在2024年巴塞羅納MWC奧運會(huì )上，Rakon展示了突破性的O-RAN優(yōu)化微型OCXO，并延長(cháng)了保持期
Rakon晶振公司將在2024年巴塞羅那MWC展上展示其業(yè)界首個(gè)用于先進(jìn)無(wú)線(xiàn)電網(wǎng)絡(luò )和電信數據中心的長(cháng)期保持解決方案。

錯誤交換OCXO（MercuryX E2）是Rakon新發(fā)布的變體水銀小型集成電路-OCXO晶振。它增強了網(wǎng)絡(luò )同步器評估板上的現有同步功能，為系統增加了頻率誤差交換處理和老化補償功能，使保持性能提高了一倍。

Rakon瑞康晶振產(chǎn)品管理負責人Reza Sedehi表示，錯誤交換OCXO有源晶振是Rakon最新的突破性創(chuàng )新，也是同類(lèi)產(chǎn)品中的第一個(gè)同步解決方案。

Sedehi表示:“相位同步保持對于5G DUs、RAN、無(wú)線(xiàn)電和電信數據中心至關(guān)重要，因為它可以降低移動(dòng)運營(yíng)商的整體運營(yíng)成本。

“傳統上，性能接近24小時(shí)保持的時(shí)鐘體積龐大、耗電量大且價(jià)格昂貴。誤差交換OCXO石英晶體振蕩器是一種出色的解決方案，可實(shí)現更小、更低功耗的參考時(shí)鐘，從而實(shí)現經(jīng)濟高效的系統級同步。我們的新解決方案對于尋求全包式、高性?xún)r(jià)比和小型化解決方案的O-RAN設備供應商尤其有價(jià)值。”

誤差交換同步是一種技術(shù)，旨在通過(guò)使用網(wǎng)絡(luò )處理器和同步PLL顯著(zhù)增強OCXO保持能力（性能提升高達兩倍），通常在IEEE 1588實(shí)施中提供。

PLL和處理器計算OCXO頻率和1PPS信號之間的誤差，然后將其反饋給OCXO進(jìn)行老化補償。OCXO將溫度變化引起的頻率殘余誤差和老化補償誤差結合起來(lái)，并將其反饋到處理器中進(jìn)行系統頻率校正。E2OCXO概念使Rakon OCXO振蕩器能夠在7x5mm的緊湊封裝中在真實(shí)環(huán)境下實(shí)現8小時(shí)的保持。

Mercury E2OCXO正處于原型制作階段，將提供14x9mm、9x7mm和7x5mm石英晶振三種封裝。14x9mm封裝的樣品將于2024年年中上市。

Rakon用于先進(jìn)無(wú)線(xiàn)電網(wǎng)絡(luò )的長(cháng)期保持解決方案

Rakon展示了經(jīng)過(guò)O-RAN優(yōu)化的微型OCXO

Rakon demonstration of groundbreaking O-RAN optimised miniature OCXO with extended holdover at MWC Barcelona 2024

Rakon is demonstrating its industry-first long holdover solution for advanced radio networks and telecom data centres at MWC Barcelona 2024.

The Error Exchange OCXO (MercuryX E2) is a variant of Rakon’s newly released MercuryX small form factor IC-OCXO. It enhances the existing synchronisation capabilities on a network synchroniser evaluation board by adding frequency error exchange processing and ageing compensation to the system – doubling the holdover performance.

Rakon Head of Product Management, Reza Sedehi, says the Error Exchange OCXO is Rakon’s latest groundbreaking innovation and the first synchronisation solution of its kind.

“Phase synchronisation holdover is essential in 5G DUs, RAN, radios and telecom data centres as it reduces the overall operational cost for mobile carriers,” says Sedehi.

“Traditionally, clocks performing close to 24-hour holdover are bulky, power-hungry and expensive. The Error Exchange OCXO is an elegant solution that will result in smaller, low-power reference clocks for cost-effective system-level synchronisation. Our new solution will be particularly of value for O-RAN equipment vendors who look for turnkey, cost-effective and miniaturised solutions.”

Error Exchange Synchronisation is a technique designed to significantly enhance the capability of OCXO holdover (up to twice the performance) by using a network processor and a synchronisation PLL, typically available in IEEE 1588 implementations.

The PLL and the processor calculate the error between the OCXO frequency and the 1 PPS signal, then feed it back to the OCXO for ageing compensation. The OCXO combines the frequency residual error due to temperature variations and ageing compensated error and feeds it back into the processor for system frequency correction. The E2OCXO concept enables Rakon OCXOs to achieve 8 hours of holdover under real world conditions in a compact 7 x 5 mm package.

The Mercury E2OCXO is in prototyping stage and will be available in a 14 x 9, a 9 x 7 and a 7 x 5 mm package. Samples of the 14 x 9 package will be available mid 2024.

Product Name	Package Size (LxWxH)	Nominal Frequency (Fn)	Frequency Stability (FvT)	Temperature Range (°C)
LNO320B1	95 x 76 x 23 mm	320 MHz	≤±1 ppm	0 to 50 °C
LNO320D1	70 x 70 x 35 mm	320 MHz	≤±2 ppm	-40 to 80 °C
LNO480D1	70 x 70 x 35 mm	480 MHz	≤±2 ppm	-35 to 71 °C
LNO480B2	47.5 x 59.5 x 12.7 mm	480 MHz	≤±2 ppm	0 to 50 °C
LNO500B2	47.5 x 59.5 x 12.7 mm	500 MHz	≤±2 ppm	0 to 50 °C
LNO500D1	70 x 70 x 35 mm	500 MHz	≤±1 ppm	-40 to 70 °C
LNO640B1	95 x 76 x 23 mm	640 MHz	≤±2 ppm	0 to 50 °C
LNO640D1	70 x 70 x 35 mm	640 MHz	≤±2 ppm	-40 to 70 °C
LNO800E1	25.4 x 22 x 12.7 mm	800 MHz	≤±3 ppm	0 to 50 °C
LNO960B2	47.5 x 59.5 x 12.7 mm	960 MHz	≤±2 ppm	0 to 50 °C
LNO1000D1	70 x 70 x 35 mm	1 GHz	≤±2 ppm	-40 to 70 °C
LNO1000E1	25.4 x 22 x 12.7 mm	1 GHz	≤±2 ppm	0 to 50 °C
LNO1000B2	47.5 x 59.5 x 12.7 mm	1 GHz	≤±2 ppm	0 to 50 °C
LNO1200B2	47.5 x 59.5 x 12.7 mm	1.2 GHz	≤±2 ppm	0 to 50 °C
LNO1200E1	25.4 x 22 x 12.7 mm	1.2 GHz	≤±2 ppm	0 to 50 °C
LNO1280B1	95 x 76 x 23 mm	1.2 GHz	≤±2 ppm	0 to 50 °C
LNO2000B1	95 x 76 x 23 mm	2 GHz	≤±2 ppm	0 to 50 °C
LNO3200B3	120 x 76 x 23 mm	3200 MHz	≤±2 ppm	0 to 50 °C
LNO4800B3	120 x 76 x 23 mm	4.8 GHz	≤±2 ppm	0 to 50 °C
LNO5000B3	120 x 76 x 23 mm	5000 MHz	≤±2 ppm	0 to 50 °C
LNO10000B3	120 x 76 x 23 mm	10 GHz	≤±2 ppm	-40 to 70 °C