タイミングと同期のテスト

Facebook produces some of the most popular websites and apps in the world. Their technologies empower over a billion people around the globe and a crucial enabler for this is their network of datacenters. Read how Facebook synchronized all their servers across many datacenters with sub-millisecond precision and how they were able to improve timing synchronization accuracy from 10 milliseconds to 100 microseconds.

Solve synchronization challenges for enabling breakthrough 5G experiences.

ネットワーク機器に関するタイミングエラーを正確に測定する多大な努力が支払われていますが、1pps出力のない5G NRや4G LTE基地局のタイミングエラーを測定するのは困難です。解決法の1つとして、ダウンリンク無線信号を測定する方法があります。このテクノロジーブリーフは、同期信号をデコードして分析し、外部の参照時刻と比較することで、このようなオーバー・ザ・エアー「タイミングエラー」測定を行う方法を解説します。

Though jitter and wander are closely related, their effects on networks and devices are quite different. Jitter directly causes bit errors at device inputs by the eye-closure mechanism.These bit errors then result in dropped packets. Wander does not impact the input stage but affects the ability of the internal clocking function to lock to and track the up-stream reference. Wander therefore impacts the distribution of clock references across networks.