User manual

Installation and User Manual ADPRO FastTx by Xtralis
36 Doc 11949_06
3.4 Video Input Connections
Depending on the model, up to 20 video sources can be connected via the female BNC sockets.
The sources should generate a 1.0-volt peak to peak composite colour or black and white video
signal when terminated with a 75-ohm load. A combination of colour and black and white
cameras can be used.
To ensure high picture quality, each video input must be terminated either at the chassis itself or
by other external equipment. The Camera Terminated option in the Connected Equipment /
Cameras screen (via the Connection menu / Installer Menu option) allows individual channels
to be terminated with 75-ohm or left un-terminated, for example, when the video signal is looped
out to other equipment such as a video monitor or video matrix switcher (refer to Camera
Settings on page 72). The external equipment must provide the channel termination. The default
menu option is Camera Terminated.
Caution: Video terminations are OFF when power is removed.
The video terminators on the ADPRO FastTx will disconnect when power to the unit
is removed. If the video inputs are also connected to other equipment, the ADPRO
FastTx should NOT be used to provide a 75-ohm termination point.
Caution: Installations in Lightning Prone Areas
In lightning prone areas, in-line coaxial lightning arresters should be used on the
video cables. The arresters should be installed at the cable entry of the building that
houses the ADPRO FastTx. Cameras should also have suitable lightning protection
rods installed as close to them as possible. The use of fibre optics to provide
electrical isolation on the video signals is strongly recommended in high-risk areas.
Figure 40: Video Configuration