def set_pulses(self):
### Excitation Pulse ###
exdata = self.power * pulse_shape.hard_pulse(self.p90, self.samp_rate)
#sinc Excitation Pulse
#amp = self.power
#exdata = pulse_shape.wsinc(self.p90,7.0,0,self.samp_rate)*amp
# Set data for triggered vector source named "ex_pulse"
tb.ex_pulse.set_data(exdata)
# Set pulse delay in flowgraph
start = int(self.fudge * self.samp_rate)
tb.set_ex_delay(start)
pulses.ex = pulse(exdata, start)
### Readout Window ###
readdata = 1.0 * pulse_shape.hard_pulse(self.readout_length,
self.samp_rate)
# Set data for triggered vector source named "readwin"
tb.readwin.set_data(readdata)
start = int(
self.samp_rate *
(self.fudge + self.p90 + self.dead_time)) # define pulse timing
tb.set_readout_delay(start) # update flow graph
pulses.readout = pulse(readdata, start)
def readout_pulse(self):
# Readout Window
self.readout_length = round(float(self.samp_rate) / self.BW * self.SI)
self.readout_time = self.readout_length / self.samp_rate
data = pulse_shape.hard_pulse(self.readout_time, self.samp_rate)
tb.readwin.set_data(data) # update pulse in flowgraph
start = int(self.samp_rate * (self.fudge + self.p90 / 2 + self.TE -
(self.readout_time / 2)))
tb.set_readout_delay(start) # update pulse delay
pulses.readout = pulse(data, start)
def p180_hard_pulse(self):
# Refocusing Pulse
amp = 2 * self.power_auc / self.p180
data = amp * pulse_shape.hard_pulse(self.p180, self.samp_rate)
tb.ref_pulse.set_data(data) # update pulse in flowgraph
# update pulse delay
start = int(self.samp_rate *
(self.fudge + self.p90 / 2 + self.TE / 2 - self.p180 / 2))
tb.set_ref_delay(start)
pulses.ref = pulse(data, start)
def p90_hard_pulse(self):
# Excitation Pulse
amp = self.power_auc * self.samp_rate #self.power_auc/self.p90
foo = pulse_shape.hard_pulse(self.p90, self.samp_rate)
data = foo / sum(foo) * amp
tb.ex_pulse.set_data(data)
start = int(self.fudge * self.samp_rate) # update pulse in flowgraph
pulses.ex = pulse(data, start)
tb.set_ex_delay(start) # update pulse delay
if (self.ischopped == 1):
tb.ex_pulse.set_amps(1, -2, 2, self.nav)
else:
tb.ex_pulse.set_amps(1, 0, 1, 1)