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Page 61 MNNCEKRKB1_0439
6 Telemetry control
6.1 Controllin g the telemetry directly and using video systems
Using the new matrix serie (EKR-8/4, EKR-16/4) it is possible to control a telemetry line directly from the video
device. This saves an output telemetry cable from the keyboards.
This series of switchers can also be used for the transmission of telemetry commands on the video signal coax.
Control is of the traditional type, with the keyboard controlling two
distinct communication channels: receiver R1 is controlled by
keyboard line A; the VIDEO line controls the SM matrix.
There are two output cables from the keyboard.
The video cable of camera C1 can pass through video signal
management devices such as video multiplexers, video
distributors, twisted pair transmitters, etc.
Telemetry control is carried out by the AUX outlet of the video
matrix.
There is only one output cable from the keyboard.
The SM matrix should be set up to retransmit the telemetry
messages using the MACRO or VIDEOTEC protocol. Receiver
R1 should be able to recognise the transmitted protocol (MACRO
or VIDEOTEC).
Communication between keyboard and matrix can only use the
MACRO protocol.
The video cable of camera can pass through video signal
management devices such as video multiplexers, video
distributors, twisted pair transmitters, etc.
Telemetry line A (or B) is set up to transmit messages along the
video cable, so that the A (or B) connector on the back of the
keyboard may not be used to address other telemetry devices,
but should be left without a connection.