from typing import Any, Optional
from qcodes.instrument import Instrument
from qcodes.parameters import DelegateParameter, Parameter
from qcodes.validators import Enum, Numbers
[docs]
class BaselSP983(Instrument):
"""
A virtual driver for the Basel SP 983 current to voltage converter.
This driver supports both the SP 983 and SP 983c models. These differ only
in their handling of input offset voltage. It is the responsibility of the
user to capture the input offset, (from the voltage supply) and compensate
that as needed for SP 983. For SP 983c model, 'input_offset_voltage'
argument can be used to set up offset (This doesn't work for SP 983c01
model).
Note that, as this is a purely virtual driver, there is no support
for the remote control interface (SP 983a). It is the responsibility of
the user to ensure that values set here are in accordance with the values
set on the instrument.
Args:
name
input_offset_voltage: (Optional) A source input offset voltage
parameter. The range for input is -10 to 10 Volts and it is
user's responsibility to ensure this. This source parameter is
used to set offset voltage parameter of the preamp and the
source parameter should represent a voltage source that is
connected to the "Offset Input Voltage" connector of the SP983C.
"""
def __init__(
self, name: str, input_offset_voltage: Optional[Parameter] = None, **kwargs: Any
):
super().__init__(name, **kwargs)
self.add_parameter(
"gain",
initial_value=1e8,
label="Gain",
unit="V/A",
get_cmd=None,
set_cmd=None,
vals=Enum(1e09, 1e08, 1e07, 1e06, 1e05),
)
self.add_parameter(
"fcut",
initial_value=1e3,
label="Cutoff frequency",
unit="Hz",
get_cmd=None,
set_cmd=None,
vals=Enum(30.0, 100.0, 300.0, 1e3, 3e3, 10e3, 30e3, 100e3, 1e6),
)
self.add_parameter(
"offset_voltage",
label="Offset Voltage",
unit="V",
vals=Numbers(-0.1, 0.1),
scale=100,
source=input_offset_voltage,
parameter_class=DelegateParameter,
)
[docs]
def get_idn(self) -> dict[str, Optional[str]]:
vendor = "Physics Basel"
model = "SP 983"
serial = None
firmware = None
return {
"vendor": vendor,
"model": model,
"serial": serial,
"firmware": firmware,
}