Hello,
I have a problen trying to communicate a custom board that I had designed with another system. However the CAN signals have not good quality: asymmetry between CANH and CANL and wrong voltage levels. I attach some captures about it.
Figure 1: Schematic of the CAN circuit (the chosen IC is not SN65HVD233MDREP. I had to replace it by XR31233 because it was out of stock).
Figure 2: Measurements with the bus floating (termination of 120 Ohms).
Figure 3: Amplitude of the signals reduced because of I connected both transceivers outputs between them (termination of 60 ohms).
Reflected signals could be a possible reason of this behaviour?
Traces width and gap between them are really relevant variables if the data rate has 1Mbps?
Thank you and regards,
Leandro
