Library /sys$common/syshlp/ncphelp.hlb LOOP, CIRCUIT, WITH data-type  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Specifies the type of binary information to be sent during testing.
 If you omit this parameter, a combination of ones and zeros (MIXED) is
 sent. Three types of data can be sent:

                 MIXED
                 ONES
                 ZEROS