
12
TimeSource 3000
Description
097-72000-02 Issue 6: October 2003
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1
Overview
The TimeSource 3000 is a Primary Reference Source (PRS) that receives and processes
signals from GPS satellites, and outputs Stratum 1 synchronization signals traceable to UTC.
TimeSource 3000 applications include synchronization for central offices, radio base
stations, transmission nodes, and other instances where a primary reference source can
improve the performance of telephony network facilities.
The TimeSource 3000 creates timing outputs by ensembling signals from several sources.
The sources include GPS signals, an onboard local oscillator, and optional T1 and remote
oscillator signals. Timing outputs created from the ensemble are composed of the most
stable and least noisy parts of each input. Synchronization outputs are delivered in a framed,
all-ones, T1 format, a 10 MHz signal, a 1 pps signal, composite clock signals (optional), and
time of day (TOD) signals.
The TimeSource 3000 minimizes timing impairments such as jitter and wander, that are
created by network and transmission systems. The synchronization timing is traceable to the
GPS, which provides the highest level of synchronization for telephony networks. The
TimeSource 3000 with its GPS input is a stand-alone office PRS. With the optional inputs
ensembled, overall system performance is improved, and holdover is extended if GPS
signals become disrupted.
Содержание TimeSource 3000
Страница 1: ...TimeSource 3000 GPS Primary Reference Source 097 72000 02 Issue 6 October 2003 ...
Страница 47: ...3 Chapter Installation This chapter provides the steps required for installation and power up ...
Страница 107: ...Chapter 4 TL1 Reference This chapter provides information for using the TL1 language ...
Страница 203: ...Chapter 6 Specifications This chapter provides equipment specifications ...