Chapter 7 Protocol Decoding RIGOL
DS4000E User’s Guide 7-27
FlexRay Decoding (Option)
FlexRay is a differential serial bus configured with three continuous segments
(packet header, payload and packet end). Its frame format is as shown in Figure 5-7
.
The oscilloscope samples the FlexRay signal on the specified sample position and
judges each data point (logic “1” or logic “0”) according to the preset threshold level.
You need to specify the signal type and signal rate for FlexRay decoding.
Press Decode1 Decode, turn the multi-function knob to select “FlexRay”
and press the knob. You can also press Decode continuously to switch to “FlexRay”.
1. Turn on or off the Decode1
Press BusStatus to turn the Decode1 bus display on or off. You can also press
Decode1 to switch the current on/off status of the Decode1 display. When the
bus display is turned on, the interface is as shown in Figure 7-7.
2. Quickly apply the current FlexRay trigger setting to FlexRay decoding
If the current trigger type of the trigger system is FlexRay, press CopyTrig to
copy the current source channel and signal rate in FlexRay trigger and apply
them to the FlexRay decoding function. The threshold level setting will also be
copied.
Note: The copy function is only available when the current trigger type is
“FlexRay”; otherwise, CopyTrig is not available.
Tip
When the current trigger type is “FlexRay”, performing the copy operation at any
time can quickly apply the current FlexRay trigger setting (the specified
parameters) to FlexRay decoding. Then, you can still set the FlexRay decoding
parameters according to the introductions below.
3. Set the source channel
Press Source; turn the multi-function knob to select the desired source
channel and press the knob. You can also press Source continuously to switch
the current source channel. You can select CH1 to CH4.
When a channel (CH1 to CH4) is selected, you can press Threshold and turn
the multi-function knob
to adjust the threshold (the default is 0 V) of the
source channel. Pressing the multi-function knob
can quickly reset the
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