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1. When adjusting the signal level on the receiver unit, please dial the rotary control switch from MIN to MAX and stop
turning the rotary switch whenever the audio/video is playing normally. Inappropriate signal level setting may cause
overpowering issue that would shorten the product life significantly!
2. If the DVI or HDMI™ device requires the EDID information, please use AT-DVISync EDID Reader/Writer to retrieve and
provide DVI or HDMI™ display EDID information.
3. All HDMI™ over CAT5 transmission distances are measured using Belden 1583A CAT5e 125MHz UTP cable and
ASTRODESIGN Video Signal Generator VG-859C.
4. 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 300m [1,000ft] 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.
5. EIA/TIA-568-B termination (T568B) for Cat-5/5e/6 cables is recommended.
6. 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.
7. Because the quality of the category 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.
8. 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 rating
Type of category cable
Wiring
Shielding
CAT5
CAT5e
CAT6
Solid
Unshielded (UTP)
Shielded (STP)
Stranded
Unshielded (UTP)
Shielded (STP)
Termination
Please use
EIA/TIA-568-B
termination (
T568B
) at any time
NOTICE
PERFORMANCE GUIDE
