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• Post: triggers on the specified position of the FlexRay bus. Select Post as the
trigger condition, and then click or tap its drop-down button to select "TSS End",
"FSS_BSS End", "FES End", or "DTS End".
• Error: triggers when an error occurs to the FlexRay bus. Click or tap the drop-
down button of Error to select the error type. It includes Head CRC Err, Tail CRC
Err, Decode Err, and Random Err.
• Frame: triggers on the frame of FlexRay bus.
- Click or tap the drop-down button of Frame to select the frame type. The
types of frames include null, Syns, Start, and All.
- Select "ID" or "Cyc Count" in Define.
When you select "Cyc Count", set the following parameters: Cyc Comp,
Count Min, and Count Max. Click or tap the drop-down button of Cyc
Comp to select the comparison conditions. The available choices include =,
≠, >, <, <>, and ><. When a certain condition is selected, you can set the
Count Min or Count Max.
When you select "ID", set the following parameters: ID Comp, ID Min, and
ID Max. Click or tap the drop-down button of ID Comp to select the
comparison conditions. The available choices include =, ≠, >, <, <>, and
><. When a certain condition is selected, you can set the ID Max or ID Min.
• Symbol: triggers on the CAS/MTS (Collision Avoidance Symbol/Media Access
Test Symbol) and WUS (Wakeup Signal) of FlexRay bus.
- Click or tap the drop-down button of Symbol to select the symbol type.
The symbol type includes CAS/MTS and WUS.
- Click or tap the drop-down button of ID Comp to select the comparison
conditions. The available choices include =, ≠, >, <, <>, and ><.
As the occurrence possibility of specified FlaxRay frame is very low, it is
recommended that you set the oscilloscope to "Normal" trigger mode when the
trigger condition is set to "Frame" so as to prevent the instrument from triggering
automatically while waiting for the specified frame. The same goes for "Error" trigger
condition.
Trigger Mode
In Sweep, select Auto, Normal, or Single as the trigger mode. For details, refer to
descriptions in
Trigger Mode
.
Trigger Parameter Setting
You can refer to
Noise Rejection
to set the noise rejection under this trigger type.
Triggering the Oscilloscope
DHO4000 User Guide
118
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
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