Fluke Networks CertiFiber Pro Users Manual - Manual (Page 303)

281
Chapter 10: The FiberInspector Test
The optional DI-1000 video probe connects to the type A USB port
on the Versiv main unit to let you inspect the endfaces in fiber
optic connectors. The probe lets you see dirt, scratches, and other
defects that can cause unsatisfactory performance or failures in
fiber optic networks.