FDX-08 User Guide
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6.2 Cabling
・
Read manuals for the external devices.
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Power all units off before connecting cables.
・
Be sure to fully seat all plugs and connections and dress cables to reduce stress on connectors.
6.2.1 Twisted pair cable for extension
To ensure the best performance of twisted pair cables, select a correct twisted pair cable and connect it
correctly.
・
Cat5e UTP/STP and Cat6 UTP/STP can be used, but we recommend CAT.5E HDC cable* for optimal
performance.
・
If using an STP cable, connect the FG connector to a ground source. Otherwise, the shielding feature
does not work correctly. When using a UTP cable, we still recommend using the ground connector.
・
The shielded STP cables are less affected by interference or external noise than UTP cables.
・
Connectors for long-haul extension are the same as that of eight-core modular connector used for
Ethernet, but the transmission system is not the same so that it cannot be connected to Ethernet.
・
The maximum extension distance of a twisted pair cables is the shorter distance of the maximum
extension distances of transmitter/receiver/sink device connected to the FDX.
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Pin assignments: T568A or T568B straight
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Do not pull the cable hard. The allowable tension of the twisted pair cable is 110 N.
・
Do not bend the connection cable at a sharp angle. Keep the bend radius four times of the cable diameter
or larger.
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Do not tie the cable tightly; leave a space allowing the cable to move slightly.
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If you use multiple twisted pair cables, we recommended keeping a distance between the cables or not to
place the cables closely in parallel.
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Keep the twisted pair cable as straight as you can. If you coil the cable, it is easily affected by noise.
・
Do not place the cable in an electrically noisy environment, since high-speed signals are transmitted.
Particularly when you use a high-output radio around the FDX, video or audio may be interrupted.
・
If the total extension distance from the transmitter to receiver is 328 ft. (100 m) or less, up to two cable
joints can be used. Products supporting Cat6A (10GBase-T) are recommended.
・
The table below shows supported extension distance for each twisted pair cable category. Note that the
distance may shorten depending on the actual environment.
[Table 6.1] Extension distance
Noise influence
Category
Extension
distance
TMDS clock
Recommended cable
Easily affected
UTP
Cat5e
164 ft. (50 m)
≦
225 MHz
For 164 ft. (50 m) or longer:
CAT.5E HDC
*
, Cat5e STP,
and Cat6 UTP/STP cables
Cat6
328 ft. (100 m)
Less affected
STP
Cat5e
*
Cat6
328 ft. (100 m)
*
The CAT.5E HDC cable is a double-shielded twisted pair cable that optimizes video signal transmission.
It is certified to 500 MHz bandwidth at distance up to 328 ft. (100 m) and verified to meet requirement
specified by HDBaseT Alliance. The double-shielded structure protects video signal from outside
interference.
