- #1
roTTer
- 18
- 1
I would like to simulate the Physical Layer of the Controller Area Network(ISO 11898) to evaluate the performance of the system under varying conditions(Temperature, Twists/turn, Length, Termination type, Unfitting Node Terminations, Interconnections, Splices, Unbalanced Loading etc.)
I will be quite frank and confess that I do not have a deep-knowledge on the modeling of Transmission Line. That's the reason I am here!
My plan was to model the Shielded Twisted-Pair cable and get the appropriate Transceiver model(TJA1051 from NXP) from the supplier end, and simulate it for a simple 2-node system, and verify the results with an experimental setup, so as to validate the modeling of the Transmission Lines. At a later stage, I can take up complex systems for simulation.
I require help in identifying the necessary documents, papers and books that I can read up on to get this going.I have studied the Specification Sheets of CAN, it's data layer J1939 and other relevant documents.
Though I have few generic doubts that I am listing out below:
1. The necessity of chokes in the network(if yes, the formulas for it?), and also the reasoning behind it?
2. I read somewhere, that CAN is not affected by EMI? External EMI, maybe yes, because of he usage of STP, but what would be the effect of CrossTalk on it?
3. Ballpark figures for acceptable distortions, propagation delay and rise/fall times of the signal for reliable communication?
4. Do the Transceivers(CAN) support Reflected Wave Switching or are they only Incident Wave Switching Drivers?
5. Acceptable limits to the asymmetry in the signals that occur.
6. What do you mean by an Eye Diagram? I checked wiki and there's not much of data there. How do I define an Eye-Diagram for this simulation?
Please do comment if it's the right way to approach this problem and I do welcome any suggestions that you may have regarding this.
PS: This simulation will be for vehicular applications
I will be quite frank and confess that I do not have a deep-knowledge on the modeling of Transmission Line. That's the reason I am here!
My plan was to model the Shielded Twisted-Pair cable and get the appropriate Transceiver model(TJA1051 from NXP) from the supplier end, and simulate it for a simple 2-node system, and verify the results with an experimental setup, so as to validate the modeling of the Transmission Lines. At a later stage, I can take up complex systems for simulation.
I require help in identifying the necessary documents, papers and books that I can read up on to get this going.I have studied the Specification Sheets of CAN, it's data layer J1939 and other relevant documents.
Though I have few generic doubts that I am listing out below:
1. The necessity of chokes in the network(if yes, the formulas for it?), and also the reasoning behind it?
2. I read somewhere, that CAN is not affected by EMI? External EMI, maybe yes, because of he usage of STP, but what would be the effect of CrossTalk on it?
3. Ballpark figures for acceptable distortions, propagation delay and rise/fall times of the signal for reliable communication?
4. Do the Transceivers(CAN) support Reflected Wave Switching or are they only Incident Wave Switching Drivers?
5. Acceptable limits to the asymmetry in the signals that occur.
6. What do you mean by an Eye Diagram? I checked wiki and there's not much of data there. How do I define an Eye-Diagram for this simulation?
Please do comment if it's the right way to approach this problem and I do welcome any suggestions that you may have regarding this.
PS: This simulation will be for vehicular applications
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