def state(self):
"""return state for testing."""
from obspy.core.util import AttribDict
out = AttribDict()
# path to test files
# self.path =
# general constants
tmax = 6.
out.dt = 0.01
npts = int(tmax / out.dt + 1)
t = np.linspace(0., tmax, npts)
out.fmin = .5
out.fmax = 10
# constants for the signal
a1 = 4.
t1 = 2.
f1 = 2.
phi1 = 0.
# amplitude and phase error
phase_shift = 0.1
amp_fac = 1.2
# generate the signal
h1 = (np.sign(t - t1) + 1) / 2
out.st1 = a1 * (t - t1) * np.exp(-2 * (t - t1))
out.st1 *= np.cos(2. * np.pi * f1 * (t - t1) + phi1 * np.pi) * h1
# reference signal
out.st2 = out.st1.copy()
# generate analytical signal (hilbert transform) and add phase shift
out.st1p = hilbert(out.st1)
out.st1p = np.real(
np.abs(out.st1p) * np.exp(
(np.angle(out.st1p) + phase_shift * np.pi) * 1j))
# signal with amplitude error
out.st1p /= amp_fac
return out
