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#
# This file is part of the PyMeasure package.
#
# Copyright (c) 2013-2024 PyMeasure Developers
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
from math import sqrt, log10
from pymeasure.instruments import Instrument, Channel, SCPIUnknownMixin
from pymeasure.instruments.validators import strict_range, strict_discrete_set
class AFG3152CChannel(Channel):
SHAPES = {
"sinusoidal": "SIN",
"square": "SQU",
"pulse": "PULS",
"ramp": "RAMP",
"prnoise": "PRN",
"dc": "DC",
"sinc": "SINC",
"gaussian": "GAUS",
"lorentz": "LOR",
"erise": "ERIS",
"edecay": "EDEC",
"haversine": "HAV",
}
FREQ_LIMIT = [1e-6, 150e6] # Frequency limit for sinusoidal function
DUTY_LIMIT = [0.001, 99.999]
AMPLITUDE_LIMIT = {
"VPP": [20e-3, 10],
"VRMS": list(map(lambda x: round(x / 2 / sqrt(2), 3), [20e-3, 10])),
"DBM": list(
map(lambda x: round(20 * log10(x / 2 / sqrt(0.1)), 2), [20e-3, 10])
),
} # Vpp, Vrms and dBm limits
UNIT_LIMIT = ["VPP", "VRMS", "DBM"]
IMP_LIMIT = [1, 1e4]
shape = Instrument.control(
"function:shape?",
"function:shape %s",
""" Control the shape of the output. (str)""",
validator=strict_discrete_set,
values=SHAPES,
map_values=True,
)
unit = Instrument.control(
"voltage:unit?",
"voltage:unit %s",
""" Control the amplitude unit. (str)""",
validator=strict_discrete_set,
values=UNIT_LIMIT,
)
amp_vpp = Instrument.control(
"voltage:amplitude?",
"voltage:amplitude %eVPP",
"""Control the output amplitude in Vpp. (float)""",
validator=strict_range,
values=AMPLITUDE_LIMIT["VPP"],
)
amp_dbm = Instrument.control(
"voltage:amplitude?",
"voltage:amplitude %eDBM",
""" Control the output amplitude in dBm. (float)""",
validator=strict_range,
values=AMPLITUDE_LIMIT["DBM"],
)
amp_vrms = Instrument.control(
"voltage:amplitude?",
"voltage:amplitude %eVRMS",
""" Control the output amplitude in Vrms. (float)""",
validator=strict_range,
values=AMPLITUDE_LIMIT["VRMS"],
)
offset = Instrument.control(
"voltage:offset?",
"voltage:offset %e",
""" Control the amplitude offset. It is always in Volt. (float)""",
)
frequency = Instrument.control(
"frequency:fixed?",
"frequency:fixed %e",
""" Control the frequency. (float)""",
validator=strict_range,
values=FREQ_LIMIT,
)
duty = Instrument.control(
"pulse:dcycle?",
"pulse:dcycle %.3f",
""" Control the duty cycle of pulse. (float))""",
validator=strict_range,
values=DUTY_LIMIT,
)
impedance = Instrument.control(
"output:impedance?",
"output:impedance %d",
""" Control the output impedance of the channel. Be careful with this.""",
validator=strict_range,
values=IMP_LIMIT,
cast=int,
)
def insert_id(self, command):
"""Prepend the channel id for most writes."""
return f'source{self.id}:{command}'
def enable(self):
self.parent.write("output%d:state on" % self.number)
def disable(self):
self.parent.write("output%d:state off" % self.number)
def waveform(
self, shape="SIN", frequency=1e6, units="VPP", amplitude=1, offset=0
):
"""General setting method for a complete wavefunction"""
self.write("function:shape %s" % shape)
self.write("frequency:fixed %e" % frequency)
self.write("voltage:unit %s" % units)
self.write("voltage:amplitude %e%s" % (amplitude, units))
self.write("voltage:offset %eV" % offset)
class AFG3152C(SCPIUnknownMixin, Instrument):
"""Represents the Tektronix AFG 3000 series (one or two channels)
arbitrary function generator and provides a high-level for
interacting with the instrument.
.. code-block:: python
afg=AFG3152C("GPIB::1") # AFG on GPIB 1
afg.reset() # Reset to default
afg.ch1.shape='sinusoidal' # Sinusoidal shape
afg.ch1.unit='VPP' # Sets CH1 unit to VPP
afg.ch1.amp_vpp=1 # Sets the CH1 level to 1 VPP
afg.ch1.frequency=1e3 # Sets the CH1 frequency to 1KHz
afg.ch1.enable() # Enables the output from CH1
"""
def __init__(self, adapter, name="Tektronix AFG3152C arbitrary function generator", **kwargs):
super().__init__(
adapter,
name,
**kwargs
)
self.ch1 = AFG3152CChannel(self, 1)
self.ch2 = AFG3152CChannel(self, 2)
def beep(self):
self.write("system:beep")
def opc(self):
return int(self.ask("*OPC?"))
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