A multicapillary bundle for use in a gas chromatograph. During self test operation a duplicate clock enable signal DPCLKTESTEN is used to enable one of these clock signals CLKA, CLKB to be used as a shared clock signal by all data access paths A, B. The energy beam is irradiated to the first bonding material through the first plate structure to bond the first plate structure and the frame. The bank of odd bit lines is discharged just prior to a selection of the bank of even bit lines for reading and vice-versa.