In addition to the strip data, CST events contain 8 monitoring signals per FADC that are generated on the hybrid (commonly known as ``Specials'').
After the data of the two halfladders connected to one FADC have been processed, 8 Special words are eventually appended to the Hit Buffer (Format see Sec. 2.1.1). This happens only every other event and is indicated by bit 26 of the CST Data Header word.