Source code for qcodes.instrument_drivers.tektronix.DPO7200xx

QCoDeS driver for the MSO/DPO5000/B, DPO7000/C,
DPO70000/B/C/D/DX/SX, DSA70000/B/C/D, and
MSO70000/C/DX Series Digital Oscilloscopes
import textwrap
import time
from functools import partial
from typing import Any, Callable, Union, cast

import numpy as np

from qcodes.instrument import ChannelList, Instrument, InstrumentChannel, VisaInstrument
from qcodes.parameters import (
from qcodes.validators import Arrays, Enum

def strip_quotes(string: str) -> str:
    This function is used as a get_parser for various
    parameters in this driver
    return string.strip('"')

[docs]class TektronixDPOModeError(Exception): """ Raise this exception if we are in a wrong mode to perform an action """ pass
ModeError = TektronixDPOModeError """ Alias for backwards compatibility """ class TektronixDPO7000xx(VisaInstrument): """ QCoDeS driver for the MSO/DPO5000/B, DPO7000/C, DPO70000/B/C/D/DX/SX, DSA70000/B/C/D, and MSO70000/C/DX Series Digital Oscilloscopes """ number_of_channels = 4 number_of_measurements = 8 # The number of available # measurements does not change. def __init__( self, name: str, address: str, **kwargs: Any ) -> None: super().__init__(name, address, terminator="\n", **kwargs) self.add_submodule( "horizontal", TektronixDPOHorizontal(self, "horizontal") ) self.add_submodule( "data", TektronixDPOData(self, "data") ) self.add_submodule( "waveform", TektronixDPOWaveformFormat( self, "waveform" ) ) measurement_list = ChannelList( self, "measurement", TektronixDPOMeasurement ) for measurement_number in range(1, self.number_of_measurements): measurement_name = f"measurement{measurement_number}" measurement_module = TektronixDPOMeasurement( self, measurement_name, measurement_number ) self.add_submodule(measurement_name, measurement_module) measurement_list.append(measurement_module) self.add_submodule("measurement", measurement_list) self.add_submodule( "statistics", TektronixDPOMeasurementStatistics( self, "statistics" ) ) channel_list = ChannelList(self, "channel", TektronixDPOChannel) for channel_number in range(1, self.number_of_channels + 1): channel_name = f"channel{channel_number}" channel_module = TektronixDPOChannel( self, channel_name, channel_number, ) self.add_submodule(channel_name, channel_module) channel_list.append(channel_module) self.add_submodule("channel", channel_list) self.add_submodule( "trigger", TekronixDPOTrigger(self, "trigger") ) self.add_submodule( "delayed_trigger", TekronixDPOTrigger(self, "delayed_trigger", delayed_trigger=True) ) self.connect_message() def ask_raw(self, cmd: str) -> str: """ Sometimes the instrument returns non-ascii characters in response strings manually adjust the encoding to latin-1 """ self.visa_log.debug(f"Querying: {cmd}") self.visa_handle.write(cmd) response ="latin-1") self.visa_log.debug(f"Response: {response}") return response
[docs]class TektronixDPOData(InstrumentChannel): """ This submodule sets and retrieves information regarding the data source for the "CURVE?" query, which is used when retrieving waveform data. """ def __init__( self, parent: Union[Instrument, InstrumentChannel], name: str ) -> None: super().__init__(parent, name) # We can choose to retrieve data from arbitrary # start and stop indices of the buffer. self.add_parameter( "start_index", get_cmd="DATa:STARt?", set_cmd="DATa:STARt {}", get_parser=int ) self.add_parameter( "stop_index", get_cmd="DATa:STOP?", set_cmd="DATa:STOP {}", get_parser=int ) self.add_parameter( "source", get_cmd="DATa:SOU?", set_cmd="DATa:SOU {}", vals=Enum(*TekronixDPOWaveform.valid_identifiers) ) self.add_parameter( "encoding", get_cmd="DATa:ENCdg?", set_cmd="DATa:ENCdg {}", get_parser=strip_quotes, vals=Enum( "ASCIi", "FAStest", "RIBinary", "RPBinary", "FPBinary", "SRIbinary", "SRPbinary", "SFPbinary", ), docstring=textwrap.dedent(""" For a detailed explanation of the set arguments, please consult the programmers manual at page 263/264. """) )
