def sweep(roach, center_frequencies, sample_exponent, offset_frequencies=None, reads_per_step=2, transient_wait=0,
run=lambda: None):
n_samples = 2 ** sample_exponent
if offset_frequencies is None:
frequency_resolution = roach.fs / n_samples
offset_frequencies = frequency_resolution * offset_integers[sample_exponent]
sweeps.prepare_sweep(roach, center_frequencies, offset_frequencies, n_samples)
roach._sync()
time.sleep(transient_wait)
run()
sweep_data = sweeps.do_prepared_sweep(roach, nchan_per_step=len(center_frequencies), reads_per_step=reads_per_step)
return sweep_data
def record_sweep(roach, center_frequencies, offset_frequencies, attenuation, n_samples, suffix, interactive=False):
n_channels = center_frequencies.size
df = data_file.DataFile(suffix=suffix)
print("Writing data to " + df.filename)
print("Setting DAC attenuator to {:.1f} dB".format(attenuation))
roach.set_dac_attenuator(attenuation)
print("Sweep memory usage is {:.1f} MB of {:.1f} MB capacity.".format(
memory_usage_bytes(offset_frequencies.shape[0], n_samples) / 2 ** 20, EFFECTIVE_DRAM_CAPACITY / 2 ** 20))
measured_frequencies = sweeps.prepare_sweep(roach, center_frequencies, offset_frequencies, n_samples)
roach._sync()
time.sleep(0.2)
df.log_hw_state(roach)
if interactive:
raw_input("Hit enter to begin recording frequency sweep.")
else:
print("Recording frequency sweep.")
sweep_start_time = time.time()
sweep_data = sweeps.do_prepared_sweep(roach, nchan_per_step=n_channels, reads_per_step=8)
print("Elapsed time {:.0f} seconds. Writing to disk.".format(time.time() - sweep_start_time))
df.add_sweep(sweep_data)
df.sync()
resonators = fit_sweep_data(sweep_data)
fit_f0s = np.array([r.f_0 for r in resonators])
print("Initial frequencies in MHz are " + ', '.join(['{:.3f}'.format(f0) for f0 in center_frequencies]))
print("initial - fit [Hz]: " +
', '.join(['{:.0f}'.format(1e6 * delta_f) for delta_f in center_frequencies - fit_f0s]))
df.nc.close()
return df.filename, resonators
def sweep(roach,
center_frequencies,
sample_exponent,
offset_frequencies=None,
reads_per_step=2,
transient_wait=0,
run=lambda: None):
n_samples = 2**sample_exponent
if offset_frequencies is None:
frequency_resolution = roach.fs / n_samples
offset_frequencies = frequency_resolution * offset_integers[
sample_exponent]
sweeps.prepare_sweep(roach, center_frequencies, offset_frequencies,
n_samples)
roach._sync()
time.sleep(transient_wait)
run()
sweep_data = sweeps.do_prepared_sweep(
roach,
nchan_per_step=len(center_frequencies),
reads_per_step=reads_per_step)
return sweep_data
def record_sweep(roach,
center_frequencies,
offset_frequencies,
attenuation,
n_samples,
suffix,
interactive=False):
n_channels = center_frequencies.size
df = data_file.DataFile(suffix=suffix)
print("Writing data to " + df.filename)
print("Setting DAC attenuator to {:.1f} dB".format(attenuation))
roach.set_dac_attenuator(attenuation)
print("Sweep memory usage is {:.1f} MB of {:.1f} MB capacity.".format(
memory_usage_bytes(offset_frequencies.shape[0], n_samples) / 2**20,
EFFECTIVE_DRAM_CAPACITY / 2**20))
measured_frequencies = sweeps.prepare_sweep(roach, center_frequencies,
offset_frequencies, n_samples)
roach._sync()
time.sleep(0.2)
df.log_hw_state(roach)
if interactive:
raw_input("Hit enter to begin recording frequency sweep.")
else:
print("Recording frequency sweep.")
