User`s manual

6
NOTICE
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.