User`s guide

Getting Started with Optical Heads What is an Optical Head?
14 Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
Figure 3 shows two types of adapter that are available for connecting the
input fiber to an optical head
.
Figure 3 Connector adapters
Threaded connector adaptor:
81000xA, 81000BT
D-type magnetic connector adaptor:
(preferred)
81003xx
81001xx
81000BC