Model 914-X Series Modular Multiplexer System User Manual
Focal Technologies Corporation
Page 10-6
A Moog Inc. Company
Document Number: 914-0601-00
Rev.
5.0
The 914-X Series system has singlemode SFP transceivers installed and therefore all components in the fiber
link should also be singlemode, typically Corning SMF-28 (9/125 µm) or equivalent. A single mismatched
jumper in the system may cause intermittent or persistent optical link errors. Do not rely on cable jacket or
connector colors alone to determine the type of optical fiber.
3. Use clean connectors
It is critical to ensure all fiber connectors are clean and free of dirt and debris. Even a small amount of dirt or
fluid contaminant may degrade link performance, and most reported optical link problems are due simply to
poor or contaminated optical connections.
Keep protective dust covers on fiber connectors and bushings when not in use.
Do not touch the white ceramic ferrules of the connectors with bare hands or objects, other than
cleaning materials.
Prior to making a fiber connection, clean the barrel and tip of the ferrule using a suitable solvent, such
as reagent grade isopropyl alcohol, and a lint free optics cleaning tissue, such as
Kimwipes
®
EX-L
.
Carefully dab any dirt or debris off the face of the ceramic ferrules. Excessive dirt may need to be
cleared with pressurized air from a can prior to wiping the ferrule to avoid scratching the fiber itself.
Do not used air from a compressor as it may be contaminated with oil.
During mating or unmating of fiber connectors with bushings, keep the connector aligned as straight
as possible. Avoid side loading the ceramic ferrule, which can crack the internal alignment sleeve in
the bushing.
It is recommended that each fiber connector is inspected with a handheld fiber microscope prior to
final assembly to ensure there are no scratches, pits, debris, or fluid contamination on the fiber face.
NEVER
look into the end of a fiber when it is plugged into a transceiver or active
fiber, especially when using a magnifying instrument, such as a fiber microscope.
Figure 10-6 shows an LC connector which is a small form-factor fiber optic connector that uses a 1.25 mm
ferrule and incorporates a push-and-latch design similar to an RJ-45 connector.
Error! Reference source not f
ound.
shows an ST fiber optic connector that uses a 2.5 mm ferrule. The ST connector is latched into place
by twisting to engage a spring-loaded bayonet socket.
Figure 10-6: LC connector
Figure 10-7: ST connector
4. Maintain good optical connections
SFP optical transceivers typically have a transmit and receive optical bushing (LC type), which requires dual
fiber operation. The transmit side (Tx) and the receiver side (Rx) of a dual LC port SFP is shown in the figure
below.
Ferrule
Ferrule
