LevelOne HVE-9900 - Manual (Page 26)

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1. Please read user manual carefully before operating the device.
2. Please use the power supply unit accompanied with this product. Warranty does not cover
for damages caused by pairing other power adaptor.
3. Please check all connecting devices are properly grounded to avoid electric failure.
4. This product has limited warranty for one year from defects in material and workmanship.
Items that are physically damaged, misused, tempered with or altered are void of warranty.
For further details please contact your distributor. In case warranty sticker is damaged or
missing, warranty is void. For further details please contact your distributor.
5. All of the transmission distances are measured by using Belden Cat.5e 125MHz solid UTP
cables and ASTRODESIGN Video Signal Generator VG-859C as the HDMI source.
6. When adjusting the signal level on the receiver unit, dial the rotary control switch from 7 to 0
and stop turning the rotary switch whenever the audio/video is playing normally.
Inappropriate signal level setting may cause overpowering issues that would shorten the
product’s life significantly!
7. 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 or 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 CAT5e cable shows longer
transmission range than stranded STP CAT6 cable. For long extension applications, solid
UTP/STP cables are the only viable choice.
8. EIA/TIA-568-B termination (T568B) is preferred for better performance.
9. To reduce the interference among the unshielded twisted pairs of wires in category cable,
use double shielded STP cables to improve EMI problems, which is worse in long
transmission.
10. Because the quality of the category cables has the major effects 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.5e/6 cables. For desired resolutions
greater than 1080i or 1280x1024, a solid STP Cat.6 cable is recommended.
11. If your HDMI display has multiple HDMI inputs, the first HDMI input [HDMI input #1] generally
can produce better transmission performance among all HDMI inputs.
12. If the HDMI or DVI device requires EDID information, use an EDID Reader/Writer to retrieve
and provide the EDID information of the DVI or HDMI display.
Performance Guide for HDMI over Category Cable Transmission
Performance rating Type of category cable
Wiring Shielding CAT5 CAT5e CAT6
Solid
Unshielded (UTP)   
Shielded (STP)   
Stranded
Unshielded (UTP)   
Shielded (STP)   
Termination Use EIA/TIA-568-B termination (T568B) at any time
NOTICE