MEASUREMENT_T3DSO1XXX
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Take a measurement from an T3DSO1000(A)-2000 oscilloscope. Install, starts, and get the measurement of the specified source.
Requires a CONNECT_T3DSO1XXX block at the start of the app to connect with
the instrument. The VISA address will then be listed under 'connection'.
Requires a STATISTIC_TOGGLE_T3DSO block to be enabled to get the statistics.
This block should work with any Teledyne LeCroy T3DSO1000(A)-2000 series oscilloscope. Params: connection : VisaConnection The VISA address (requires the CONNECT_T3DSO1XXX block). trace : Literal The trace to read the waveform from. measurement : Literal The name of the measurement to take. statistic : Literal The statistic to take. default : DataContainer The input data container. Returns: out : Scalar The measured value.
Python Code
from flojoy import flojoy, DataContainer, VisaConnection, Scalar
from typing import Optional, Literal
import re
import logging
from time import sleep
@flojoy(inject_connection=True)
def MEASUREMENT_T3DSO1XXX(
connection: VisaConnection,
trace: Literal["C1", "C2", "C3", "C4"] = "C1",
measurement: Literal[
"Vertical peak-to-peak",
"Maximum vertical value",
"Minimum vertical value",
"Vertical amplitude",
"Waveform top value",
"Waveform base value",
"Average value in the first cycle",
"Average value",
"RMS value",
"RMS value in the first cycle",
"Overshoot of a falling edge",
"Preshoot of a falling edge",
"Overshoot of a rising edge",
"Preshoot of a rising edge",
"Period",
"Frequency",
"Positive pulse width",
"Negative pulse width",
"Rise-time",
"Fall-time",
"Burst width",
"Positive duty cycle",
"Negative duty cycle",
] = "Vertical peak-to-peak",
statistic: Literal[
"Instant",
"Mean",
"Min",
"Max",
"Std-dev",
"count",
] = "Instant",
default: Optional[DataContainer] = None,
) -> Scalar:
"""Take a measurement from an T3DSO1000(A)-2000 oscilloscope.
Install, starts, and get the measurement of the specified source.
Requires a CONNECT_T3DSO1XXX block at the start of the app to connect with
the instrument. The VISA address will then be listed under 'connection'.
Requires a STATISTIC_TOGGLE_T3DSO block to be enabled to get the statistics.
This block should work with any Teledyne LeCroy T3DSO1000(A)-2000 series oscilloscope.
Parameters
----------
connection: VisaConnection
The VISA address (requires the CONNECT_T3DSO1XXX block).
trace: Literal
The trace to read the waveform from.
measurement: Literal
The name of the measurement to take.
statistic: Literal
The statistic to take.
default: DataContainer
The input data container.
Returns
-------
Scalar
The measured value.
"""
MEASUREMENT_MODES_T3DSO = {
"Vertical peak-to-peak": "PKPK",
"Maximum vertical value": "MAX",
"Minimum vertical value": "MIN",
"Vertical amplitude": "AMPL",
"Waveform top value": "TOP",
"Waveform base value": "BASE",
"Average value in the first cycle": "CMEAN",
"Average value": "MEAN",
"RMS value": "RMS",
"RMS value in the first cycle": "CRMS",
"Overshoot of a falling edge": "OVSN",
"Preshoot of a falling edge": "FPRE",
"Overshoot of a rising edge": "OVSP",
"Preshoot of a rising edge": "RPRE",
"Period": "PER",
"Frequency": "FREQ",
"Positive pulse width": "PWID",
"Negative pulse width": "NWID",
"Rise-time": "RISE",
"Fall-time": "FALL",
"Burst width": "WID",
"Positive duty cycle": "DUTY",
"Negative duty cycle": "NDUTY",
}
def enable_statistic(scope):
"""
To enable statistic, scope need to be in the "Measurement On && Statistics On" state.
To enable statistic, "Measurement" need to be enabled.
"""
def is_statistic_enabled():
scope.write("PACU FREQ,C1")
return "STAT1:OFF" not in scope.query("PAVA? STAT1")
if is_statistic_enabled():
return
scope.write("SY_FP 4,1") # Enable statistic
sleep(1)
if is_statistic_enabled():
return
# Measurement was off, enable measurement
scope.write("SY_FP 26,1") # Enable measurement
sleep(1)
if is_statistic_enabled():
return
else:
scope.write("SY_FP 4,1")
sleep(1)
assert is_statistic_enabled(), "Failed to enable statistic"
scope = connection.get_handle()
install_and_start_measurement_cmd = (
f"PACU {MEASUREMENT_MODES_T3DSO[measurement]},{trace}"
)
scope.write(install_and_start_measurement_cmd)
m = None
if statistic == "Instant":
get_m_cmd = f"{trace}:PAVA? {MEASUREMENT_MODES_T3DSO[measurement]}"
m = scope.query(get_m_cmd)
m = m.strip("\n").split(",")[1]
else:
# Find the statistics - New statistics are added to the end of the statistic table
enable_statistic(scope)
stat_name = f"{trace} {MEASUREMENT_MODES_T3DSO[measurement]}".lower()
stat_value = None
for stat_idx in range(5, 0, -1):
# Ex: "STAT4 C2 AMPL:cur,3.260000E+00,mean,3.260000E+00,..."
name, values = (
scope.query(f"PAVA? STAT{stat_idx}").lower().strip("\n").split(":")
)
if stat_name in name:
stat_value = values
break
if stat_value is None:
raise Exception(
f"Could not find the statistics of {measurement}, is the statistic block enable?"
)
# Get the statistics for the trace and measurement
pairs = stat_value.split(",")
value = {pairs[i]: pairs[i + 1] for i in range(0, len(pairs), 2)}
m = value[statistic.lower()].upper()
if m is None:
raise ValueError(f"Could not find the statistic {statistic}")
# Revome unit from the measurement (if present)
logging.info(f"Measurement: {m}")
match = re.search(r"E[+-]\d{2}", m)
m = m[: match.end()] if match is not None else m
return Scalar(float(m))
Example App
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This app shows how to use the blocks for a T3DSO1000(A)-2000 oscilloscope.
Blocks used:
CONNECT_T3DSO1XXXRESET_T3DSO1XXXAUTO_SETUP_T3DSO1XXXDISPLAY_ON_OFF_T3DSO1XXXSET_HORIZONTAL_SCALE_T3DSO1XXXSET_VERTICAL_SCALE_T3DSO1XXXEXTRACT_TRACE_T3DSO1XXXMEASUREMENT_T3DSO1XXXSCREENSHOT_T3DSO1XXX- 2x
BIG_NUMBER SCATTERIMAGE
The blocks were connected as shown, and the app was run. The result displayed the trace of the signal, the frequency, and the amplitude of the signal, along with a screenshot of the oscilloscope screen for verification.