  We present the first quick look analysis of data from nine {\it AstroSat}'s
LAXPC observations of GRS 1915+105 during March 2016 when the source had the
characteristics of being in Radio-quiet $\chi$ class. We find that a simple
empirical model of a disk blackbody emission, with Comptonization and a broad
Gaussian Iron line can fit the time averaged 3--80 keV spectrum with a
systematic uncertainty of 1.5\% and a background flux uncertainty of 4\%. A
simple deadtime-corrected Poisson noise level spectrum matches well with the
observed high frequency power spectra till 50 kHz and as expected the data show
no significant high frequency ($> 20$ Hz) features. Energy dependent power
spectra reveal a strong low frequency (2 - 8 Hz) Quasi-periodic oscillation
(LFQPO) and its harmonic along with broad band noise. The QPO frequency changes
rapidly with flux (nearly 4 Hz in ~ 5 hours). With increasing QPO frequency, an
excess noise component appears significantly in the high energy regime (> 8
keV). At the QPO frequencies, the time-lag as a function of energy has a
non-monotonic behavior such that the lags decrease with energy till about 15
-20 keV and then increase for higher energies. These first look results
benchmark the performance of LAXPC at high energies and confirms that its data
can be used for more sophisticated analysis such as flux or frequency-resolved
spectro-timing studies.
