dvb3

[luca72]

hello i try to use the python-dvb3 bindings, but i have some problem:
fe = dvb3.frontend.Frontend(0)
type = tipo_1 = fe.get_dvbtype()
now i need to set the parameters
parametri = dvb3.frontend.QPSKParameters(frequency=frequency,
inversion=2 , symbol_rate=27500,  fec_inner=9)
but when i use
fe.set_frontend(parametri)
i get the error
The debugged program raised the exception IOError
"(22, 'Invalid argument')"
File: frontend.pyx, Line: 364

thedef is as follow :
 def set_frontend(self, parameters):
        global cfrontend
        cdef cfrontend.dvb_frontend_parameters p
        if pack_parameters(&p, parameters) == 0:
            raise ParameterError, "Incorrect parameter type"
        if ioctl(self.fd, cfrontend.FE_SET_FRONTEND, &p) == -1:
            raise_ioerror()

can you hel me

Luca