[docs]class TekronixDPOWaveform(InstrumentChannel): """ This submodule retrieves data from waveform sources, e.g. channels. """ valid_identifiers = [ f"{source_type}{i}" for source_type in ["CH", "MATH", "REF"] for i in range(1, TektronixDPO7000xx.number_of_channels + 1) ] def __init__( self, parent: Union[Instrument, InstrumentChannel], name: str, identifier: str, ) -> None: super().__init__(parent, name) if identifier not in self.valid_identifiers: raise ValueError( f"Identifier {identifier} must be one of " f"{self.valid_identifiers}" ) self._identifier = identifier self.add_parameter( "raw_data_offset", get_cmd=self._get_cmd("WFMOutPRE:YOFF?"), get_parser=float, docstring=textwrap.dedent(""" Raw acquisition values range from min to max. For instance, for unsigned binary values of one byte, min=0 and max=255. The data offset specifies the center of this range """) ) self.add_parameter( "x_unit", get_cmd=self._get_cmd("WFMOutpre:XUNit?"), get_parser=strip_quotes ) self.add_parameter( "x_increment", get_cmd=self._get_cmd("WFMOutPRE:XINCR?"), unit=self.x_unit(), get_parser=float ) self.add_parameter( "y_unit", get_cmd=self._get_cmd("WFMOutpre:YUNit?"), get_parser=strip_quotes ) self.add_parameter( "offset", get_cmd=self._get_cmd("WFMOutPRE:YZERO?"), get_parser=float, unit=self.y_unit() ) self.add_parameter( "scale", get_cmd=self._get_cmd("WFMOutPRE:YMULT?"), get_parser=float, unit=self.y_unit() ) self.add_parameter( "length", get_cmd=self._get_cmd("WFMOutpre:NR_Pt?"), get_parser=int ) hor_unit = self.x_unit() hor_label = "Time" if hor_unit == "s" else "Frequency" self.add_parameter( "trace_axis", label=hor_label, get_cmd=self._get_trace_setpoints, vals=Arrays(shape=(self.length,)), unit=hor_unit ) ver_unit = self.y_unit() ver_label = "Voltage" if ver_unit == "s" else "Amplitude" self.add_parameter( "trace", label=ver_label, get_cmd=self._get_trace_data, vals=Arrays(shape=(self.length,)), unit=ver_unit, setpoints=(self.trace_axis,), parameter_class=ParameterWithSetpoints ) def _get_cmd(self, cmd_string: str) -> Callable[[], str]: """ Parameters defined in this submodule require the correct data source being selected first. """ def inner() -> str: return self.ask(cmd_string) return inner def _get_trace_data(self) -> np.ndarray: waveform = self.root_instrument.waveform if not waveform.is_binary(): raw_data = self.root_instrument.visa_handle.query_ascii_values( "CURVE?", container=np.array ) else: bytes_per_sample = waveform.bytes_per_sample() data_type = {1: "b", 2: "h", 4: "f", 8: "d"}[ bytes_per_sample ] if waveform.data_format() == "unsigned_integer": data_type = data_type.upper() is_big_endian = waveform.is_big_endian() raw_data = self.root_instrument.visa_handle.query_binary_values( "CURVE?", datatype=data_type, is_big_endian=is_big_endian, container=np.array ) return (raw_data - self.raw_data_offset()) * self.scale() \ + self.offset() def _get_trace_setpoints(self) -> np.ndarray: """ Infer the set points of the waveform """ sample_count = self.length() x_increment = self.x_increment() return np.linspace(0, x_increment * sample_count, sample_count)
[docs]class TektronixDPOWaveformFormat(InstrumentChannel): """ With this sub module we can query waveform formatting data. Please note that parameters defined in this submodule effects all waveform sources, whereas parameters defined in the submodule 'TekronixDPOWaveform' apply to specific waveform sources (e.g. channel1 or math2) """ def __init__( self, parent: Union[Instrument, InstrumentChannel], name: str ) -> None: super().__init__(parent, name) self.add_parameter( "data_format", get_cmd="WFMOutpre:BN_Fmt?", set_cmd="WFMOutpre:BN_Fmt {}", val_mapping={ "signed_integer": "RI", "unsigned_integer": "RP", "floating_point": "FP" } ) self.add_parameter( "is_big_endian", get_cmd="WFMOutpre:BYT_Or?", set_cmd="WFMOutpre:BYT_Or {}", val_mapping={ False: "LSB", True: "MSB" } ) self.add_parameter( "bytes_per_sample", get_cmd="WFMOutpre:BYT_Nr?", set_cmd="WFMOutpre:BYT_Nr {}", get_parser=int, vals=Enum(1, 2, 4, 8) ) self.add_parameter( "is_binary", get_cmd="WFMOutpre:ENCdg?", set_cmd="WFMOutpre:ENCdg {}", val_mapping={ True: "BINARY", False: "ASCII" } )
