def speed_test(host, n_pts=1000):
time_array = np.zeros(n_pts)
client = load_instrument(host, instrument='oscillo')
driver = Oscillo(client)
driver.set_averaging(False)
t0 = time.time()
t_prev = t0
for i in range(n_pts):
if cmd == 'get_adc':
driver.get_adc()
elif cmd == 'get_num_average':
driver.get_num_average()
t = time.time()
time_array[i] = t - t_prev
print host, i, time_array[i]
t_prev = t
print np.median(time_array)
plt.plot(time_array)
driver.close()
def speed_test(host, n_pts=1000):
time_array = np.zeros(n_pts)
client = load_instrument(host, instrument='oscillo')
driver = Oscillo(client)
driver.set_averaging(False)
t0 = time.time()
t_prev = t0
for i in range(n_pts):
if cmd == 'get_adc':
driver.get_adc()
elif cmd == 'get_num_average':
driver.get_num_average()
t = time.time()
time_array[i] = t - t_prev
print host, i, time_array[i]
t_prev = t
print np.median(time_array)
plt.plot(time_array)
driver.close()
time_total = np.zeros((n_pts, n_methods))
for j, method in enumerate(methods):
t0 = time.time()
t_prev = t0
print j
for i in range(n_pts):
driver.get_adc(method)
print i
t = time.time()
time_total[i,j] = t - t_prev
t_prev = t
return time_total
host = os.getenv('HOST','192.168.1.100')
client = load_instrument(host, instrument='oscillo')
driver = SpeedTest(client)
methods = ('read_zeros',
'read_rambuf',
'read_rambuf_memcpy',
'read_rambuf_mycopy',
'read_mmapbuf_nocopy',
'read_rambuf_mmap_memcpy')
lineObjects = plt.plot(read(driver, methods, n_pts=1000))
plt.legend(iter(lineObjects), methods)
plt.ylabel('Time (s)')
plt.show()
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import initExample
import os
import time
import numpy as np
import matplotlib.pyplot as plt
from utilities import load_instrument
from ldk.drivers import Oscillo
host = os.getenv('HOST','192.168.1.100')
client = load_instrument(host, instrument='oscillo')
driver = Oscillo(client)
# Enable laser
driver.start_laser()
# Set laser current
current = 30 # mA
driver.set_laser_current(current)
# Modulation on DAC
amp_mod = 0.2
freq_mod = 1e6
driver.dac[1, :] = amp_mod*np.sin(2 * np.pi * freq_mod * driver.sampling.t)
driver.set_dac()
# Signal on ADC
driver.get_adc()
# -*- coding: utf-8 -*-
import initExample
import os
import time
import numpy as np
import matplotlib
matplotlib.use('GTKAgg')
from matplotlib import pyplot as plt
from utilities import load_instrument
from ldk.drivers import Spectrum
# Load the spectrum instrument
host = os.getenv('HOST','192.168.1.100')
client = load_instrument(host, instrument='spectrum')
driver = Spectrum(client)
# Enable laser
driver.start_laser()
# Set laser current
current = 30 # mA
driver.set_laser_current(current)
# Plot parameters
fig = plt.figure()
ax = fig.add_subplot(111)
x = 1e-6 * np.fft.fftshift(driver.sampling.f_fft)
y = 10*np.log10(np.fft.fftshift(driver.spectrum))
li, = ax.plot(x, y)