hi,
we have recently acquired a 16804A logic analyser.
We are in need of signal extractor for ethernet protocol. Is it available ?
please let me know.
Regards,
Rajesh khanna
we have recently acquired a 16804A logic analyser.
We are in need of signal extractor for ethernet protocol. Is it available ?
please let me know.
Regards,
Rajesh khanna
"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