qcodespp.instrument_drivers.QDevil.QDAC2_Array

Classes

Module Contents

class qcodespp.instrument_drivers.QDevil.QDAC2_Array.Array_Arrangement_Context(qdacs: QDac2_Array, contacts: Dict[str, Dict[str, int]], output_triggers: Dict[str, Dict[str, int]] | None = None, internal_triggers: Sequence[str] | None = None)

__enter__()

__exit__(exc_type, exc_val, exc_tb)

property contact_names: Sequence[str]

Returns:: Sequence[str]: Channel names

channel(contact: str) → qcodespp.instrument_drivers.QDevil.QDAC2.QDac2Channel

Args:: contact (str): Name
Returns:: QDac2Channel: Instrument channel

qdac_names() → Sequence[str]

virtual_voltage(contact: str) → float

Args:: contact (str): Name of contact
Returns:: float: Voltage before correction

set_virtual_voltages(contacts_to_voltages: Dict[str, float]) → None

currents_A(nplc: int = 1, current_range: str = 'low') → Sequence[float]

Measure currents on all contacts

The order is that of contacts()

Args:: nplc (int, optional): Number of powerline cycles to average over current_range (str, optional): Current range (default low)

leakage(modulation_V: float, nplc: int = 2) → numpy.ndarray

Run a simple leakage test between the contacts

Each contact is changed in turn and the resulting change in current from steady-state is recorded. The resulting resistance matrix is calculated as modulation_voltage divided by current_change.

Args:: modulation_V (float): Virtual voltage added to each contact nplc (int, Optional): Powerline cycles to wait for each measurement
Returns:: ndarray: contact-to-contact resistance in Ohms

class qcodespp.instrument_drivers.QDevil.QDAC2_Array.QDac2_Array(controller: qcodespp.instrument_drivers.QDevil.QDAC2.QDac2, listeners: Sequence[qcodespp.instrument_drivers.QDevil.QDAC2.QDac2])

A collection of interconnected QDAC-IIs

The instruments are required to be connected as described in section 5.5 ‘Synchronization of multiple QDAC-II units’ in the manual. The sync cables must be left in place after sync, so that the clock is continuously distributed, and the Controller can trigger all Listerners by sending pulses from Ext Out 4 to all Ext In 3 simultaneously.

property trigger_out: int

property common_trigger_in: qcodespp.instrument_drivers.QDevil.QDAC2.ExternalInput

property controller: str

Returns:: str: Name of Controller

property names: FrozenSet[str]

Returns:: FrozenSet[str]: Names of all QDAC-IIs in the array

allocate_trigger() → qcodespp.instrument_drivers.QDevil.QDAC2.QDac2Trigger_Context

Allocate internal trigger on the Controller

Returns:: QDac2Trigger_Context: context manager

connect_external_trigger(port: int, trigger: qcodespp.instrument_drivers.QDevil.QDAC2.QDac2Trigger_Context, width_s: float = 1e-06) → None

Route internal trigger to external trigger

Args:: port (int): External output trigger number trigger (QDac2Trigger_Context): Internal trigger width_s (float, optional): Output trigger width in seconds (default 1ms)

trigger(internal_trigger: qcodespp.instrument_drivers.QDevil.QDAC2.QDac2Trigger_Context)

Fire an internal trigger on the Controller

Args:: QDac2Trigger_Context: internal trigger

sync() → None

Synchronizes the array of QDAC-IIs

The Listeners will stop using their own clock and start using the Controller’s clock.

arrange(contacts: Dict[str, Dict[str, int]], output_triggers: Dict[str, Dict[str, int]] | None = None, internal_triggers: Sequence[str] | None = None) → Array_Arrangement_Context

An arrangement of contacts across several QDAC-II instruments

The arrangement is a collection of QDac2.arrangement, one for each instrument but with a dedicated controller.

See QDac2.arrangement() for further documentation. Note that an array arrangement does not (yet) support corrections between contacts (which the indiviual arrangements on each instrument does).

Args:: contacts (Dict[str,Dict[str, int]]): Instrument name to contact-name/channel pairs output_triggers (Dict[str,Dict[str, int]], optional): Instrument name to name/output-trigger pairs internal_triggers (Sequence[str], optional): List of names of internal triggers to allocate on the controller
Returns:: Array_Arrangement_Context: context manager