  Let $(G, H)$ be a symmetric pair for a real semisimple Lie group $G$ and $(G,
H_0)$ its associated pair. For each irreducible square integrable
representation $\pi$ of $G$ so that its restriction to $H$ is admissible, we
find an irreducible square integrable representation $\pi_0$ of $H_0$ which
allows to compute the Harish-Chandra parameter of each irreducible
$H-$subrepresentation of $\pi$ as well as its multiplicity. The computation is
based on the spectral analysis of the restriction of $\pi_0$ to a maximal
compact subgroup of $H_0.$
