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    • N4916B 解加強信號轉換器,具選配的時脈倍頻器 [已停產]

    N4916B 解加強信號轉換器,具選配的時脈倍頻器

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    HIGHLIGHTS

    使用信號解加強(de-emphasis)技術,精確分析 multi-gigabit串列介面的特性:

    • 可運用一個前標記()和兩個後標記(),調整解加強位準,範圍從0.0 dB到12.0 dB
    • 支援 660 Mb/s 至 10.5 Gb/s 的資料速率
    • 可容忍非平衡碼型
    • 不會影響抖動
    • 可彈性地當作 Keysight J-BERT N4903A/B、ParBERT 81250A 或其他碼型產生器的前端處理單元。
    • 選配的時脈倍頻器(選項 001)
    • 體積輕巧
    • 可透過 Keysight J-BERT N4903B 編寫程式,也可獨立開發程式

    為何要執行信號解加強?

    以 gigabit 的資料速率傳送數位電子信號時,可使用解加強技術。 解加強是一種信號預失真補償(pre-distortion)方法,可以補償電子信號以 資料速率,通過印刷電路板的跑線、背板或長纜線之後,信號品質變差的狀況。由於下一代串列匯流排標準的速度將超過 5 Gb/s,工程師須執行精密的信號解加強處理和多 tap 有限脈衝響應(FIR)過濾。

    許多常見的高速數位介面都使用解加強技術,例如 PCI Express®、SATA、USB3、QPI、、IEEE 802.3 背板(10GBASE-KR、40GBASE-KR4)。

    Keysight N4916B 提供那些功能?

    研發和測試工程師可使用新的 Keysight N4916B 解加強信號轉換器,精確地模擬發射器的解加強功能。

    Keysight N4916B可以讓使用者運用一個前標記和兩個後標記,模擬發射器的解加強功能,並且可以分別調整解加強位準,最大可調的範圍高達12.0 dB。 透過其直流耦合的輸出功能,此信號轉換器甚至可以接受非平衡式的資料碼流。 Keysight N4916B也可以處理資料和時計上的信號抖動,因此可以模擬出接收器在真實世界中,需要應付的解加強和抖動環境。 解加強技術還可補償信號通過纜線、夾具或測試儀中的測試電路板後,所出現之信號失真問題,進而更精確地分析元件特性。

    全新的解加強信號轉換器可當作 Keysight J-BERT N4903A/B、ParBERT 81250A 或其他碼型產生器的前端處理單元。。 使用者可透過其 USB 介面使用 Keysight J-BERT N4903A/B 的操作介面,或是自行發展獨立操作介面,來控制 Keysight N4916B。

    Keysight N4916B 的時脈倍頻選項提供那些功能?

    時計倍頻器選項可使用半速的時脈,來計算並分析發射器的錯誤。 欲使用 Keysight J-BERT N4903A/B 的錯誤、眼圖或抖動分析功能,則需使用全速的時脈。

    N4916B 和 N4916A 最主要的差異為何?

    • 三個可調整標記(N4916A 提供一個 post-cursor,足以測試 < 5 Gb/s 的資料速率)
    • 選配的時脈倍頻器
    • 獨立的操作介面
    • 最高的資料速率

    PCIe 和 PCI Express 是 PCI-SIG 的商標以及註冊商標。


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