The design of HART protocol physical layer based on HT2015 and AD421 is introduced in detail upon the requirement of HART protocal physical layer.
针对HART协议物理层的要求，详细介绍了基于HT2015和AD421的HART协议通信物理层设计。
Each layer employs the services of the layer underneath, which enables a top layer protocol to transmit messages over the physical network.
每个层都使用下面一层的服务，这使得顶层协议能够在物理网络上传输消息。
Integrated protocol analyzer: protocol viewer, can quickly and thoroughly understand the relationship between the protocol layer and the physical layer data packets and time.
协议分析仪：选择集成的协议查看器，可快速、深入地了解协议层和物理层之间的数据包和时间关系。
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