sweep_start_time = time.time()
sweep_data = sweeps.do_prepared_sweep(roach,
nchan_per_step=n_channels,
reads_per_step=8)
print("Elapsed time {:.0f} seconds. Writing to disk.".format(
time.time() - sweep_start_time))
df.add_sweep(sweep_data)
df.sync()
resonators = fit_sweep_data(sweep_data)
fit_f0s = np.array([r.f_0 for r in resonators])
print("Initial frequencies in MHz are " +
', '.join(['{:.3f}'.format(f0) for f0 in center_frequencies]))
print("initial - fit [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * delta_f)
for delta_f in center_frequencies - fit_f0s
]))
df.nc.close()
return df.filename, resonators
ri.set_lo(lo)
for atten in attenlist:
hittite.off()
print "setting attenuator to", atten
ri.set_dac_attenuator(atten)
nsamp = 2**16
step = 1
nstep = 32
f0binned = np.round(f0s * nsamp / 512.0) * 512.0 / nsamp
offset_bins = np.arange(-(nstep + 1), (nstep + 1)) * step
offsets = offset_bins * 512.0 / nsamp
measured_freqs = sweeps.prepare_sweep(ri,
f0binned,
offsets,
nsamp=nsamp)
print "loaded waveforms in", (time.time() - start), "seconds"
delay = -31.3
print "median delay is ", delay
df = data_file.DataFile(suffix=suffix)
df.nc.mmw_atten_turns = mmw_atten_turns
df.log_hw_state(ri)
sweep_data = sweeps.do_prepared_sweep(ri,
nchan_per_step=atonce,
reads_per_step=2)
df.add_sweep(sweep_data)
meas_cfs = []
idxs = []
def sweep_fit_timestream(roach,
center_frequencies,
offset_frequencies,
sweep_n_samples,
timestream_n_samples,
attenuation,
suffix,
time_in_seconds,
interactive=False,
coarse_multiplier=3):
df = data_file.DataFile(suffix=suffix)
print("Writing data to " + df.filename)
print("Setting DAC attenuator to {:.1f} dB".format(attenuation))
roach.set_dac_attenuator(attenuation)
print("Sweep memory usage is {:.1f} MB of {:.1f} MB capacity.".format(
memory_usage_bytes(offset_frequencies.shape[0], sweep_n_samples) /
2**20, EFFECTIVE_DRAM_CAPACITY / 2**20))
# Do a preliminary sweep to make sure the main sweeps are centered properly.
sweeps.prepare_sweep(roach, center_frequencies,
coarse_multiplier * offset_frequencies,
sweep_n_samples)
roach._sync()
time.sleep(0.2)
if interactive:
raw_input("Hit enter to record preliminary frequency sweep.")
else:
print("Recording preliminary frequency sweep.")
coarse_sweep_data = sweeps.do_prepared_sweep(
roach, nchan_per_step=center_frequencies.size, reads_per_step=8)
coarse_resonators = fit_sweep_data(coarse_sweep_data)
coarse_f0s = np.array([r.f_0 for r in coarse_resonators])
fine_center_frequencies = round_frequencies(coarse_f0s, roach.fs,
sweep_n_samples)
# Now do the actual sweep and save it.
sweeps.prepare_sweep(roach, fine_center_frequencies, offset_frequencies,
sweep_n_samples)
roach._sync()
time.sleep(0.2)
df.log_hw_state(roach)
if interactive:
raw_input("Hit enter to begin recording frequency sweep.")
else:
print("Recording frequency sweep.")
sweep_start_time = time.time()
sweep_data = sweeps.do_prepared_sweep(
roach, nchan_per_step=center_frequencies.size, reads_per_step=8)
print("Elapsed time {:.0f} seconds. Writing to disk.".format(
time.time() - sweep_start_time))
df.add_sweep(sweep_data)
df.sync()
resonators = fit_sweep_data(sweep_data)
fine_f0s = np.array([r.f_0 for r in resonators])
print("Initial frequencies in MHz are " +
', '.join(['{:.3f}'.format(f0) for f0 in center_frequencies]))
print("initial - fit [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * delta_f)
for delta_f in center_frequencies - fine_f0s
]))
timestream_measured_frequencies = roach.set_tone_frequencies(
fine_f0s, nsamp=timestream_n_samples)
roach.select_fft_bins(np.arange(roach.tone_bins.shape[1]))
roach._sync()
time.sleep(0.2)
df.log_hw_state(roach)
print("measured - fit [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * delta_f)
for delta_f in timestream_measured_frequencies - fine_f0s
]))