[docs]class TektronixDPOChannel(InstrumentChannel): """ The main channel module for the oscilloscope. The parameters defined here reflect the waveforms as they are displayed on the instrument display. """ def __init__( self, parent: Union[Instrument, InstrumentChannel], name: str, channel_number: int, ) -> None: super().__init__(parent, name) self._identifier = f"CH{channel_number}" self.add_submodule( "waveform", TekronixDPOWaveform( self, "waveform", self._identifier ) ) self.add_parameter( "scale", get_cmd=f"{self._identifier}:SCA?", set_cmd=f"{self._identifier}:SCA {{}}", get_parser=float, unit="V/div" ) self.add_parameter( "offset", get_cmd=f"{self._identifier}:OFFS?", set_cmd=f"{self._identifier}:OFFS {{}}", get_parser=float, unit="V" ) self.add_parameter( "position", get_cmd=f"{self._identifier}:POS?", set_cmd=f"{self._identifier}:POS {{}}", get_parser=float, unit="V" ) self.add_parameter( "termination", get_cmd=f"{self._identifier}:TER?", set_cmd=f"{self._identifier}:TER {{}}", vals=Enum(50, 1E6), get_parser=float, unit="Ohm" ) self.add_parameter( "analog_to_digital_threshold", get_cmd=f"{self._identifier}:THRESH?", set_cmd=f"{self._identifier}:THRESH {{}}", get_parser=float, unit="V", ) self.add_parameter( "termination_voltage", get_cmd=f"{self._identifier}:VTERm:BIAS?", set_cmd=f"{self._identifier}:VTERm:BIAS {{}}", get_parser=float, unit="V" )
[docs] def set_trace_length(self, value: int) -> None: """ Set the trace length when retrieving data through the 'waveform' interface Args: value: The requested number of samples in the trace """ if self.root_instrument.horizontal.record_length() < value: raise ValueError( "Cannot set a trace length which is larger than " "the record length. Please switch to manual mode " "and adjust the record length first" )
[docs] def set_trace_time(self, value: float) -> None: """ Args: value: The time over which a trace is desired. """ sample_rate = self.root_instrument.horizontal.sample_rate() required_sample_count = int(sample_rate * value) self.set_trace_length(required_sample_count)
[docs]class TektronixDPOHorizontal(InstrumentChannel): """ This module controls the horizontal axis of the scope """ def __init__( self, parent: Union[Instrument, InstrumentChannel], name: str ) -> None: super().__init__(parent, name) self.add_parameter( "mode", get_cmd="HORizontal:MODE?", set_cmd="HORizontal:MODE {}", vals=Enum("auto", "constant", "manual"), get_parser=str.lower, docstring=""" Auto mode attempts to keep record length constant as you change the time per division setting. Record length is read only. Constant mode attempts to keep sample rate constant as you change the time per division setting. Record length is read only. Manual mode lets you change sample mode and record length. Time per division or Horizontal scale is read only. """ ) self.add_parameter( "unit", get_cmd="HORizontal:MAIn:UNIts?", get_parser=strip_quotes ) self.add_parameter( "record_length", get_cmd="HORizontal:MODE:RECOrdlength?", set_cmd=self._set_record_length, get_parser=float ) self.add_parameter( "sample_rate", get_cmd="HORizontal:MODE:SAMPLERate?", set_cmd="HORizontal:MODE:SAMPLERate {}", get_parser=float, unit=f"sample/{self.unit()}" ) self.add_parameter( "scale", get_cmd="HORizontal:MODE:SCAle?", set_cmd=self._set_scale, get_parser=float, unit=f"{self.unit()}/div" ) self.add_parameter( "position", get_cmd="HORizontal:POSition?", set_cmd="HORizontal:POSition {}", get_parser=float, unit="%", docstring=textwrap.dedent(""" The horizontal position relative to a received trigger. E.g. a value of '10' sets the trigger position of the waveform such that 10% of the display is to the left of the trigger position. """) ) self.add_parameter( "roll", get_cmd="HORizontal:ROLL?", set_cmd="HORizontal:ROLL {}", vals=Enum("Auto", "On", "Off"), docstring=textwrap.dedent(""" Use Roll Mode when you want to view data at very slow sweep speeds. """) ) def _set_record_length(self, value: int) -> None: if self.mode() != "manual": raise TektronixDPOModeError( "The record length can only be changed in manual mode" ) self.write(f"HORizontal:MODE:RECOrdlength {value}") def _set_scale(self, value: float) -> None: if self.mode() == "manual": raise TektronixDPOModeError("The scale cannot be changed in manual mode") self.write(f"HORizontal:MODE:SCAle {value}")
