高品質(zhì)XO時(shí)鐘振蕩器ASE2-27.000MHZ-ET非常適合5G小區(qū)時(shí)序參考
來源：http://www.mxsir.cn 作者：hssi 2022年10月19
The introduction of 5G challenged many component manufacturers who serve the telecom industry.
Timing and Synchronization is certainly one of them. Implementing features such as beam steering and
millimeter wave communication called for much more accurate timing solutions. These solutions would
also have to be robust given the varying environmental condition where the small cells would be installed.
As the industry shifts towards a more complex Radio Access Network (RAN), it is expected to see more
of a cohesive and standardized approach to its implementation. The Open RAN architecture (O-RAN) is
on the forefront of this initiative.
Within O-RAN, the remote radio unit (RRU) serves as the access point to the network. A user will connect
to the RRU, the data will reach a front haul switch, and then proceed to an edge server or distributed
unit (DU). The DU will then pass information to the central unit. Synchronization between these stages is
critical for 4G, but even more critical for new 5G applications. This is accomplished using a synchronization
method governed by a Precision Clock Synchronization Protocol called IEEE 1588.
高品質(zhì)XO時(shí)鐘振蕩器ASE2-27.000MHZ-ET非常適合5G小區(qū)時(shí)序參考，5G的引入給許多服務(wù)于電信行業(yè)的零部件制造商帶來了挑戰(zhàn)。定時(shí)和同步當(dāng)然是其中之一。實(shí)現(xiàn)諸如光束轉(zhuǎn)向和毫米波通信需要更精確的計(jì)時(shí)有源晶振解決方案。這些解決方案將也必須是堅(jiān)固的考慮到不同的環(huán)境條件下，小電池將被安裝。
高品質(zhì)XO時(shí)鐘振蕩器ASE2-27.000MHZ-ET非常適合5G小區(qū)時(shí)序參考，隨著行業(yè)轉(zhuǎn)向更復(fù)雜的無線接入網(wǎng)(RAN)，預(yù)計(jì)將看到更多一個(gè)內(nèi)聚的和標(biāo)準(zhǔn)化的方法來實(shí)現(xiàn)它。Open RAN架構(gòu)(O-RAN)是站在這一倡議的前沿。石英晶體振蕩器將會(huì)成為主流趨勢(shì)。
| Manufacturer Part Number | Manufacturer品牌 | Series | Type 類型 | Frequency 頻率 | Voltage - Supply電壓 | Operating Temperature 工作溫度 |
| ASFL1-32.000MHZ-L-T | Abracon晶振 | ASFL1 | XO (Standard) | 32MHz | 3.3V | -40°C ~ 85°C |
| ASFL1-33.333MHZ-L-T | Abracon晶振 | ASFL1 | XO (Standard) | 33.333MHz | 3.3V | -40°C ~ 85°C |
| ASFL1-14.7456MHZ-L-T | Abracon晶振 | ASFL1 | XO (Standard) | 14.7456MHz | 3.3V | -40°C ~ 85°C |
| ASFL1-40.000MHZ-L-T | Abracon晶振 | ASFL1 | XO (Standard) | 40MHz | 3.3V | -40°C ~ 85°C |
| ASV-10.000MHZ-LCS-T | Abracon晶振 | ASV | XO (Standard) | 10MHz | 3.3V | -40°C ~ 85°C |
| ASFL1-64.000MHZ-EC-T | Abracon晶振 | ASFL1 | XO (Standard) | 64MHz | 3.3V | -20°C ~ 70°C |
| ASVTX-11-121-19.200MHZ-T | Abracon晶振 | ASVTX-11 | VCTCXO | 19.2MHz | 3.3V | -40°C ~ 85°C |
| ASE-60.000MHZ-ET | Abracon晶振 | ASE | XO (Standard) | 60MHz | 3.3V | -20°C ~ 70°C |
| ASE2-12.500MHZ-ET | Abracon晶振 | ASE2 | XO (Standard) | 12.5MHz | 2.5V | -20°C ~ 70°C |
| ASE-22.000MHZ-ET | Abracon晶振 | ASE | XO (Standard) | 22MHz | 3.3V | -20°C ~ 70°C |
| ASE2-27.000MHZ-ET | Abracon晶振 | ASE2 | XO (Standard) | 27MHz | 2.5V | -20°C ~ 70°C |
| ASE2-32.000MHZ-ET | Abracon晶振 | ASE2 | XO (Standard) | 32MHz | 2.5V | -20°C ~ 70°C |
| ASE2-48.000MHZ-ET | Abracon晶振 | ASE2 | XO (Standard) | 48MHz | 2.5V | -20°C ~ 70°C |
在O-RAN中，遠(yuǎn)程無線電單元(RRU)充當(dāng)?shù)骄W(wǎng)絡(luò)的接入點(diǎn)。用戶會(huì)選擇貼片石英晶振，也會(huì)連接到RRU，數(shù)據(jù)將到達(dá)前端傳輸開關(guān)，然后繼續(xù)到邊緣服務(wù)器或分布式服務(wù)器單位(DU)。然后，DU將信息傳遞給中央單元。這些階段之間的同步是對(duì)于4G來說至關(guān)重要，但對(duì)于新的5G應(yīng)用來說更是如此。這是通過同步來完成的方法受稱為IEEE 1588的精確時(shí)鐘同步協(xié)議控制。
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