# This delay was added because the above lines cause some kind of transient signal that takes about three seconds
# to decay. This was showing up at the beginning of the timestreams with interactive=False.
minimum_wait = 5
wait_start_time = time.time()
if interactive:
raw_input(
"Hit enter to begin recording {:.0f} second timestream.".format(
time_in_seconds))
else:
print("Recording {:.0f} second timestream.".format(time_in_seconds))
while time.time() - wait_start_time < minimum_wait:
time.sleep(0.1)
timestream_start_time = time.time()
data, address = roach.get_data_seconds(time_in_seconds,
demod=True,
pow2=True)
print("Elapsed time {:.0f} seconds. Writing to disk.".format(
time.time() - timestream_start_time))
df.add_timestream_data(data, roach, timestream_start_time)
df.sync()
df.nc.close()
return df.filename
def mmw_source_power_step(f_initial_off,
f_initial_on,
attenuations,
f_mmw_source=0,
suffix="mmw",
hittite_power=0,
long_stream_time=30,
modulated_stream_time=4,
coarse_exponent=19,
fine_exponent=21,
modulation_rate_integer=7):
if f_mmw_source:
from kid_readout.equipment import hittite_controller
frequency_multiplication_factor = 12
hittite = hittite_controller.hittiteController()
hittite.set_power(hittite_power) # in dBm
hittite.set_freq(f_mmw_source /
frequency_multiplication_factor) # in Hz
hittite.on()
lockin = lockin_controller.lockinController()
print(lockin.get_idn())
roach = baseband.RoachBaseband()
n_coarse_samples = 2**coarse_exponent
n_fine_samples = 2**fine_exponent
coarse_frequency_resolution = roach.fs / n_coarse_samples
fine_frequency_resolution = roach.fs / n_fine_samples
coarse_offset_integers = offset_integers[coarse_exponent]
fine_offset_integers = offset_integers[fine_exponent]
f_coarse_offset = coarse_frequency_resolution * coarse_offset_integers
f_fine_offset = fine_frequency_resolution * fine_offset_integers
while True:
f_source_modulation = roach.set_modulation_output(
modulation_rate_integer)
print(
"\nSet source modulation frequency to {:.1f} Hz. Check the lock-in."
.format(f_source_modulation))
try:
mmw_attenuator_turns = float(
raw_input(
"Enter the value to which both attenuators are set, or hit Enter to stop recording data: "
))
except ValueError:
break
start_time = time.time()
df = data_file.DataFile(suffix=suffix)
df.nc.mmw_atten_turns = (mmw_attenuator_turns, mmw_attenuator_turns)
maximum_attenuation = max(attenuations)
print(
"Setting DAC attenuator to maximum requested attenuation of {:.1f} dB."
.format(maximum_attenuation))
roach.set_dac_attenuator(maximum_attenuation)
# At the lowest readout power, record a coarse sweep with the source off and a modulated stream at the fit
# source-off resonances.
sweeps.prepare_sweep(roach, f_initial_off, f_coarse_offset,
n_coarse_samples)
coarse_sweep_off, stream_mod_off = mmw_source_sweep_and_stream(
df, roach, lockin, modulated_stream_time, False, f_mmw_source,
'high', modulation_rate_integer, modulation_rate_integer)
f_coarse_fit_off = np.array(
[r.f_0 for r in fit_sweep_data(coarse_sweep_off)])
print("Source off: coarse - initial [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * diff)
for diff in f_coarse_fit_off - f_initial_off
]))
