Miranda NV8144 - Page 40

30 Rev 2.2 • 27 Mar 10
1. Introduction
Front Module Slots and Rear Connections
Figure 1-22 is an example of some of the different types of backplanes. In the NV8576 and
NV8576-Plus frames, backplanes installed in the lower portion of the router are rotated 180° from
those in the upper portion and “face” in the opposite direction. Expansion backplanes featuring ter-
minal block connectors and two expansion connectors are currently under development.
Figure 1-22. Backplanes
Viewing from top to bottom backplanes are grouped by connector type with one backplane for
inputs, the next for outputs and the third for expansion signals. The first set of backplanes feature
LC connectors for fiber optic signals (SD, HD, 3Gig), followed by DIN 1.0/2.3 connectors for coax
signals (SD, HD, 3Gig and AES unbalanced), and lastly terminal block connectors for coax signals
(SD, HD, 3Gig and AES balanced). The last three backplanes are for monitoring signals. There is a
single backplane for the NV8144 and two backplanes for monitoring inputs and outputs in the
NV8280, NV8280-Plus, NV8576 and NV8576-Plus frames.
Notice that the LC connectors are actually modules containing two connectors each. The input
backplane and the expansion backplane contain 5 modules totalling 10 LC connectors each. The
output backplane contains 9 modules for a total of 18 LC connectors. When making input and
FIBER
EXP
COAX
OUT
COAX
EXP
FIBER
OUT
BAL
EXP
BAL
OUT
MV LINK OUT
OUT 2OUT 1
_
+
S
_
+
S
_
+
S
_
+
S
_
+
S
_
+
S
_
+
S
_
+
S
_
+
S
OUTPUT INPUT
OUTPUT INPUT
OUTPUT
INPUT
OUTPUT
INPUT
FIBER
IN
COAX
IN
BAL
IN
MV LINK
OUT
MV LINK
EXP
OUT 2
INPUT
MON
INPUT
MON
OUTPUT
MON
OUTPUT
MON
OUT 2 OUT 1
OUT 1
IN 2
IN 2 IN 1
IN 1
OUTPUT
MONITOR
INPUT
MONITOR
OUT
OUTPUT
MON
INPUT
MON
OUT
OUTPUT
MONITOR
INPUT
MONITOR
FIBER OUTPUT
MULTIVIEW OUTPUT
MULTIVIEW
EXPANSION
FIBER INPUT
FIBER EXPANSION
COAX EXPANSION
COAX OUTPUT
COAX INPUT
AES OUTPUT
AES INPUT
AES EXPANSION
NV8144
MONITOR
NV8280 / NV8576
MONITOR
Fiber Output
Fiber Input
Fiber Expansion
Coax Expansion
Coax Output
Coax Input
Coax Output
Coax Input
Coax Expansion
Monitor NV8144
Monitor
NV8280/NV8576