Bits supplies the synchronous timing signal to these equipments inside the telecommunicationt building , such as dps , atm , no . 7 , dxc , tm & adm in sdh , don and in etc . the related techniques are involved in the content of synchronization ne twork , timing distribution , the timing signal transportations x impairments etc . the second chapter tells the structure and the function of the building integrated timing system . the third chapter summarizes the digital synchronization network techniques , which emphasizes the basic concept of synchronization networks analyzes the necessity of building the synchronization network and introduces all kinds of synchronization methods . the fourth chapter represents the transportation of the synchronization signal 本文第二章講述了通信樓綜合定時(shí)系統(tǒng)的構(gòu)成及作用:第三章概述了數(shù)字同步網(wǎng)技術(shù),著重描述了同步網(wǎng)的基本概念,分析了建立同步網(wǎng)的必要性,講述了各種同步方法;第四章闡述了同步定時(shí)信號(hào)的傳輸;第五章介紹了bits設(shè)備所支持的同步狀態(tài)消息;第六章、第七章為本文的重點(diǎn),通過(guò)對(duì)時(shí)鐘信號(hào)建立數(shù)學(xué)模型,從理論上分析時(shí)鐘內(nèi)部噪聲和相位瞬變產(chǎn)生時(shí)鐘定時(shí)信號(hào)損傷的原理,企圖尋找到更好地控制頻率漂移的方法。
Timing & synchronization is a key technology in digital communication network . building integrated timing system ( bits in short ) equipment is the most common synchronization supply equipment in digital synchronization network , which also is the key equipment supplying telecommunication network signal 定時(shí)與同步是數(shù)字通信網(wǎng)的一項(xiàng)關(guān)鍵技術(shù),通信樓綜合定時(shí)系統(tǒng)( buildingintegratedtimingsystem ,簡(jiǎn)稱bits )設(shè)備是數(shù)字同步網(wǎng)中最常見(jiàn)的同步供給設(shè)備,也是提供電信網(wǎng)同步信號(hào)的關(guān)鍵設(shè)備。