# At the lowest readout power, record a fine sweep and long stream with the source off.
sweeps.prepare_sweep(roach, f_coarse_fit_off, f_fine_offset,
n_fine_samples)
fine_sweep_off, stream_off = mmw_source_sweep_and_stream(
df, roach, lockin, long_stream_time, False, f_mmw_source, 'high',
'high', modulation_rate_integer)
f_fine_fit_off = np.array(
[r.f_0 for r in fit_sweep_data(fine_sweep_off)])
print("Source off: fine - coarse [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * diff)
for diff in f_fine_fit_off - f_coarse_fit_off
]))
# At the lowest readout power, record a coarse sweep with the source on and a modulated stream at the fit
# source-on resonances.
sweeps.prepare_sweep(roach, f_initial_on, f_coarse_offset,
n_coarse_samples)
coarse_sweep_on, stream_mod_on = mmw_source_sweep_and_stream(
df, roach, lockin, modulated_stream_time, False, f_mmw_source,
'low', modulation_rate_integer, modulation_rate_integer)
f_coarse_fit_on = np.array(
[r.f_0 for r in fit_sweep_data(coarse_sweep_on)])
print("Source on: coarse - initial [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * diff)
for diff in f_coarse_fit_on - f_initial_on
]))
# Use these frequencies for all subsequent sweeps, and add an additional waveform for each stream.
print("\nSetting fine sweep frequencies for source-on measurements.")
sweeps.prepare_sweep(roach, f_coarse_fit_on, f_fine_offset,
n_fine_samples)
for k, attenuation in enumerate(attenuations):
print(
"\nSource-on measurement {} of {}: DAC attenuator at {:.1f} dB."
.format(k + 1, len(attenuations), attenuation))
roach.set_dac_attenuator(attenuation)
fine_sweep_on, stream = mmw_source_sweep_and_stream(
df,
roach,
lockin,
long_stream_time,
k > 0, # overwrite after the first.
f_mmw_source,
'low',
'low',
modulation_rate_integer)
f_fine_fit_on = [r.f_0 for r in fit_sweep_data(fine_sweep_on)]
print("Source on: fine - coarse [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * diff)
for diff in f_fine_fit_on - f_coarse_fit_on
]))
df.close()
print("Completed in {:.0f} minutes: {}".format(
(time.time() - start_time) / 60, df.filename))
# Clean up.
if f_mmw_source:
hittite.off()
hittite.disconnect()
def sweeps_and_streams(f_initial,
attenuations,
suffix='',
coarse_exponent=19,
fine_exponent=21,
long_stream_time=30,
short_stream_time=4,
roach_wait=10):
roach = baseband.RoachBaseband()
f_modulation = roach.set_modulation_output('high')
n_coarse_samples = 2**coarse_exponent
n_fine_samples = 2**fine_exponent
coarse_frequency_resolution = roach.fs / n_coarse_samples
fine_frequency_resolution = roach.fs / n_fine_samples
coarse_offset_integers = offset_integers[coarse_exponent]
fine_offset_integers = offset_integers[fine_exponent]
f_coarse_offset = coarse_frequency_resolution * coarse_offset_integers
f_fine_offset = fine_frequency_resolution * fine_offset_integers
start_time = time.time()
df = data_file.DataFile(suffix=suffix)
maximum_attenuation = max(attenuations)
print(
"Setting DAC attenuator to maximum requested attenuation of {:.1f} dB."
.format(maximum_attenuation))
roach.set_dac_attenuator(maximum_attenuation)
# At the lowest readout power, record a coarse sweep and a short stream
sweeps.prepare_sweep(roach, f_initial, f_coarse_offset, n_coarse_samples)
df.log_hw_state(roach)
coarse_sweep_data = sweeps.do_prepared_sweep(
roach, nchan_per_step=roach.tone_bins.shape[0], reads_per_step=2)
df.add_sweep(coarse_sweep_data)
df.sync()
coarse_f_fit = np.array([r.f_0 for r in fit_sweep_data(coarse_sweep_data)])
print("coarse - initial [Hz]: " + ', '.join(
['{:.0f}'.format(1e6 * diff) for diff in coarse_f_fit - f_initial]))
roach.add_tone_freqs(coarse_f_fit, overwrite_last=True)
roach.select_bank(roach.fft_bins.shape[0] - 1)
roach._sync()
time.sleep(
roach_wait
) # The above commands somehow create a transient that takes about 5 seconds to decay.
