶

frequency = 100000000.0¶

phase = 0.0¶

default_ramp_steps = 30¶

blind = False¶

_prerun()¶: Specify here what should be done for this component before the run starts. In contrast to the _build() method, the _prerun() routine is executed on the core device before the actual experiment starts.

_prerun_blind()¶

set_frequency(frequency)¶

Parameters:: frequency (artiq.language.types.TFloat)

_check_frequency(frequency)¶

get_frequency()¶

Return type:: artiq.language.types.TFloat

set_amplitude(amplitude)¶

Parameters:: amplitude (artiq.language.types.TFloat)

_check_amplitude(amplitude)¶

Parameters:: amplitude (artiq.language.types.TFloat)

get_amplitude()¶

Return type:: artiq.language.types.TFloat

abstractmethod _set_phase(phase)¶

Parameters:: phase (artiq.language.types.TFloat)

set_phase(phase)¶

Parameters:: phase (artiq.language.types.TFloat)

get_phase()¶

Return type:: artiq.language.types.TFloat

set(frequency=float('nan'), amplitude=float('nan'), phase=0.0)¶

Set the frequency and amplitude of the DDS channel

Frequency/amplitude are set to the last known value if float("nan") is passed (default).

Parameters:

frequency (artiq.language.types.TFloat) -- Frequency in Hz (nan to use previous value)
amplitude (artiq.language.types.TFloat) -- Amplitude (nan to use previous value)
phase (artiq.language.types.TFloat) -- Phase in rad (default 0.0)

_ramp(duration, frequency_start, frequency_end, amplitude_start, amplitude_end, ramp_timestep=0.0002)¶

This method implements a stupid ramp on an abstract level. This will most likely work but be slow. If your hardware has native support for ramping, please override this function when you inherit from RFSource

Parameters:

duration (artiq.language.types.TFloat)
frequency_start (artiq.language.types.TFloat)
frequency_end (artiq.language.types.TFloat)
amplitude_start (artiq.language.types.TFloat)
amplitude_end (artiq.language.types.TFloat)
ramp_timestep (artiq.language.types.TFloat)

ramp(duration, frequency_start=float('nan'), frequency_end=float('nan'), amplitude_start=float('nan'), amplitude_end=float('nan'), ramp_timestep=float('nan'), ramp_steps=-1)¶

Ramp frequency and amplitude over a given duration. Parameters default to -1 or nan to indicate no change. If the start frequency/amplitude is set to nan, the ramp starts from the last frequency/amplitude which was set. This method advances the timeline by ´duration´

Parameters:

duration (artiq.language.types.TFloat) -- ramp duration [s]
frequency_start (artiq.language.types.TFloat) -- initial frequency [Hz]
frequency_end (artiq.language.types.TFloat) -- end frequency [Hz]
amplitude_start (artiq.language.types.TFloat) -- initial amplitude [0..1]
amplitude_end (artiq.language.types.TFloat) -- end amplitude [0..1]
ramp_timesteps -- time between steps in the ramp [s]
ramp_steps (artiq.language.types.TInt32) -- number of steps the whole ramp should have. This takes precedence over ramp_timesteps
ramp_timestep (artiq.language.types.TFloat)

_arb(duration, samples_amp, samples_freq, samples_phase, repetitions=1, prepare_only=False, run_prepared=False, transform_amp=identity_float, transform_freq=identity_float, transform_phase=identity_float)¶

Parameters:

duration (artiq.language.types.TFloat)
samples_amp (TList(TFloat))
samples_freq (TList(TFloat))
samples_phase (TList(TFloat))
repetitions (artiq.language.types.TInt32)
prepare_only (artiq.language.types.TBool)
run_prepared (artiq.language.types.TBool)

arb(duration, samples_amp=[], samples_freq=[], samples_phase=[], repetitions=1, prepare_only=False, run_prepared=False, transform_amp=identity_float, transform_freq=identity_float, transform_phase=identity_float)¶

Play Arbitrary Samples from a List

This method allows to set the output amplitude, frequency an phase according to the values specified in respective lists. The whole sequence is played in the specified duration. The pattern store in the sample list can also be repeated.

Tip

We supports a scheme to prepare the arb function before it is actually used. If that is needed, run this function with prepapre_only = True when the arb should be prepared and with run_prepared = True when the prepared arb should be played. In both calls the other parameters have to be passed.

Parameters:

samples_amp (TList(TFloat)) -- List of amplitude samples. If this list is empty (default), the amplitude is not modified.
samples_freq (TList(TFloat)) -- List of frequency samples. If this list is empty (default), the frequency is not modified.
samples_phase (TList(TFloat)) -- List of phase samples. If this list is empty (default), the phase is not modified.
duration (artiq.language.types.TFloat) -- The time in which the whole sequence of samples should be played back [s].
repetitions (artiq.language.types.TInt32) -- Number of times the sequence of all samples should be played. (default 1)
prepare_only (artiq.language.types.TBool) -- Only write the sequence to RAM, don't play it.
run_prepared (artiq.language.types.TBool) -- Play arb sequence previously prepared with prepare_only.
transform_amp -- Function to transform amplitude samples, must take a single argument of type TFloat and return a single TFloat.
transform_freq -- Function to transform frequency samples (see transform_amp).
transform_phase -- Function to transform phase samples (see transform_amp).

experiment¶

identifier¶

debug_output = False¶

core¶

_kernel_invariants¶

_prepare_done = False¶

_build_done = False¶

_hooks_done = []¶

_recursive_prepare()¶

_prepare()¶: Specify here what should be done for this component in the prepare phase

_recursive_build()¶

_build()¶: Specify here what should be done for this component in the build phase

_do_prerun()¶

required_components(ancestors=[])¶

children = []¶

__in_build = True¶

register_child(child)¶

call_child_method(method, *args, **kwargs)¶

Calls the named method for each child, if it exists for that child, in the order of registration.

