Symmetricom 1000, 1100 System Power, Output Module, Expansion Panel, TimeProvider Interface Unit

Chapter 1 Overview of the TimeProvider

System Power

Output Module

The Output module provides the output connectors for the TimeProvider. Like the Input module, each Output module uses one of a variety of connectors that match the wiring system at the installation site. Making Output Connections, on page 66, describes the Output Modules available for the TimeProvider and the Expansion Panel.

Expansion Panel

The Expansion Panel provides up to 32 additional outputs that the TimeProvider can generate. See Expansion Panel, on page 21 and Rack Mounting, on page 56 for more information.

TimeProvider Interface Unit

The TimeProvider Interface Unit (TPIU) provides power, communication, and a composite timing reference signal between the antenna and the TimeProvider main shelf. The TPIU is an external, stand-alone rack mounted assembly included in Antenna Kits 990-58545-01 and 990-58545-02. The TPIU can be used only with IMC card 090-58031-01. During antenna installation, you can use the LEDs on the TPIU to detail the status of the received power and antenna communication. See Making GPS Connections, on page 71 for more information.

System Power

The TimeProvider main shelf has redundant –48v DC inputs. The inputs are diode or’d; in the event that one supply fails, the other takes over. The –48v returns are isolated from the chassis and circuit grounds. A 5 A fuse on the IOC protects the TimeProvider; the shelf is protected from damage in case the connections are reversed.

The power supply range is from –36 to –72 V DC. The power requirements vary according to the type of IOC installed; Table 1-1lists the power requirements.

Table 1-1. Typical Power Consumption

IOC Type	Max Power (W)	Typical Power (W)
	per IOC	per IOC
Crystal	40	30
Rubidium	60	40
		(70 with two Rb IOCs)

The procedure for installing power is described in Making Power Connections, on page 61.

097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 33