df.log_hw_state(roach)
stream_start_time = time.time()
stream, addresses = roach.get_data_seconds(short_stream_time, pow2=True)
df.add_timestream_data(stream,
roach,
stream_start_time,
mmw_source_modulation_freq=f_modulation)
df.sync()
# Use these frequencies for all subsequent sweeps, and add an additional waveform for each stream.
print("\nSetting fine sweep frequencies.")
sweeps.prepare_sweep(roach, coarse_f_fit, f_fine_offset, n_fine_samples)
for k, attenuation in enumerate(attenuations):
print("\nMeasurement {} of {}: DAC attenuator at {:.1f} dB.".format(
k + 1, len(attenuations), attenuation))
roach.set_dac_attenuator(attenuation)
fine_sweep_data = sweeps.do_prepared_sweep(
roach, nchan_per_step=roach.tone_bins.shape[0], reads_per_step=2)
df.add_sweep(fine_sweep_data)
df.sync()
fine_f_fit = np.array([r.f_0 for r in fit_sweep_data(fine_sweep_data)])
print("fine - coarse [Hz]: " + ', '.join([
'{:.0f}'.format(1e6 * diff) for diff in fine_f_fit - coarse_f_fit
]))
f_stream = roach.add_tone_freqs(
coarse_f_fit, overwrite_last=k > 0) # Overwrite after the first
print("stream detuning [ppm]: " + ', '.join(
['{:.0f}'.format(1e6 * x) for x in (f_stream / fine_f_fit - 1)]))
roach.select_bank(roach.fft_bins.shape[0] - 1)
roach._sync()
time.sleep(
roach_wait
) # The above commands somehow create a transient that takes about 5 seconds to decay.
df.log_hw_state(roach)
stream_start_time = time.time()
stream, addresses = roach.get_data_seconds(long_stream_time, pow2=True)
df.add_timestream_data(stream,
roach,
stream_start_time,
mmw_source_modulation_freq=f_modulation)
df.sync()
df.close()
print("Completed in {:.0f} minutes: {}".format(
(time.time() - start_time) / 60, df.filename))
while True:
temp = get_all_temperature_data()[1][-1]
print "mk stage at", temp
if temp > 0.348:
break
time.sleep(300)
time.sleep(600)
start = time.time()
use_fmin = False
attenlist = [39]
for atten in attenlist:
hittite.off()
print "setting attenuator to",atten
ri.set_dac_attenuator(atten)
measured_freqs = sweeps.prepare_sweep(ri,f0binned,offsets,nsamp=nsamp)
print "loaded waveforms in", (time.time()-start),"seconds"
sweep_data = sweeps.do_prepared_sweep(ri, nchan_per_step=atonce, reads_per_step=4)
orig_sweep_data = sweep_data
meas_cfs = []
idxs = []
delays = []
for m in range(len(f0s)):
fr,s21,errors = sweep_data.select_by_freq(f0s[m])
thiscf = f0s[m]
res = fit_best_resonator(fr[1:-1],s21[1:-1],errors=errors[1:-1]) #Resonator(fr,s21,errors=errors)
delay = res.delay
delays.append(delay)
s21 = s21*np.exp(2j*np.pi*res.delay*fr)
res = fit_best_resonator(fr,s21,errors=errors)
def sweeps_and_streams(f_initial, attenuations, suffix='', coarse_exponent=19, fine_exponent=21, long_stream_time=30,
short_stream_time=4, roach_wait=10):
roach = baseband.RoachBaseband()
f_modulation = roach.set_modulation_output('high')
n_coarse_samples = 2 ** coarse_exponent
n_fine_samples = 2 ** fine_exponent
coarse_frequency_resolution = roach.fs / n_coarse_samples
fine_frequency_resolution = roach.fs / n_fine_samples
coarse_offset_integers = offset_integers[coarse_exponent]
fine_offset_integers = offset_integers[fine_exponent]
f_coarse_offset = coarse_frequency_resolution * coarse_offset_integers
f_fine_offset = fine_frequency_resolution * fine_offset_integers
start_time = time.time()
df = data_file.DataFile(suffix=suffix)
maximum_attenuation = max(attenuations)
print("Setting DAC attenuator to maximum requested attenuation of {:.1f} dB.".format(maximum_attenuation))
roach.set_dac_attenuator(maximum_attenuation)
# At the lowest readout power, record a coarse sweep and a short stream
sweeps.prepare_sweep(roach, f_initial, f_coarse_offset, n_coarse_samples)
df.log_hw_state(roach)
coarse_sweep_data = sweeps.do_prepared_sweep(roach, nchan_per_step=roach.tone_bins.shape[0], reads_per_step=2)
df.add_sweep(coarse_sweep_data)
df.sync()
coarse_f_fit = np.array([r.f_0 for r in fit_sweep_data(coarse_sweep_data)])
print("coarse - initial [Hz]: " + ', '.join(['{:.0f}'.format(1e6 * diff) for diff in coarse_f_fit - f_initial]))
roach.add_tone_freqs(coarse_f_fit, overwrite_last=True)
roach.select_bank(roach.fft_bins.shape[0] - 1)
roach._sync()
time.sleep(roach_wait) # The above commands somehow create a transient that takes about 5 seconds to decay.
