8
NOTICE
1. When adjusting the signal level on the Receiving 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. Wrongly insert IR blaster and IR receiver to wrong 3.5mm infrared sockets may result in the failure of the IR
extenders. Please check carefully before plugging in the IR extender to the respective IR sockets.
3. 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.
4. All HDMI over CAT5 transmission distances are measured using Belden 1583A CAT5e 125MHz UTP cable and
ASTRODESIGN Video Signal Generator VG-859C & VG-870B.
5. 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.
6. EIA/TIA-568-B termination (T568B) for Cat-5/5e/6 cables is recommended for better performance.
7. To reduce the interference among the unshielded twisted pairs of wires in Cat-5/5e/6 cable, one can use
shielded STP cables to improve EMI problems, which is worsen in long transmission.
8. 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.
9. 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
Solid
Unshielded (UTP)
Shielded (STP)
Stranded
Unshielded (UTP)
Shielded (STP)
Termination
Please use EIA/TIA-568-B termination (T568B) at any time
