from enum import Enum
from ..visa import VisaDevice
[ドキュメント]class E4980(VisaDevice):
"""
Keysight E4980A Precision LCR Meter
"""
_idn_pattern = "E4980"
def _initialize(self, **kwargs):
self.visa_write("*RST;*CLS")
self.visa_write('FORMAT ASC;TRIG:SOUR BUS')
self.visa_write(':INIT:CONT ON')
self.visa_write(':TRIG:DEL 0')
self.visa_write('*SRE 1')
[ドキュメント] def trigger(self, f: float, *, time: str = "MED", ampl: float = 0.1, format: str = "ZTD"):
"""
measure impedance
Args:
f (float): frequency to measure
Keyword Args:
ampl (float): measurement amplitude [V]
time (str): measurement time from {"LONG", "MED", "SHORT"}
format (str): format of return value from
{"CPD", "CPQ", "CPG", "CPRP", "CSD", "CSQ", "CSRS", "LPD", "LPQ", "LPG", "LPRP", "LSD", "LSQ", "LSRS", "RX", "ZTD", "ZTR", "GB", "YTD", "YTR"}
Returns:
[float, float]: Measured impedance value
"""
# valitdate args
if time not in ["LONG", "MED", "SHORT"]:
raise ValueError(f"Unknown time: {time}")
if format not in ["CPD", "CPQ", "CPG", "CPRP", "CSD", "CSQ", "CSRS", "LPD", "LPQ", "LPG", "LPRP", "LSD", "LSQ", "LSRS", "RX", "ZTD", "ZTR", "GB", "YTD", "YTR"]:
raise ValueError(f"Unknown format: {format}")
self.visa_write(f'FUNC:IMP {format}')
self.visa_write(f'APER {time}')
self.visa_write(f'VOLT {ampl}')
self.visa_write(f'FREQ:CW {f}')
ret = self.visa_query(f'*TRG')
Z, t, *_ = map(float, ret.split(","))
return (Z, t)