StarTech.com ST121EXT - Manual (Page 11)

Instruction Manual 8
Operation
ST1214T/ ST1218T, ST121EXT and ST121R all provide LED indicators, allowing simple
operating status monitoring. Once the power adapter has been connected, the Power
LED will become illuminated; similarly, when the unit is in use (i.e. transmitting a video
signal), the Active LED will become illuminated.
Signal Equalizer Selector (ST121R, ST121EXT)
The Signal Equalizer Selector on the Receiver and Extender Units can be adjusted to
obtain the optimal video signal for various cable lengths. There are four settings on the
selector switch, indicating cables of different lengths. The following table can be used as a
reference for selecting the appropriate setting:
Wiring Diagram
The Video Extenders requires an unshielded twisted pair Cat5 cable no longer than 150m
(492ft). The cable must be wired according to the EIA/TIA 568B industry standard as
shown below.
Pin Wire Color Pair
1 White/Orange 2
2 Orange 2
3 White/Green 3
4 Blue 1
5 White/Blue 1
6 Green 3
7 White/Brown 4
8 Brown 4