MSD-402 User’s Guide
18
6.3.2 Twisted pair cable
When connecting twisted pair cables to the MSD, please observe the following precautions.
● Cat5e UTP/STP and Cat6 UTP/STP can be used, but we recommend CAT.5E HDC cable* for optimal
performance.
● We recommend connecting the FG connector to a ground source.
When using STP cables, the shielding feature can be optimized. The connected devices will be stable
using the grond 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 is the shorter one of the maximum extension distances of the connected
devices.
● Pin assignments: T568A or T568B straight
● 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.
● Do not tie the cable tightly; leave a space allowing the cable to move slightly.
● If you use the same cables, we recommended keeping a distance between the cables or not to place
the cables closely in parallel.
● 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 HDC, video or audio may be interrupted.
● If the total extension distance from the transmitter to receiver is 328.08 feet/100 m or less, up to shielded
RJ-45 coupler can be used. Cat6A (10GBase-T) is 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 6.2] Twisted pair cable extension distance
External noise
Category
Distance
TMDS clock
Memo
Affected
UTP
Cat5e
50 m/164.04 ft.
<= 225 MHz
IDK recommends Cat5e
STP, Cat6 UTP/STP, or
CAT.5E HDC cable* if the
extension distance exceeds
50 m/164.04 ft.
Cat6
100 m/328.08 ft.
Less affected
STP
Cat5e
*
Cat6
100 m/328.08 ft.
*CAT.5E HDC cable: dual-shield twisted pair cable which resists noise and protects video signals.
- Bandwidth: 500 MHz up to 328 ft./100 m
- HDBaseT Alliance verified the cable is recommended.
Note:
If there is a problem in the transmission path, video or audio may be interrupted. Check the precautions above.
If the problem still cannot be solved, shortening the twisted pair cable may remedy the problem.