df.log_hw_state(roach)
stream_start_time = time.time()
stream, addresses = roach.get_data_seconds(short_stream_time, pow2=True)
df.add_timestream_data(stream, roach, stream_start_time, mmw_source_modulation_freq=f_modulation)
df.sync()
# Use these frequencies for all subsequent sweeps, and add an additional waveform for each stream.
print("\nSetting fine sweep frequencies.")
sweeps.prepare_sweep(roach, coarse_f_fit, f_fine_offset, n_fine_samples)
for k, attenuation in enumerate(attenuations):
print("\nMeasurement {} of {}: DAC attenuator at {:.1f} dB.".format(k + 1, len(attenuations), attenuation))
roach.set_dac_attenuator(attenuation)
fine_sweep_data = sweeps.do_prepared_sweep(roach, nchan_per_step=roach.tone_bins.shape[0], reads_per_step=2)
df.add_sweep(fine_sweep_data)
df.sync()
fine_f_fit = np.array([r.f_0 for r in fit_sweep_data(fine_sweep_data)])
print("fine - coarse [Hz]: " + ', '.join(['{:.0f}'.format(1e6 * diff) for diff in fine_f_fit - coarse_f_fit]))
f_stream = roach.add_tone_freqs(coarse_f_fit, overwrite_last=k>0) # Overwrite after the first
print("stream detuning [ppm]: " + ', '.join(['{:.0f}'.format(1e6 * x) for x in (f_stream / fine_f_fit - 1)]))
roach.select_bank(roach.fft_bins.shape[0] - 1)
roach._sync()
time.sleep(roach_wait) # The above commands somehow create a transient that takes about 5 seconds to decay.
df.log_hw_state(roach)
stream_start_time = time.time()
stream, addresses = roach.get_data_seconds(long_stream_time, pow2=True)
df.add_timestream_data(stream, roach, stream_start_time, mmw_source_modulation_freq=f_modulation)
df.sync()
df.close()
print("Completed in {:.0f} minutes: {}".format((time.time() - start_time) / 60, df.filename))
def sweep_fit_timestream(roach, center_frequencies, offset_frequencies, sweep_n_samples, timestream_n_samples,
attenuation, suffix,
time_in_seconds, interactive=False, coarse_multiplier=3):
df = data_file.DataFile(suffix=suffix)
print("Writing data to " + df.filename)
print("Setting DAC attenuator to {:.1f} dB".format(attenuation))
roach.set_dac_attenuator(attenuation)
print("Sweep memory usage is {:.1f} MB of {:.1f} MB capacity.".format(
memory_usage_bytes(offset_frequencies.shape[0], sweep_n_samples) / 2 ** 20, EFFECTIVE_DRAM_CAPACITY / 2 ** 20))
# Do a preliminary sweep to make sure the main sweeps are centered properly.
sweeps.prepare_sweep(roach, center_frequencies, coarse_multiplier * offset_frequencies, sweep_n_samples)
roach._sync()
time.sleep(0.2)
if interactive:
raw_input("Hit enter to record preliminary frequency sweep.")
