Nevion SDI-TD-MUX-4 - Manual (Page 18)

SDI-TD-MUX-4 / SDI-TD-DMUX-4 Rev. N
nevion.com | 18
6 Connections
6.1 Power connections
Power is applied to the board via the backplane board, which in turn is plugged into the
power distribution bus in the Flashlink rack.
The SDI-TD-MUX-4 board consumes slightly more than the full maximum of 3 watts from the
+5V supply and slightly more than the full maximum of 1.5 watts from the +15V supply
available at the backplane. The SDI-TD-DMUX-4 consumes 3.5W from the +5V supply and
1.8W from the +15V supply. In both cases this limits the number of boards in a rack to 8
boards plus Multicon GYDA, when using a standard single power supply.
Note that both boards can run on a single 5V supply, but then the full power of about 4.5
watts will be drawn from the 5V supply. The boards automatically adapts to sharing the load
between +5V and +15V when 15V is available.
6.2 Backplane
The SDI-TD-MUX-4 and SDI-TD-DMUX-4 boards use the same backplane.
Figure 10 shows the backplane rear view. The signal directions indicated are for the SDI-TD-
MUX-4 card, with the DMUX in parentheses. When the backplane is used for the SDI-TD-
DMUX-4, the directions of SD1-SD4, HD electrical and HD optical will be reversed.
The SD1 to SD4 connectors are for 270 Mbps SD-SDI or DVB-ASI signals.
The HD output carries the electrical HD-signal with the four input signals time division
multiplexed according to the SMPTE 346M-2000 standard.
The optical and electrical outputs both carry the same HD-signal.
The GPI outputs are alarm signals for driving external alarm devices.
SD2 Input
HD Optical Output
SD3 Input
SD1 Input
SD4 Input
GPI Outputs
HD Electrical Output
Figure 10: Rear view of the backplane
The following connectors are available:
Name Description Connector Type
SD1 Input (Output) for 270 Mbps SD-SDI or DVB-ASI. BNC
SD2 Input (Output) for 270 Mbps SD-SDI or DVB-ASI. BNC
SD3 Input (Output) for 270 Mbps SD-SDI or DVB-ASI. BNC
SD4 Input (Output) for 270 Mbps SD-SDI or DVB-ASI. BNC