Kramer Electronics PT-100 - Manual (Page 5)

Overview
3
3 Overview
The PT-100 XGA Line Extender is a high-performance TP (Twisted Pair) line
extender that transmits a computer graphics signal, an audio signal, unidirectional
RS-232 data and 12V DC power over TP cable. The PT-100 lets you adjust the
line level and equalization. This makes it ideal for connecting between sources and
a router where it can be used to match the level each channel independently (see
Figure 2 ).
The PT-100 has a transmission range of more than 100m (320ft) over UTP cabling
providing a total range of more than 200m (640ft) between the TP transmitter and
receiver.
This section describes:
• Using Shielded Twisted Pair/Unshielded Twisted Pair cabling (see
Section 3.1 )
• The Power Connect™ feature (see
Section 3.2 )
• Recommendations for achieving the best performance (see
Section 3.3 )
3.1 Shielded Twisted Pair/Unshielded Twisted Pair
We recommend that you use Shielded Twisted Pair (STP) cable. There are
different levels of STP cable available, and we advise you to use the best quality
STP cable that you can afford. Our non-skew-free cable, Kramer BC-STP is
intended for analog signals where skewing is not an issue. For cases where there is
skewing, our UTP skew-free cable, Kramer BC-XTP, may be used. Bear in mind,
though, that we advise using STP cables where possible, since the compliance to
electromagnetic interference was tested using those cables.
Although Unshielded Twisted Pair (UTP) cable might be preferred for long range
applications, the UTP cable should be installed far away from electric cables, motors
and so on, which are prone to create electrical interference.
However, since the use of UTP cable might cause inconformity to electromagnetic
standards, Kramer does not commit to meeting the standard with UTP cable.
3.2 About the Power Connect™ Feature
The Power Connect feature applies as long as the cable can carry power. This
feature is available when using STP cable and the distance does not exceed 50m on
standard CAT 5 cable. For longer distances, heavy gauge cable should be used
1
.
For units which are connected via RJ-45 connectors, make sure that the shield of
the STP cable is connected to the metal casing of the connectors on both ends of
the cable. For units which are connected via terminal block connectors, the shield
1 CAT 5 cable is still suitable for the video/audio transmission, but not for feeding the power at these distances