  The heating-compensated interlayer tunneling spectroscopy is performed on
stacks of Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ intrinsic junctions. The high-accuracy
spectra without the local heating, for varying temperatures and magnetic
fields, reveal that the spectral weight forming the superconducting coherence
peak is mainly contributed from the dip position of the hump structure of the
pseudogap state. The observed U-shaped subgap structure is consistent with the
weighted antinodal tunneling between Cu-O double layers in a junction as
suggested in Ref. [17].
