Symmetricom 1100, 1000 manual GPS Inputs, Non-Revertive1 Revertive2, LOS INP2 INP1

Chapter 1 Overview of the TimeProvider

Reference Input Signals

Table 1-3. Subtending-Based Reference Selection Scenarios (Continued)

Sequence	QLevel on	QLevel on	Active Reference
	INP1	INP2	Non-Revertive1	Revertive2
7	LOS	LOS	Holdover	Holdover
8	LOS	1	INP2	INP2
9	1	1	INP2	INP1

Note:

1Non-revertive example. Priority Levels set to: INP1 = 3, and INP2 = 3

2Revertive example. Priority Levels set to: INP1 = 1, and INP2 = 2

GPS Inputs

Symmetricom provides a complete GPS antenna system for the TimeProvider. This includes the Symmetricom GPS Antenna, the TimeProvider Interface Unit (TPIU), and associated cables. An integrated IMC/TPIU is available for installations where rack space is at a premium. Figure 1-8illustrates the TPIU, and Figure 1-9illustrates the integrated IMC/TPIU. See Making GPS Connections, on page 71 for more information on installing the GPS Antenna and the TPIU or IMC/TPIU.

Figure 1-8. The TimeProvider Interface Unit (TPIU)

Figure 1-9. The Integrated IMC/TPIU

38 TimeProvider User’s Guide 097-58001-02 Revision G – April 2008