CAN Sniffer on Altera DE2-115 Board

Hi there,

I am trying to implement a CAN sniffer on an Altera DE2-115 evaluation board with the Terrasic AD/DA data conversion card (High Speed Mezzanine Card (HSMC) via SMA. I am using two A/D channels for CAN_H and CAN_L bus signals.

Before testing it with real CAN signals I want to make sure that the connection is right in terms of voltage swing, differential termination and peak-to-peak voltage. If I got it right I expect a voltage swing of about 1 volt on the CAN_H and CAN_L signal, whereas the input characteristics for the data conversion card say something about 0.5V. But I am not sure if I understood it correctly.

Could somebody please verify, unfortunately I am no expert in analog electronics. Any help is highly appreciated.

Regards, Ryo