PXI-6509
10 MHz参考时钟连接器
当NI PXI机箱上的10 MHz Ref In连接器检测到信号时，背板会自动
将PXI\U CLK10、PXIe\U CLK100和PXIe\U SYNC100信号锁定到此外部时钟，并
将这些信号分配到外围插槽以进行同步。
此外，您可以使用10 MHz Ref Out连接器将背板的PXI\U CLK10路由到另一个
用于同步的机箱，或者您可以插入定时和同步模块（例如
PXIe-6674T），以驱动具有更高稳定性时钟的机箱的PXI\U CLK10。
PXIe-1095、PXIe-1092和PXIe-1084上的10 MHz REF连接器包括在
机箱作为定时和同步升级选项的一部分。
图6：。PXIe-1095机箱上的10 MHz参考输入和输出SMA连接器，用于多机箱同步
19B对等流媒体
处理密集型应用程序（如5G无线通信原型制作或实时频谱分析（RTSA））需要添加在线、用户定义的FPGA处理。镍PXI
Express机箱和软件支持从模块化仪器到FPGA的对等通信
绕过PXI嵌入式控制器的在线信号处理模块。
有关更多信息，请阅读白皮书：业界高性能的流媒体体系结构
PXI Express平台。
图7：。PXIe-1085 24 GB/s机箱提供8 GB/s对等流带宽。

10 MHz REF Clock Connectors When the 10 MHz Ref In connector on NI PXI chassis detects a signal, the backplane automatically phase locks the PXI_CLK10, PXIe_CLK100, and PXIe_SYNC100 signals to this external clock and distributes these signals to the peripheral slots for synchronization. Additionally, you can use the 10 MHz Ref Out connector to route the backplane’s PXI_CLK10 to another chassis for synchronization, or you can insert a timing and synchronization module (for example, the PXIe-6674T) in the system timing slot to drive the PXI_CLK10 of the chassis with a higher stability clock. The 10 MHz REF connectors on the PXIe-1095, PXIe-1092, and PXIe-1084 are included on the rear of the chassis as part of their timing and synchronization upgrade options. Figure 6. 10 MHz Reference In and Out SMA connectors on the PXIe-1095 chassis for multi-chassis synchronization 19BPeer-to-Peer Streaming Processing-intensive applications such as prototyping 5G wireless communications or performing realtime spectrum analysis (RTSA) warrant the addition of in-line, user-defined FPGA processing. NI PXI Express chassis and software enable peer-to-peer communication from a modular instrument to an FPGA module for in-line signal processing that bypasses the PXI embedded controller. For more information, read the white paper: Streaming Architecture of the Industry’s Highest Performance PXI Express Platform. Figure 7. The PXIe-1085 24 GB/s chassis provides 8 GB/s peer-to-peer streaming bandwidth.