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097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 37
Chapter 1 Overview of the TimeProvider
Reference Input Signals
Subtending Mode
Table 1-3 illustrates which input is the active system reference under several
different input conditions when the TimeProvider is in the Subtending mode.
Table 1-2. SSU-Based Reference Selection Scenarios
Sequence
QLevel on
PRS
QLevel on
INP1
QLevel on
INP2
Active Reference
Non-Revertive
1
Note:
1
Non-revertive example. Priority Levels set to: PRS = 3, INP1 = 3, and INP2 = 3
Revertive
2
2
Revertive example. Priority Levels set to: PRS = 2, INP1 = 1, and INP2 = 2
1222PRS INP1
2422INP1 INP1
3442INP2 INP2
4444INP2 INP1
5442INP2 INP2
6422INP2 INP1
7222INP2 INP1
822LOSPRS INP1
92LOS2PRS PRS
10 LOS LOS 2 INP2 INP2
11 LOS LOS LOS Holdover Holdover
12 LOS LOS 2 INP2 INP2
13 2 LOS 2 INP2 PRS
14 2 2 2 INP2 INP1
Table 1-3. Subtending-Based Reference Selection Scenarios
Sequence
QLevel on
INP1
QLevel on
INP2
Active Reference
Non-Revertive
1
Revertive
2
111INP1 INP1
221INP2 INP2
322INP2 INP1
421INP2 INP2
511INP2 INP1
6 1 LOS INP1 INP1