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Page 44 MNNCEKRKB1_0439
5.13 Video mu ltiplexer Javelin
5.13.1 Description
The Javelin multiplexer allows the connection of 16 input videos, which are digitalized and shown as a
composite image at output. A spot service monitor supplies the display of one of the inputs.
Communication from keyboard to multiplexer is one-way. It is necessary to determine whether the connected
multiplexer is a black & white or colour model, since the specifications and protocols are different in the two
cases.
It is also possible to control the multiplexer indirectly, using a new generation video matrix (EKR-8/4, EKR-16/4).
This type of control is described in § 5.15 - Controlling the multiplexer using a video device, page 48.
5.13.2 Direct conn ection
5.13.2.1 Cable
RJjack1 RJjack2
L=1200 m
EKR-KB1 RJjack 1 RJjack 2 JAVELIN
RS485A White Black RS485A
RS485B Yellow Green RS485B
The connection is of the RS485 type (one-way) and the maximum distance between keyboard and multiplexer is
1200 metres.
5.13.2.2 Multiplexer settings
The Javelin multiplexer is available in two versions that differ in their control protocol.
It can only be set up using the local multiplexer keyboard. Setup the RS485 communication mode, the baud rate
and A protocol.
See the respective manual.
5.13.2.3 Keyboard settings
While the keyboard is being set up, the
submenu should be set as
follows:
Control of a Javelin multiplexer
It is necessary to specify whether the multiplexer is a colour
model (
) or black & white ().
Four baud rate values are available.
It is only possible to connect one keyboard to each Javelin multiplexer, and therefore the identification number
of the keyboard is of no importance. More than one multiplexer can be controlled by the same keyboard, as long
as they are identified by different unit numbers.