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Triggering the Oscilloscope
Source Selection
Click or tap the drop-down button of Source to select CH1-CH4. For details, refer to
descriptions in
information label at the top of the screen.
Only when you select the channel that has signal inputs as the trigger source, can you
obtain a stable trigger.
Baud Rate
Set the baud rate of the signal. Click or tap the drop-down button Baud to select a
FlexRay baud rate that matches the FlexRay bus signal. The available baud rates
include 2.5 Mbps, 5 Mbps, and 10 Mbps.
Trigger Condition
Click or tap the drop-down button of When to select the desired trigger condition.
•
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.
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•
Symbol: triggers on the CAS/MTS (Collision Avoidance Symbol/Media Access
Test Symbol) and WUS (Wakeup Signal) of FlexRay bus.
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HDO4000 User Guide
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Trigger Source
. The current trigger source is displayed in the trigger
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, click or tap the
input field of Count Min or Count Max, then set the number of cycles with
the pop-up numeric keypad.
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, click or tap the input field of ID
Max or ID Min, then use the numeric keypad to set the frame ID.
Click or tap the drop-down button of Symbol to select the symbol type.
The symbol type includes CAS/MTS and WUS.
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