GRASS VALLEY TRINIX NXT -, Installation Manual

Page: 88 / 449

88 Trinix NXT — Installation and Service Manual
Section 9 — Planning Guide
Figure 46. 512 x 512 System Expanded to 1024 x 512
Frame 1 contains no input or output boards, but the wiring has already
been installed between Frame 1 and the PE-331016 Port expanders.
Now consider Output 1 of Frame 0. This signal is connected to Input 1A of
the first PE-33016 Port expander. See
Figure 47 below.
Figure 47. Detail of One PE-33016
In this example:
• Only Input 1A and Output 1A are presently functional.
• Output 1B is fitted with a 75-ohm BNC terminator, which is following
the rule that unused connectors should be terminated.
• Input 1B is pre-wired to Frame 1, so there is no place for a terminator.
In this case, termination will be provided by an LD-33100 Loader board,
which has been installed in output board slot 1-32 of Frame 0. Further-
more, in this example all 16 output slots of Frame 0 should have an LD-
33000 installed.
• When the system is upgraded to 1024 x 512, the LD-33000 boards will
be removed and replaced by output boards. The cabling to the port
expanders is already in place.
Frame 0
Trinix
512 x 512
1 - 512
1 - 512
Future input
wiring
1 - 512
outputs
32
PE 33016
used as
combiners
Trinix
512 x 512
Frame 1
(unused)
Installed pre-wiring
Output slots should be terminated
using LD-33100 Loader boards
Input 1B - from Frame 1 Output 1.
Input 1A - from Frame 0 Output 1
Output 1A - to downstream equipment
Output 1B - not used. Termination provided by
Termination provided by LD-33000
75-ohm BNC terminator
in upstream Trinix frame.