  We present first results of a new instrument, the Generalized Differential
Image Motion Monitor (GDIMM), aiming at monitoring parameters of the optical
turbulence (seeing, isoplanatic angle, coherence time and outer scale). GDIMM
is based on a small telescope equipped with a 3-holes mask at its entrance
pupil. The seeing is measured by the classical DIMM technique using two
sub-pupils of the mask (6 cm diameter separated by a distance of 20 cm), the
isoplanatic angle is estimated from scintillation through the third sub-pupil
(its diameter is 10 cm, with a central obstruction of 4 cm). The coherence time
is deduced from the temporal structure function of the angle of arrival (AA)
fluctuations, thanks to the high-speed sampling rate of the camera. And the
difference of the motion variances from sub-apertures of different diameters
makes it possible to estimate the outer scale. GDIMM is a compact and portable
instrument, and can be remotely controlled by an operator. We show in this
paper the first results of test campaigns obtained in 2013 and 2014 at Nice
observatory and the Plateau de Calern (France). Comparison with simultaneous
data obtained with the Generalized Seeing Monitor (GSM) are also presented.
