The Tektronix 11800 / CSA800 series are digital sampling scopes in the 11000 family, introduced in the late 1980s.
11801
11802
11803
CSA803
SD-14
SD-20
SD-22
SD-24
SD-26
SD-30
SD-32
SD-42
SD-43
SD-44
SD-46
SD-51
SD-Series sampling head extenders
067-1413-00
ORR-24