Videotec DCT User Manual
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6 TELEMETRY
6.1 Direct control and control using video systems
If you have no video devices or you need to control only domes or telemetry receivers, the VIDEO line will
not be utilised, while either one or both of Telemetry lines A and B may be used indifferently.
In addition to this type of connection, the ENEO EKR and VIDEOTEC SM...A families of matrixes and some
DVR's and MUX's can be used to install three further types of telemetry control systems:
traditional connection with one video line and two distinct, independent telemetry lines.
connection to the video matrix and controls via the matrix AUX output
connection to the video matrix/DVR/MUX and controls via the video signal cable of the device.
TRADITIONAL
Traditional type of control, with the keyboard controlling three distinct communication
channels: receiver R1 is controlled by keyboard line A (or B); the VIDEO line controls
the matrix.
ADVANTAGES: the video cable of camera C1 can pass through video signal
management devices such as video multiplexers, video distributors, transmitters via
twisted pair, etc.
DISADVANTAGES: The keyboard has more than one output cable.
VIA AUX M
A
TRICE
Telemetry is controlled via the video matrix AUX output.
The matrix should be configured to retransmit the telemetry messages.
Telemetry line A (or B) is configured to transmit messages along the video cable,
therefore the A (or B) connector on the back of the keyboard cannot be used to address
other telemetry devices but should be left disconnected.
ADVANTAGES: The keyboard has only one output cable.
The video cable of camera C1 can pass through video signal management devices such
as video multiplexers, video distributors, transmitters via twisted pair, etc.
DISADVANTAGES: Only the MACRO protocol can be used for communication
between the keyboard and the matrix.
VIA VIDEO CABLE
Telemetry is controlled by output signals from the video unit along the video signal
coaxial cable.
If a matrix is used, it should be configured to retransmit the telemetry messages using
the FSK protocol along the video input cables.
If a DVR/MUX is used, it should be configured so that each video input is enabled for
COAX transmission.
The video cables from the receivers to the video device cannot pass through any device
(e.g. video distributors) and must be direct.
The telemetry line A (or B) is configured to transmit messages along the video cable,
therefore the A (or B) connector on the back of the keyboard cannot be used to address
other telemetry devices but should be left disconnected.
ADVANTAGES: The keyboard has only one output cable.
The video unit has only video output cables.
DISADVANTAGES (only for connection to a video matrix): The system only
functions when receiver R1 is provided with the DTCOAX decoder card (only with
VIDEOTEC protocol).
Communication between keyboard and matrix can only use the MACRO protocol.
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