Videoswitch VK-1 - Manual (Page 4)

VK-1 Remote Keyboard User Manual 23/09/2004 11:09
Videoswitch Page 3 Vk602b.doc
1 Controlling a VDM Digital Recorder
1.1 Full Remote Control and Display of Main Monitor
Full remote control of a VDM and display of the main monitor may be achieved by connecting up a VK-1
Keyboard and composite video monitor as shown below.
75 Ohms
IN
ON
MONITOR
DIGITAL RECORDER
VK-1 KEYBOARD
CAT5
CABLE
BNC
CABLE
Note that the control from the Keyboard to the Digital Recorder uses one twisted pair, the video from the
Digital Recorder to the Keyboard uses another pair, and the 12V DC power from the Digital Recorder to the
Keyboard uses another pair.
The above configuration is satisfactory for cable runs up to 200 metres. Above this distance, the video
quality will degrade and it is recommended that a coax video cable be run directly to the monitor.
Additionally, the 12V power supply provided should be plugged into the VK-1 as voltage loss along the
twisted pair cable may be too great. With this alternative connection configuration, only one twisted pair core
is actually used, and cable runs up to 1000m are possible.
If display of the Spot monitor output is also required, a separate video cable will be needed, running from the
Spot monitor output of the VDM Digital Recorder to another monitor.
Note:
CAT5 cables are standard computer network cables that have four twisted pairs and are terminated with
RJ45 connectors. Because they are readily available, pre-terminated with connectors and can be patching
into existing structured cabling in many buildings, they are very easy to use. However, other high quality
twisted pair cables can be used – refer to section 3 to see which pins need to be connected.