#%% initialization
import numpy as np
from pylab import *
# Import instruments
from amcc.instruments.srs_sim970 import SIM970
from amcc.instruments.srs_sim928 import SIM928
from amcc.instruments import Switchino
# Setup instruments
dmm = SIM970('GPIB0::4', sim900port=7)
vs1 = SIM928('GPIB0::4', sim900port=3)
vs2 = SIM928('GPIB0::4', sim900port=4)
vs3 = SIM928('GPIB0::4', sim900port=5)
switch = Switchino('COM7')
#import functions
from vt__meas_util import iv_sweep_srs__current_bias, flux_purge_srs, sq_voltage_vs_incoil_current
#%% measurement specifics
#squid ports
incoil_v_source_srs = vs1
squid_v_source_srs = vs2
addflux_v_srs = vs3
squid_v_meas_srs = dmm
squid_v_meas_srs_dmm_channel = 4
dmm.set_impedance(gigaohm=False, channel=squid_v_meas_srs_dmm_channel)
#resistors in series with voltage sources
heater_output = [-1, 1] + [-1] * 510
marker_output = [0, 1] + [0] * 510
awgw.create_waveform(voltages=heater_output,
filename='heater.wfm',
marker1_data=marker_output)
awgw.load_file('heater.wfm', channel=1)
awgw.set_vhighlow(vlow=0, vhigh=0.1)
awgw.set_marker_vhighlow(vlow=0, vhigh=1)
awgw.set_trigger_mode(trigger_mode=True)
awgw.set_lowpass_filter()
awgw.set_output(True)
awgw.trigger_now()
# Setup bias source
vs = SIM928('GPIB0::4', 3)
vs.reset()
vs.set_output(True)
dmm = SIM970('GPIB0::4', 7)
#%%============================================================================
# High-speed latching device 2D map - pulse time & amplitude
#
# For latching devices - Applies a single pulse to the resistor, then measures
# an attached DMM to see if the device was triggered (latched)
#==============================================================================
# Connector AWG520 Marker1 output to AWG610 ext. trigger input
# Manually load 'sin.wfm' on CH1 of AWG520
# Manually set trigger to "External" on AWG610
data = locals()
return data
#%%============================================================================
# Setup instruments
#==============================================================================
#lecroy = LeCroy620Zi("TCPIP::%s::INSTR" % '192.168.1.100')
#awg = RigolDG5000('USB0::0x1AB1::0x0640::DG5T171200124::INSTR')
switch = Switchino('COM7')
counter1_snspd = Agilent53131a('GPIB0::12::INSTR')
counter2_readout = Agilent53131a('GPIB0::10::INSTR')
vs1_snspd = SIM928('GPIB0::4', 3)
vs2_readout = SIM928('GPIB0::4', 4)
#%%============================================================================
# TCI counts vs bias measurement setup
#
# For nonlatching devices - The bias is constant. The bias is set for both
# the readout nanowire and the SNSPD, then counts vs time are measured
# Switch 1 / Counter 1 = SNSPD
# Switch 2 / Counter 2 = Readout
#==============================================================================
trigger_voltage = 0.05
count_time = 0.1
# Setup counter
T = 1 / (-0.319941226 + 5.74884E-8 * pow(R, 2) * np.log(R) -
8.8409E-11 * pow(R, 3))
return T
#%%============================================================================
# Setup instruments
#==============================================================================
# Close all open resources
rm = visa.ResourceManager()
[i.close() for i in rm.list_opened_resources()]
# Connect to instruments
counter = Agilent53131a('GPIB0::8::INSTR')
vs = SIM928('GPIB0::13', 3)
dmm = SIM970('GPIB0::13', 7)
att = Agilent81567('GPIB0::10', slot=9)
att2 = Agilent81567('GPIB0::10', slot=12)
att3 = Agilent81567('GPIB0::10', slot=15)
switch = Switchino('COM12')
#srs_temp_sensor = SIM921('GPIB0::6', sim900port = 5)
# Setup SRS voltage source and DMM
vs.reset()
vs.set_output(True)
# Setup counter
counter.basic_setup()
counter.set_impedance(ohms=50)
counter.setup_timed_count()
import time
import pandas as pd
import numpy as np
import datetime
import visa
# c = Agilent53131a('GPIB0::10')
# c.basic_setup()
# c.set_trigger(-0.075)
# Close all open resources
#rm = visa.ResourceManager()
#[i.close() for i in rm.list_opened_resources()]
counter = Agilent53131a('GPIB0::12::INSTR')
vs = SIM928('GPIB0::4', 5)
switch = Switchino('COM7')
att = JDSHA9('GPIB0::15::INSTR')
#from unittest.mock import Mock; att = Mock()
#from unittest.mock import Mock; switch = Mock()
# Setup parameters
counter.basic_setup()
counter.set_impedance(ohms=50)
counter.setup_timed_count()
counter.set_trigger(trigger_voltage=0.030, slope_positive=True, channel=1)
vs.reset()
vs.set_output(True)
R_bias = 10e3
mask = (V < voltage_range) & (V > -voltage_range)
p = np.polyfit(V[mask], I[mask], deg=1)
resistance = 1 / p[0]
print('Resistance around zero %0.2f Ohm)' % (resistance))
#%% OPTIONAL: Set up SRS-based high-impedance IV curve
from amcc.instruments.srs_sim970 import SIM970
from amcc.instruments.srs_sim928 import SIM928
vs_slot = 4
dmm_slot = 7
dmm_channel = 2
dmm = SIM970('GPIB0::4', dmm_slot)
vs = SIM928('GPIB0::4', vs_slot)
dmm.set_impedance(gigaohm=True, channel=dmm_channel)
dmm.set_impedance(gigaohm=True, channel=4)
def run_iv_sweep_srs(voltages, R_series, delay=0.75):
vs.reset()
vs.set_output(True)
time.sleep(2)
V = []
I = []
for v in voltages:
vs.set_voltage(v)
time.sleep(delay)
v1 = dmm.read_voltage(channel=4)
#%%
# Import instruments
from amcc.instruments.srs_sim970 import SIM970
from amcc.instruments.srs_sim928 import SIM928
from amcc.instruments import Switchino
# Setup instruments
dmm = SIM970('GPIB0::4', sim900port=7)
vs = SIM928('GPIB0::4', sim900port=4)
switch = Switchino('COM7')
dmm.set_impedance(gigaohm=False, channel=2)
dmm.set_impedance(gigaohm=False, channel=3)
#%%
def run_iv_sweep_srs(voltages, R_series, delay=0.75):
vs.reset()
vs.set_output(True)
time.sleep(2)
V = []
I = []
for v in voltages:
vs.set_voltage(v)
time.sleep(delay)
# v1 = dmm.read_voltage(channel = 1)
v1 = v
v2 = dmm.read_voltage(channel=2)
v3 = dmm.read_voltage(channel=3)
V.append(v3)