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
1
2
2
2
PRS
INP1
2
4
2
2
INP1
INP1
3
4
4
2
INP2
INP2
4
4
4
4
INP2
INP1
5
4
4
2
INP2
INP2
6
4
2
2
INP2
INP1
7
2
2
2
INP2
INP1
8
2
2
LOS
PRS
INP1
9
2
LOS
2
PRS
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
1
1
1
INP1
INP1
2
2
1
INP2
INP2
3
2
2
INP2
INP1
4
2
1
INP2
INP2
5
1
1
INP2
INP1
6
1
LOS
INP1
INP1