7
NOTICE
1. If the DVI or HDMI device requires the EDID information, please use EDID Reader/Writer to
retrieve and provide DVI or HDMI display EDID information.
2. All HDMI over Cat.X transmission distances are measured using Belden 1583A CAT5e
125MHz UTP cable and ASTRODESIGN Video Signal Generator.
3. The transmission length is largely affected by the type of Cat-5/5e/6 cables, the type of HDMI
sources, and the type of HDMI display. The testing result shows solid UTP cables (usually in
the form of 330m bulk cables) can transmit a lot longer signals than stranded UTP cables
(usually in the form of fixed length patch cords). Shielded STP cables are better suited than
unshielded UTP cables. A solid UTP Cat-5e cable shows longer transmission range than
stranded STP Cat-6 cable. For long extension applications, solid UTP/STP cables are the
only viable choice.
4. EIA/TIA-568-B termination (T568B) for category cables is recommended.
5. To reduce the interference among the unshielded twisted pairs of wires in Cat-5/5e/6 cable,
one can use double shielded STP cables to improve EMI problems, which is worsen in long
transmission.
6. Because the quality of the CAT5/6 cables has the major effect on how long the transmission
limit can achieve and how good is the received picture quality, the actual transmission range
is subject to one's choice of Cat-5/5e/6 cables. For desired resolutions greater than 1080i or
1280x1024, a Cat-6 cable is recommended.
7. If your HDMI display has multiple HDMI inputs, it is found that the first HDMI input [HDMI
input 1] generally can produce better transmission performance among all HDMI inputs.
Performance Guide for HDMI over Category Cable Transmission
Performance rating
Type of category cable
Wiring Shielding
CAT5
CAT5e
CAT6
Unshielded (UTP)
Solid
Shielded (STP)
Unshielded (UTP)
Stranded
Shielded (STP)
Termination
Please use
EIA/TIA-568-B
termination (
T568B
) at any
time
