Grass Valley 8939FCA - Manual (Page 13)

8939FCA/FCB — Instruction Manual 13
Installation
Cabling
Note Before making any fiber optic cable mating connections and after every
de-mating cycle, use an industry standard fiber optic cleaning kit to clean the
fiber connectors and the connectorized fiber end faces. Refer to
Fiber Optic
Cleaning Requirement on page 11 .
Cabling is done on the rear fiber connections of the 8939FCA and 8939FCB
modules. Each module is bi-directional and can act as an multiplexer or
demultiplexer in any combination. For common usage applications for the
8939FCA or 8939FCB modules, refer to
8939FCA and 8939FCB Applications
on page 16 .
The modules only accept fiber inputs corresponding to the specific wave-
lengths labeled on the rear connectors. The fiber inputs can come from any
Grass Valley device that meets the specifications as described in
Specifica-
tions on page 28 .
CAUTION This is a Class Ilia laser device. Use caution when cabling as fiber optic lasers
are present. Follow standard fiber optic laser safety recommendations when
handling these modules.
8939FCA Modules
The currently shipping 8939FCA module backplane is shown in Figure 3
on page 14 with the CWDM frequencies labeled for each channel. Earlier
versions of the 8939FCA module shipped with the backplane shown in
Figure 4 on page 14 .
CAUTION Note that the COM and EXP ports in the older version do not have protective
coverings. Use caution when cabling as these are laser outputs.
The 8939FCA has eight fiber channels (CH 1 – CH 8), each handling a spe-
cific frequency as silkscreened on the module.
The COM port is the fiber link between other 8939FCA and 8939FCB mod-
ules. The single fiber connection can be up to 50 kilometers in length. Cable
lengths may require attenuation between COM ports in some instances.
Refer to
Attenuation Requirements on page 15 .
The EXP fiber port is used with devices with a 1310nm input or output. This
expansion port can accept or deliver an additional 1310nm wavelength
signal from GeckoFlex fiber-ready modules that are equipped with a fiber
optic SFP device.
Three different fiber optic receiver, transmitter, and transceiver SFP devices
can be installed on Grass Valley fiber-ready front modules to match the
required application.