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Chapter 7 Protocol Decoding
CAN Decoding (Option)
You need to specify the CAN signal type and sample position for CAN decoding. The
oscilloscope samples the CAN signal on the specified sample position.
Press Decode1 Decode and select "CAN" to open the CAN decoding function
menu.
If the current trigger type of the trigger system is CAN, pressing CopyTrig softkey
can copy the current CAN trigger settings (include the source channel, signal type,
baud rate, sample position and so on) and apply them to the CAN decoding function.
Then, if needed, you can still set the CAN decoding parameters according to the
introductions below.
Note: The copy function is only available when the current trigger type is "CAN";
otherwise, CopyTrig is not available.
1. Source
Press Source to select either of the channel (CH1 or CH2) as the source
channel.
At this time, you can set the threshold of the corresponding analog channel.
Press Threshold to open the threshold setting menu. Then, press TTL, CMOS
or ECL to set the threshold of the specified channel to the corresponding level
value; or press Threshold and use
is from (-5*vertical scale - vertical position) to (5*vertical scale - vertical
position). The default is 0 V. Pressing down
level to 0 V.
Note: When the threshold selected is beyond the specified range, it will be
automatically limited within the range.
2. Signal Type
Press Signal Type to select the desired signal type.
Rx: the received signal from the CAN signal line.
Tx: the sending signal from the CAN signal line.
CAN_H: the actual CAN_H bus signal.
CAN_L: the actual CAN_L bus signal.
Differential: the CAN differential bus signals connected to an analog
DS2000E User's Guide
to set the threshold. The settable range
can quickly reset the threshold
RIGOL
7-17
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