  The Deep Underground Neutrino Experiment (DUNE) is a leading experiment in
neutrino physics which is presently under construction. DUNE aims to measure
the yet unknown parameters in the three flavour oscillation scenario which
includes discovery of leptonic CP violation, determination of the mass
hierarchy and determination of the octant of $\theta_{23}$. Additionally, the
ancillary goals of DUNE include probing the sub-dominant effects induced by new
physics. A widely studied new physics scenario is that of nonstandard neutrino
interactions (NSI) in propagation which impacts the oscillations of neutrinos.
We consider some of the essential NSI parameters impacting the oscillation
signals at DUNE and explore the space of NSI parameters as well as study their
correlations among themselves and with the yet unknown CP violating phase,
$\delta$ appearing in the standard paradigm. The experiment utilizes a wide
band beam and provides us with a unique opportunity to utilize different beam
tunes at DUNE. We demonstrate that combining information from different beam
tunes (low energy, LE and medium energy, ME) available at DUNE impacts the
ability to probe some of these parameters and leads to altering the allowed
regions in two-dimensional space of parameters considered.
