7
NOTICE
1.
All transmission distances are measured using Belden 1583A CAT-5e 125MHz LAN cable and
ASTRODESIGN Video Signal Generator VG-859C. The transmission distance is defined as the
distance between the video source and the VGA display.
2.
The transmission length is largely affected by the type of LAN cables, the type of video sources,
and the type of display. The testing result shows solid LAN cables (usually in bulk cable 300m or
1000ft form) can transmit a lot longer signals than stranded LAN cables (usually in patch cord
form). Shielded STP cables are better suit than unshielded UTP cables. A solid UTP CAT5e cable
shows longer transmission length than stranded STP CAT6 cable. For long extension users, solid
cables are your only choice.
3.
To reduce the interference among the unshielded twisted pairs of wires in LAN cable, you can
use shielded LAN cables to improve EMI problems, which is worsen in long transmission.
4.
Because the quality of the LAN cables has the major effects in how long transmission distance
will be made and how good is the received display, the actual transmission length is subject to
your LAN cables. For resolution greater than 1080i or 1280x1024, a CAT-6 cable is
recommended.
5.
The analog audio is sampled by 48kHz before transmission; on the remote RX unit with S/PDIF
audio input, the only supported sampling frequency is 48kHz.
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