[docs]class TekronixDPOTrigger(InstrumentChannel): """ Submodule for trigger setup. You can trigger with the A (Main) trigger system alone or combine the A (Main) trigger with the B (Delayed) trigger to trigger on sequential events. When using sequential triggering, the A trigger event arms the trigger system, and the B trigger event triggers the instrument when the B trigger conditions are met. A and B triggers can (and typically do) have separate sources. The B trigger condition is based on a time delay or a specified number of events. See page75, Using A (Main) and B (Delayed) triggers. """ def __init__( self, parent: Instrument, name: str, delayed_trigger: bool = False ): super().__init__(parent, name) self._identifier = "B" if delayed_trigger else "A" trigger_types = ["edge", "logic", "pulse"] if self._identifier == "A": trigger_types.extend([ "video", "i2c", "can", "spi", "communication", "serial", "rs232" ]) self.add_parameter( "type", get_cmd=f"TRIGger:{self._identifier}:TYPE?", set_cmd=self._trigger_type, vals=Enum(*trigger_types), get_parser=str.lower ) edge_couplings = ["ac", "dc", "hfrej", "lfrej", "noiserej"] if self._identifier == "B": edge_couplings.append("atrigger") self.add_parameter( "edge_coupling", get_cmd=f"TRIGger:{self._identifier}:EDGE:COUPling?", set_cmd=f"TRIGger:{self._identifier}:EDGE:COUPling {{}}", vals=Enum(*edge_couplings), get_parser=str.lower ) self.add_parameter( "edge_slope", get_cmd=f"TRIGger:{self._identifier}:EDGE:SLOpe?", set_cmd=f"TRIGger:{self._identifier}:EDGE:SLOpe {{}}", vals=Enum("rise", "fall", "either"), get_parser=str.lower ) trigger_sources = [ f"CH{i}" for i in range(1, TektronixDPO7000xx.number_of_channels) ] trigger_sources.extend([ f"D{i}" for i in range(0, 16) ]) if self._identifier == "A": trigger_sources.append("line") self.add_parameter( "source", get_cmd=f"TRIGger:{self._identifier}:EDGE:SOUrce?", set_cmd=f"TRIGger:{self._identifier}:EDGE:SOUrce {{}}", vals=Enum(*trigger_sources) ) def _trigger_type(self, value: str) -> None: if value != "edge": raise NotImplementedError( "We currently only support the 'edge' trigger type" ) self.write(f"TRIGger:{self._identifier}:TYPE {value}")
[docs]class TektronixDPOMeasurementParameter(Parameter): """ A measurement parameter does not only return the instantaneous value of a measurement, but can also return some statistics. The accumulation time over which these statistics are gathered can be controlled through the 'time_constant' parameter on the submodule 'TektronixDPOMeasurementStatistics'. Here we also find the method 'reset' to reset the values over which the statistics are gathered. """ # pylint: disable=method-hidden def _get(self, metric: str) -> float: measurement_channel = cast(TektronixDPOMeasurement, self.instrument) if measurement_channel.type.get_latest() != measurement_channel.type( measurement_channel.state(1) measurement_channel.wait_adjustment_time() measurement_number = measurement_channel.measurement_number str_value = measurement_channel.ask( f"MEASUrement:MEAS{measurement_number}:{metric}?" ) return float(str_value)
[docs] def mean(self) -> float: return self._get("MEAN")
[docs] def max(self) -> float: return self._get("MAX")
[docs] def min(self) -> float: return self._get("MINI")
[docs] def stdev(self) -> float: return self._get("STDdev")
[docs] def get_raw(self) -> float: return self._get("VALue")
[docs] def set_raw(self, value: Any) -> None: raise ValueError("A measurement cannot be set")
