Nevion DA-3GHD-8-PL - Manual (Page 10)

DA-3GHD-8-PL / DA-3GHD-8 Rev. D
nevion.com | 10
4 Connections
Both module versions have a dedicated connector backplane which is mounted at the
rear of the sub-rack. The backplane layout is shown in Figure 6.
Due to signal performance discrepancies in slot 1 (leftmost position), slot 1
may not be used with this product for 3G-SDI.
HD, SD and ASI meets is not affected and meets their respective
performance specifications.
Figure 6: Layout of the backplanes DA-3GHD-8-PL-C1 and DA-3GHD-8-C1.
The electrical input signal is connected to the IN BNC. On the -PL version the signal is
then passively looped to the LOOP-OUT BNC. The LOOP-OUT BNC must not be left
open, if it is not connected to another DA-3GHD-8-PL-C1 backplane, it must be
equipped with a good quality 75ohm ter
mination. All OUT1 to OUT8 BNC’s provides
non-inverted signals and can be used for all formats, included DVB-ASI. Unused
outputs should be terminated with 75ohm.
Note: In an application with two or three distribution cards looped together, the source
SDI-signal will travel through several BCN connector interconnects. It is therefore very
important that those connectors are of good quality and specified for the bitrate used.
Only new and fresh interconnection equipment should be used. This is especially
important to 3G-SDI.