逻辑分析仪16804A-需要的以太网协议提取器

我不确定你知道你要求的是什么，而且它可能不可用。
有更好的工具可以看到这个“以太网”是一个串行标准，在正常使用中，这意味着10BaseT，100BaseT或1000BaseT，它们在物理层非常不同。
除非您可以访问网络接口的“并行”端，否则LA无法执行任何操作： - 10 BASE T是曼彻斯特编码 - 基本上，这意味着每个符号都是位中间的转换
从0到+ v（a 1）的时间或从+ v到0（a 0）的位时间中间的转换。
LA可以在Timing模式下捕获它，但是你必须使用Signal Extractor（SE）工具将其转换为符号，然后使用协议开发工具包（PDK）来获取协议。
- 100 BASE T（FastEthernet）使用4b / 5b编码的组合来防止1s或0s串导致丢失定时和MLT-3信令以允许相同信息以较慢频率传播。
洛杉矶也许能够抓住这个，但我不知道有谁尝试过。
您可能需要SE和PDK。
- 1000 BASE T（千兆以太网）使用8b4qt的组合（这是8位，分为4个参数信号，每个信号携带2位），以及PAM5信号（5电压电平信号，有效地导致每个信号的转换和
4种可能的状态，信令2位）。
由于种种原因，洛杉矶根本无法捕捉到这一点。
如果您可以访问符号，当它们被传递到系统时，LA可能能够捕获数据，最好是在状态模式下，并且可能有一个PDK工具将执行协议解码。
要使用SE或PDK，您需要购买相应的许可证。
虽然可能使用LA来查看以太网协议，但它绝对不是正确使用的工具。
人



     以下为原文

  I'm not sure that you know what you are asking for, and it's probably not available. There are much better tools for looking at this

"Ethernet" is a serial standard, and in normal usage, that means either 10BaseT, 100BaseT or 1000BaseT, and they are very different at the physical layer. Unless you have access to the "parallel" side of the network Interface, the LA can't do anything with it:

- 10 BASE T is Manchester encoding - Basically, this means that each symbol is either a transition in the middle of the bit time from a 0 to +v (a 1) or a transition in the middle of the bit time from +v to 0 (a 0). The LA can probably capture this, in Timing mode, but then you would have to use the Signal Extractor (SE) tool to convert it to symbols, then the Protocol Development Kit (PDK) to get to the Protocol.
- 100 BASE T (FastEthernet) uses a combination of 4b/5b encoding to prevent a string of 1s or 0s from causing a loss of timing and MLT-3 signalling to allow the same information to travel at a slower frequency. The LA may be able to capture this, but I don't know anyone who has tried. You would probably need both SE and PDK.
- 1000 BASE T (Gigabit Ethernet) uses a combination of 8b4qt (this is 8 bits, separated onto 4 quernary signals that carry 2 bits each), and PAM5 signaling (a 5 voltage-level signal that effectively causes a transition at each signal and 4 possible states, signalling 2 bits). The LA can't capture this at all, for a number of reasons.

If you have access to the symbols, as they get passed on to the system, the LA might be able to capture the data, preferably in State mode, and there might be a PDK tool that will do Protocol Decode.

To use either SE or PDK, you would need to purchase the appropriate licenses.

While it MIGHT be possible to use the LA to look at Ethernet Protocol, it is definitely not the right tool to be using.

Al