else:
print("Recording preliminary frequency sweep.")
coarse_sweep_data = sweeps.do_prepared_sweep(roach, nchan_per_step=center_frequencies.size, reads_per_step=8)
coarse_resonators = fit_sweep_data(coarse_sweep_data)
coarse_f0s = np.array([r.f_0 for r in coarse_resonators])
fine_center_frequencies = round_frequencies(coarse_f0s, roach.fs, sweep_n_samples)
# Now do the actual sweep and save it.
sweeps.prepare_sweep(roach, fine_center_frequencies, offset_frequencies, sweep_n_samples)
roach._sync()
time.sleep(0.2)
df.log_hw_state(roach)
if interactive:
raw_input("Hit enter to begin recording frequency sweep.")
else:
print("Recording frequency sweep.")
sweep_start_time = time.time()
sweep_data = sweeps.do_prepared_sweep(roach, nchan_per_step=center_frequencies.size, reads_per_step=8)
print("Elapsed time {:.0f} seconds. Writing to disk.".format(time.time() - sweep_start_time))
df.add_sweep(sweep_data)
df.sync()
resonators = fit_sweep_data(sweep_data)
fine_f0s = np.array([r.f_0 for r in resonators])
print("Initial frequencies in MHz are " + ', '.join(['{:.3f}'.format(f0) for f0 in center_frequencies]))
print("initial - fit [Hz]: " +
', '.join(['{:.0f}'.format(1e6 * delta_f) for delta_f in center_frequencies - fine_f0s]))
timestream_measured_frequencies = roach.set_tone_frequencies(fine_f0s, nsamp=timestream_n_samples)
roach.select_fft_bins(np.arange(roach.tone_bins.shape[1]))
roach._sync()
time.sleep(0.2)
df.log_hw_state(roach)
print("measured - fit [Hz]: " +
', '.join(['{:.0f}'.format(1e6 * delta_f) for delta_f in timestream_measured_frequencies - fine_f0s]))
# This delay was added because the above lines cause some kind of transient signal that takes about three seconds
# to decay. This was showing up at the beginning of the timestreams with interactive=False.
minimum_wait = 5
wait_start_time = time.time()
if interactive:
raw_input("Hit enter to begin recording {:.0f} second timestream.".format(time_in_seconds))
else:
print("Recording {:.0f} second timestream.".format(time_in_seconds))
while time.time() - wait_start_time < minimum_wait:
time.sleep(0.1)
timestream_start_time = time.time()
data, address = roach.get_data_seconds(time_in_seconds, demod=True, pow2=True)
print("Elapsed time {:.0f} seconds. Writing to disk.".format(time.time() - timestream_start_time))
df.add_timestream_data(data, roach, timestream_start_time)
df.sync()
df.nc.close()
return df.filename
def mmw_source_power_step(f_initial_off, f_initial_on, attenuations, f_mmw_source=0, suffix="mmw", hittite_power=0,
long_stream_time=30,
modulated_stream_time=4, coarse_exponent=19, fine_exponent=21, modulation_rate_integer=7):
if f_mmw_source:
from kid_readout.equipment import hittite_controller
frequency_multiplication_factor = 12
hittite = hittite_controller.hittiteController()
hittite.set_power(hittite_power) # in dBm
hittite.set_freq(f_mmw_source / frequency_multiplication_factor) # in Hz
hittite.on()
lockin = lockin_controller.lockinController()
print(lockin.get_idn())
roach = baseband.RoachBaseband()
n_coarse_samples = 2 ** coarse_exponent
n_fine_samples = 2 ** fine_exponent
coarse_frequency_resolution = roach.fs / n_coarse_samples
fine_frequency_resolution = roach.fs / n_fine_samples
coarse_offset_integers = offset_integers[coarse_exponent]
fine_offset_integers = offset_integers[fine_exponent]
f_coarse_offset = coarse_frequency_resolution * coarse_offset_integers
f_fine_offset = fine_frequency_resolution * fine_offset_integers
while True:
f_source_modulation = roach.set_modulation_output(modulation_rate_integer)
print("\nSet source modulation frequency to {:.1f} Hz. Check the lock-in.".format(f_source_modulation))
try:
mmw_attenuator_turns = float(
raw_input("Enter the value to which both attenuators are set, or hit Enter to stop recording data: "))
except ValueError:
break
start_time = time.time()
df = data_file.DataFile(suffix=suffix)
df.nc.mmw_atten_turns = (mmw_attenuator_turns, mmw_attenuator_turns)
maximum_attenuation = max(attenuations)
print("Setting DAC attenuator to maximum requested attenuation of {:.1f} dB.".format(maximum_attenuation))
roach.set_dac_attenuator(maximum_attenuation)