Parameters:

method (str) -- Name of the method to call
args -- Tuple of positional arguments to pass to all children
kwargs -- Dict of keyword arguments to pass to all children

build()¶

Should be implemented by the user to request arguments.

Other initialization steps such as requesting devices may also be performed here.

There are two situations where the requested devices are replaced by DummyDevice() and arguments are set to their defaults (or None) instead: when the repository is scanned to build the list of available experiments and when the dataset browser artiq_browser is used to open or run the analysis stage of an experiment. Do not rely on being able to operate on devices or arguments in build().

Datasets are read-only in this method.

Leftover positional and keyword arguments from the constructor are forwarded to this method. This is intended for experiments that are only meant to be executed programmatically (not from the GUI).

get_argument(key, processor, group=None, tooltip=None)¶

Retrieves and returns the value of an argument.

This function should only be called from build.

Parameters:

key -- Name of the argument.
processor -- A description of how to process the argument, such as instances of BooleanValue and NumberValue.
group -- An optional string that defines what group the argument belongs to, for user interface purposes.
tooltip -- An optional string to describe the argument in more detail, applied as a tooltip to the argument name in the user interface.

setattr_argument(key, processor=None, group=None, tooltip=None)¶

Sets an argument as attribute. The names of the argument and of the attribute are the same.

The key is added to the instance's kernel invariants.

interactive(title='')¶

Request arguments from the user interactively.

This context manager returns a namespace object on which the method setattr_argument() should be called, with the usual semantics.

When the context manager terminates, the experiment is blocked and the user is presented with the requested argument widgets. After the user enters values, the experiment is resumed and the namespace contains the values of the arguments.

If the interactive arguments request is cancelled, raises CancelledArgsError.

get_device_db()¶: Returns the full contents of the device database.

get_device(key)¶: Creates and returns a device driver.

setattr_device(key)¶

Sets a device driver as attribute. The names of the device driver and of the attribute are the same.

The key is added to the instance's kernel invariants.

set_dataset(key, value, *, unit=None, scale=None, precision=None, broadcast=False, persist=False, archive=True)¶

Sets the contents and handling modes of a dataset.

Datasets must be scalars (bool, int, float or NumPy scalar) or NumPy arrays.

Parameters:

unit -- A string representing the unit of the value.
scale -- A numerical factor that is used to adjust the value of the dataset to match the scale or units of the experiment's reference frame when the value is displayed.
precision -- The maximum number of digits to print after the decimal point. Set precision=None to print as many digits as necessary to uniquely specify the value. Uses IEEE unbiased rounding.
broadcast -- the data is sent in real-time to the master, which dispatches it.
persist -- the master should store the data on-disk. Implies broadcast.
archive -- the data is saved into the local storage of the current run (archived as a HDF5 file).

mutate_dataset(key, index, value)¶

Mutate an existing dataset at the given index (e.g. set a value at a given position in a NumPy array)

If the dataset was created in broadcast mode, the modification is immediately transmitted.

If the index is a tuple of integers, it is interpreted as slice(*index). If the index is a tuple of tuples, each sub-tuple is interpreted as slice(*sub_tuple) (multi-dimensional slicing).

append_to_dataset(key, value)¶

Append a value to a dataset.

The target dataset must be a list (i.e. support append()), and must have previously been set from this experiment.

The broadcast/persist/archive mode of the given key remains unchanged from when the dataset was last set. Appended values are transmitted efficiently as incremental modifications in broadcast mode.

get_dataset(key, default=NoDefault, archive=True)¶

Returns the contents of a dataset.

The local storage is searched first, followed by the master storage (which contains the broadcasted datasets from all experiments) if the key was not found initially.

If the dataset does not exist, returns the default value. If no default is provided, raises KeyError.

By default, datasets obtained by this method are archived into the output HDF5 file of the experiment. If an archived dataset is requested more than one time or is modified, only the value at the time of the first call is archived. This may impact reproducibility of experiments.

Parameters:: archive -- Set to False to prevent archival together with the run's results. Default is True.

get_dataset_metadata(key, default=NoDefault)¶

Returns the metadata of a dataset.

Returns dictionary with items describing the dataset, including the units, scale and precision.

This function is used to get additional information for displaying the dataset.

See set_dataset() for documentation of metadata items.

setattr_dataset(key, default=NoDefault, archive=True)¶: Sets the contents of a dataset as attribute. The names of the dataset and of the attribute are the same.

set_default_scheduling(priority=None, pipeline_name=None, flush=None)¶

Sets the default scheduling options.

This function should only be called from build.

set_parameter(value, channel=None)¶

Parameters:

value (artiq.language.types.TFloat)
channel (artiq.language.types.TStr)