[docs]class TektronixDPOMeasurement(InstrumentChannel): """ The measurement submodule """ # It was found by trial and error that adjusting # the measurement type and source takes some time # to reflect properly on the value of the # measurement. Wait a minimum of ... _minimum_adjustment_time = 0.1 # seconds after setting measurement type/source before # calling the measurement value SCPI command. measurements = [ ('amplitude', 'V'), ('area', 'Vs'), ('burst', 's'), ('carea', 'Vs'), ('cmean', 'V'), ('crms', 'V'), ('delay', 's'), ('distduty', '%'), ('extinctdb', 'dB'), ('extinctpct', '%'), ('extinctratio', ''), ('eyeheight', 'V'), ('eyewidth', 's'), ('fall', 's'), ('frequency', 'Hz'), ('high', 'V'), ('hits', 'hits'), ('low', 'V'), ('maximum', 'V'), ('mean', 'V'), ('median', 'V'), ('minimum', 'V'), ('ncross', 's'), ('nduty', '%'), ('novershoot', '%'), ('nwidth', 's'), ('pbase', 'V'), ('pcross', 's'), ('pctcross', '%'), ('pduty', '%'), ('peakhits', 'hits'), ('period', 's'), ('phase', '°'), ('pk2pk', 'V'), ('pkpkjitter', 's'), ('pkpknoise', 'V'), ('povershoot', '%'), ('ptop', 'V'), ('pwidth', 's'), ('qfactor', ''), ('rise', 's'), ('rms', 'V'), ('rmsjitter', 's'), ('rmsnoise', 'V'), ('sigma1', '%'), ('sigma2', '%'), ('sigma3', '%'), ('sixsigmajit', 's'), ('snratio', ''), ('stddev', 'V'), ('undefined', ''), ('waveforms', 'wfms') ] def __init__( self, parent: Instrument, name: str, measurement_number: int ) -> None: super().__init__(parent, name) self._measurement_number = measurement_number self._adjustment_time = time.perf_counter() self.add_parameter( "state", get_cmd=f"MEASUrement:MEAS{self._measurement_number}:STATe?", set_cmd=f"MEASUrement:MEAS{self._measurement_number}:STATe {{}}", val_mapping=create_on_off_val_mapping(on_val="1", off_val="0") ) self.add_parameter( "type", get_cmd=f"MEASUrement:MEAS{self._measurement_number}:TYPe?", set_cmd=self._set_measurement_type, get_parser=str.lower, vals=Enum(*(m[0] for m in self.measurements)), docstring=textwrap.dedent( "Please see page 566-569 of the programmers manual " "for a detailed description of these arguments. " "" ) ) for measurement, unit in self.measurements: self.add_parameter( name=measurement, unit=unit, parameter_class=TektronixDPOMeasurementParameter ) for src in [1, 2]: self.add_parameter( f"source{src}", get_cmd=f"MEASUrement:MEAS{self._measurement_number}:SOUrce" f"{src}?", set_cmd=partial(self._set_source, src), vals=Enum( *(TekronixDPOWaveform.valid_identifiers + ["HISTogram"]) ) ) @property def measurement_number(self) -> int: return self._measurement_number def _set_measurement_type(self, value: str) -> None: self._adjustment_time = time.perf_counter() self.write( f"MEASUrement:MEAS{self._measurement_number}:TYPe {value}" ) def _set_source(self, source_number: int, value: str) -> None: self._adjustment_time = time.perf_counter() self.write( f"MEASUrement:MEAS{self._measurement_number}:SOUrce{source_number} " f"{value}" )
[docs] def wait_adjustment_time(self) -> None: """ Wait until the minimum time after adjusting the measurement source or type has elapsed """ time_since_adjust = time.perf_counter() - self._adjustment_time if time_since_adjust < self._minimum_adjustment_time: time_remaining = self._minimum_adjustment_time - time_since_adjust time.sleep(time_remaining)
[docs]class TektronixDPOMeasurementStatistics(InstrumentChannel): def __init__(self, *args: Any, **kwargs: Any): super().__init__(*args, **kwargs) self.add_parameter( "mode", get_cmd="MEASUrement:STATIstics:MODe?", set_cmd="MEASUrement:STATIstics:MODe {}", vals=Enum( "OFF", "ALL", "VALUEMean", "MINMax", "MEANSTDdev" ), docstring=textwrap.dedent( "This command controls the operation and display of measurement " "statistics. " "1. OFF turns off all measurements. This is the default value " "2. ALL turns on statistics and displays all statistics for " "each measurement. " "3. VALUEMean turns on statistics and displays the value and the " "mean (μ) of each measurement. " "4. MINMax turns on statistics and displays the min and max of " "each measurement. " "5. MEANSTDdev turns on statistics and displays the mean and " "standard deviation of each measurement." ) ) self.add_parameter( "time_constant", get_cmd="MEASUrement:STATIstics:WEIghting?", set_cmd="MEASUrement:STATIstics:WEIghting {}", get_parser=int, docstring=textwrap.dedent( "This command sets or queries the time constant for mean and " "standard deviation statistical accumulations, which is equivalent " "to selecting Measurement Setup from the Measure menu, clicking " "the Statistics button and entering the desired Weight n= value." ) )
[docs] def reset(self) -> None: self.write("MEASUrement:STATIstics:COUNt RESEt")