Grass Valley 8939FCA - Manual (Page 16)

16 8939FCA/FCB — Instruction Manual
8939FCA and 8939FCB Applications
8939FCA and 8939FCB Applications
Before using the 8939FCA and/or the 8939FCB, it is useful to understand
some basic configurations that utilize the full capabilities of the CWDM
fiber module series. The 8939FCA/FCB passive modules are excellent for
the following applications:
• Transporting multiple SD-SDI or HD-SDI video signals over a limited
fiber cable capacity.
• When reducing infrastructure costs (cabling, electrical power consump-
tion, space, etc.) is required – multiplexed video over fiber gives an 8:1
ratio on cabling and support equipment.
• Fiber transport is commonly used in any application where HD-SDI
signals are found.
The 8939FCA and 8939FCB can act as a multiplexer or demultiplexer or as
a combination of both due to the bi-directionality of the passive optic
device.
Note Refer to Attenuation Requirements on page 15 to determine if attenuation is
needed in your application depending on the length of cable run between
8939FCA or 8939FCB COM ports.
The following three CWDM configuration examples using the 8943CF and
8943FC modules (handling up to 3 Gb/s) are given in this manual:
• CWDM Configuration for 9 Channels ( page 17 )
• CWDM 16 Channel Configuration ( page 20 )
• Bi-Directional Application ( page 24 )
Note As mentioned earlier, this manual uses the 8943CF 4 Channel Electrical to
Fiber and 8943FC 4 Channel Fiber to Electrical Converter modules for exam-
ples throughout the manual as they handle a higher bit rate of 3 Gb/s. 8935CF
and 8935FC 4 Channel converter modules can also be used in the same con-
figuration and can handle bit rates up to 1.5 Gb/s. However, status reporting
for the 8935 modules may vary.