Using Mandrels For Testing Multimode Fiber - Fluke OF-500 OptiFiber User Manual

OF-500 OptiFiber Certifying OTDR
Users Manual

Using Mandrels for Testing Multimode Fiber

You should use mandrels when testing multimode fiber.
Mandrels can improve measurement repeatability and
consistency. They also allow the use of LED light sources to
certify 50 µm and 62.5 µm fiber links for current and planned
high bit-rate applications, such as Gigabit Ethernet and 10
Gigabit Ethernet.
The gray mandrels included with some OptiFiber models are
compliant with TIA-568-C for 62.5 µm fiber with a 3 mm
jacket.
64
Mandrels for 50 µm fiber are available from Fluke Networks.
Refer to the appropriate standard for mandrel requirements
if you follow other standards. The OF-500 Technical
Reference Handbook provides a partial list of mandrel
requirements for TIA standards.
Figure 26 shows how to wrap the fiber around a mandrel.
Place mandrels on the tester's output fibers, as shown in
Figures 28 through 35.
In the reference and test connection diagrams shown on the
tester, mandrels are indicated by a loop in the fiber.