Rigol MSO8000 Series, Руководство пользователя

Страница: 265 / 396

Chapter 12 Protocol Decoding
RIGOL
MSO8000 User Guide 12-31
CAN Decoding (Option)
The oscilloscope samples the CAN signal at the specified sample position. The
oscilloscope will also judge each data point (logic "1" or logic "0") according to the
preset threshold level. You need to specify the CAN signal type and sample position
for CAN decoding.
In the decode setting menu, press Decode1
→
Bus Type , then rotate the
multifunction knob to select "CAN". Press down the knob to select it. You
can also press Bus Type continuously or enable the touch screen to select it.
1. Enable or disable the bus
Press Bus Status continuously to enable or disable the decoding function.
2. Quickly apply CAN trigger settings to CAN decoding
Press Copy Trig to copy the CAN trigger settings and apply them to CAN
decoding function (set the corresponding CAN decoding parameters
automatically). For analog channels, the threshold level settings will also be
copied.
3. Set the source and the threshold
⚫
Press Source and rotate the multifunction knob to select the desired
source channel, and then press down the knob to select it. You can also
press Source continuously or enable the touch screen to select it. The
available channels include CH1-CH4 and D0-D15.
⚫
When you select the analog channel (CH1-CH4), press Threshold , then
rotate the multifunction knob or use the pop-up numeric keypad to set
the threshold of the source channel. When you modify the threshold of the
clock channel, a dotted line displaying the current threshold level is
displayed on the screen. The dotted line disappears in about 2 s after you
stop modifying the threshold.
4. Signal setting
Press Settings to enter the signal setting menu.
⚫
Set the signal type
Press Signal and rotate the multifunction knob to select a signal type
that matches the CAN bus signal. Press down the knob to select it. You can
also press Signal continuously or enable the touch screen to select it. The
available signal types include CAN_H, CAN_L, Rx, Tx, and Diff.
➢
CAN_H: indicates the actual CAN_H bus signal.
➢
CAN_L: indicates the actual CAN_L bus signal.
➢
Rx: indicates the Receive signal from the CAN bus transceiver.
➢
Tx: indicates the Transmit signal from the CAN bus transceiver.
➢
Diff: The CAN differential bus signals connected to an analog source
channel by using a differential probe. Connect the probe's positive lead