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5−
1
5
Circuit Descriptions
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5.1 General
5.1001 This section discusses the components on each card in the StarClock 200E
system and relates them to block diagrams. There is a block diagram for each
card. Block and application diagrams for the system are shown in Figures 1-2,
2-1, 2-2, 2-3, and 2-4.
5.2 Backplane
5.2010 The backplane is rack mounted in a 19/23 inch (48.2/58.4 cm) shelf. Refer to
Figure 5-1. There are horizontal tie bars across the top and bottom of the
backplane for the purpose of anchoring output wiring cable bundles. Model
54500-16 (for E1) and Model 54500-17 (for T1) shelves appear to be identical,
yet there are minor component value differences.
5.21 Functions
5.2110 The backplane receives all source signals, distributes them to the appropriate
cards (J1 to J8 and J9A to J18A), and provides twenty output connections
(J9B to J18B) for each output card. The backplane also contains a bus for
clocks and inputs. All cards connect to the backplane.
5.22 Circuit
Description
The backplane includes the following components that function as described.
5.2210 Terminal Strip (TB1)
Terminal strip TB1 provides connections for fuse alarms and for major audible,
minor audible, major visual, and minor visual alarms.
5.2211 Terminal Strip (TB2)
TB2 supplies power and ground connection to all cards in the system.
