Symmetricom 1100 用户手册
097-58001-02 Revision G – April 2008
TimeProvider User’s Guide
33
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.
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.
describes the Output Modules available for the TimeProvider and the Expansion
Panel.
Panel.
Expansion Panel
The Expansion Panel provides up to 32 additional outputs that the TimeProvider
can generate. See
The Expansion Panel provides up to 32 additional outputs that the TimeProvider
can generate. See
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
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
, 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.
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;
according to the type of IOC installed;
lists the power requirements.
The procedure for installing power is described in
Table 1-1. Typical Power Consumption
IOC Type
Max Power (W)
per IOC
Typical Power (W)
per IOC
Crystal
40
30
Rubidium
60
40
(70 with two Rb IOCs)