Strange phase error

[Iain Day]

Hello,

I've just been starting to use SpinEvolution, and starting with
something simple. I'm trying a pulse-acquire spectrum but I don't get
nice result, I get something with a strange phase error. The following
link shows the result:

http://www.sussex.ac.uk/Users/ijd22/spinev_error.png

The sequence is below. Any ideas if I'm doing something wrong?

Thanks,

Iain

****** The System *******
spectrometer(MHz) 600
spinning_freq(kHz) *
channels C13
nuclei C13
atomic_coords *
cs_isotropic 180 ppm
csa_parameters *
j_coupling *
quadrupole *
dip_switchboard *
csa_switchboard *
exchange_nuclei *
bond_len_nuclei *
bond_ang_nuclei *
tors_ang_nuclei *
groups_nuclei *
******* Pulse Sequence ******************************
CHN 1
timing(usec) 5 (25)16384
power(kHz) 50 0
phase(deg) 0 0
freq_offs(kHz) 0 0
******* Variables ***********************************
ppm_ref_offs_1=10.0
******* Options *************************************
rho0 F1z
observables F1p
EulerAngles *
n_gamma *
line_broaden(Hz) *
zerofill *
FFT_dimensions 1 ppm
options -re
******************************************************

[Mikhail Veshtort]

Hi Iain,

This is not an error. You just don't have any line broadening in your
simulation and so you should not expect a Lorentzian, or any "phased"
line shape in your spectrum.

Mikhail