Videotec DCT - Manual (Page 53)

5 VIDEO MANAGEMENT
5.1 Introduction
The keyboard is provided with a VIDEO connector to control the video devices. It is necessary to set up both
the keyboard and the controlled device appropriately, because the same communication protocol and
communication rate (baud rate) should be selected for each of them.
If these parameters are configured incorrectly there will be no communication between the devices.
5.1.1 Video: fundamental concepts
All commands sent by the keyboard are directed to the active monitor/video unit, which is always indicated on
the display.
 Selecting the camera is subordinate to its acceptance. If a camera has not been given an accepted value
previously , any attempt to select it will produce an error message.
 Given that not all functions are recognised by the various video devices (DVR, MUX or matrix), if the
operator attempts to send a command that is inconsistent with a given Video protocol, he will be advised of
this by an error message.
 The DCT keyboard is able to control various types of systems and therefore the appearance of the
video/telemetry control area will differ according to the chosen configuration and the device under
selection. There are three distinct situations:
• a matrix connected to the VIDEO connector
• one or more DVR/MUX connected to the VIDEO connector
• a matrix connected to the VIDEO connector and one or more DVR/MUX connected in cascade to the
matrix.
5.1.1.1 Matrix connected to the video connector
1. Video control area
CAMERA
To select the active camera (only if accepted) (see § 4.2.4.1.1 - Cameras connected to a
matrix, page 29).
MONITOR
To select the active monitor (only if accepted) (see § 4.2.4.2.1 - Monitor (connected with
matrix), page 31).
CAMERAS UP/DOWN
To display the preceding or subsequent camera in the matrix sequence.
START AUTOMATIC SEQUENCE
Activates the automatic sequence of the matrix corresponding to the active monitor.
CLEAR
To acknowledge and clear matrix alarms.
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