  Intrinsic tunneling spectroscopy in high magnetic field ($H$) is used for a
direct test of superconducting features in a quasiparticle density of states of
high-$T_c$ superconductors. We were able to distinguish with a great clarity
two co-existing gaps: (i) the superconducting gap, which closes as $H \to
H_{c2}(T)$ and $T\to T_c(H)$, and (ii) the $c$-axis pseudo-gap, which does not
change neither with $H$, nor $T$. Strikingly different magnetic field
dependencies, together with previously observed different temperature
dependencies of the two gaps ~\cite{Krasnov}, speak against the superconducting
origin of the pseudo-gap.