# At the lowest readout power, record a coarse sweep with the source off and a modulated stream at the fit
# source-off resonances.
sweeps.prepare_sweep(roach, f_initial_off, f_coarse_offset, n_coarse_samples)
coarse_sweep_off, stream_mod_off = mmw_source_sweep_and_stream(df, roach, lockin, modulated_stream_time,
False,
f_mmw_source, 'high',
modulation_rate_integer,
modulation_rate_integer)
f_coarse_fit_off = np.array([r.f_0 for r in fit_sweep_data(coarse_sweep_off)])
print("Source off: coarse - initial [Hz]: " + ', '.join(['{:.0f}'.format(1e6 * diff)
for diff in f_coarse_fit_off - f_initial_off]))
# At the lowest readout power, record a fine sweep and long stream with the source off.
sweeps.prepare_sweep(roach, f_coarse_fit_off, f_fine_offset, n_fine_samples)
fine_sweep_off, stream_off = mmw_source_sweep_and_stream(df, roach, lockin, long_stream_time, False,
f_mmw_source, 'high', 'high',
modulation_rate_integer)
f_fine_fit_off = np.array([r.f_0 for r in fit_sweep_data(fine_sweep_off)])
print("Source off: fine - coarse [Hz]: " + ', '.join(['{:.0f}'.format(1e6 * diff)
for diff in f_fine_fit_off - f_coarse_fit_off]))
# At the lowest readout power, record a coarse sweep with the source on and a modulated stream at the fit
# source-on resonances.
sweeps.prepare_sweep(roach, f_initial_on, f_coarse_offset, n_coarse_samples)
coarse_sweep_on, stream_mod_on = mmw_source_sweep_and_stream(df, roach, lockin, modulated_stream_time,
False,
f_mmw_source,
'low', modulation_rate_integer,
modulation_rate_integer)
f_coarse_fit_on = np.array([r.f_0 for r in fit_sweep_data(coarse_sweep_on)])
print("Source on: coarse - initial [Hz]: " + ', '.join(['{:.0f}'.format(1e6 * diff)
for diff in f_coarse_fit_on - f_initial_on]))
# Use these frequencies for all subsequent sweeps, and add an additional waveform for each stream.
print("\nSetting fine sweep frequencies for source-on measurements.")
sweeps.prepare_sweep(roach, f_coarse_fit_on, f_fine_offset, n_fine_samples)
for k, attenuation in enumerate(attenuations):
print("\nSource-on measurement {} of {}: DAC attenuator at {:.1f} dB.".format(k + 1, len(attenuations),
attenuation))
roach.set_dac_attenuator(attenuation)
fine_sweep_on, stream = mmw_source_sweep_and_stream(df, roach, lockin, long_stream_time,
k > 0, # overwrite after the first.
f_mmw_source, 'low', 'low',
modulation_rate_integer)
f_fine_fit_on = [r.f_0 for r in fit_sweep_data(fine_sweep_on)]
print("Source on: fine - coarse [Hz]: " + ', '.join(['{:.0f}'.format(1e6 * diff)
for diff in f_fine_fit_on - f_coarse_fit_on]))
df.close()
print("Completed in {:.0f} minutes: {}".format((time.time() - start_time) / 60, df.filename))
# Clean up.
if f_mmw_source:
hittite.off()
hittite.disconnect()