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Chapter 5 To Trigger the Oscilloscope
Trigger Condition:
Press When, and rotate the multifunction knob
condition, then press down the knob to select it. You can also press When
continuously or enable the touch screen to select it.
Post: triggers on the specified position of the FlexRay bus. Press Post to select
⚫
"TSS End", "FSS_BSS End", "FES End", or "DTS End".
Frame: triggers on the frame of FlexRay bus.
⚫
Press Frame to select the frame type. The types of frames include null,
➢
Sync, Start, and All.
Press More → Define to select "ID" or "Cyc Count".
➢
When you select "ID", set the following parameters: ID Comp, ID Min, and
ID Max. Press More → ID Comp to select the comparison conditions. The
available choices include =, ≠, >, <, ><, <>. Press More → ID Max or
press More → ID Min, then rotate the multifunction knob
pop-up numeric keypad to set the frame ID.
When you select "Cyc Count", set the following parameters: Cyc Comp,
Count Min, and Count Max. Press More → Cyc Comp to select the
comparison conditions. The available choices include =, ≠, >, <, ><, <>.
Press More → Count Max or press More → Count Min, then rotate the
multifunction knob
count.
Symbol: triggers on the CAS/MTS (Collision Avoidance Symbol/Media Access
⚫
Test Symbol) and WUS (Wake Up Symbol) of FlexRay bus.
Press Symbol to select the symbol type. The symbol type includes
➢
CAS/MTS and WUS.
Press More → ID Comp to select the comparison conditions. The available
➢
choices include =, ≠, >, <, ><, <>. Press More → ID Max or press
More → ID Min, then rotate the multifunction knob
numeric keypad to set the frame ID.
Error: triggers when an error occurs to the FlexRay bus.
⚫
Press Error to select the error type. It includes Head CRC Err, Tail CRC Err,
Decode Err, and Random Err.
Note:
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. In addition, when multiple FlexRay errors occur
at the same time, you need to adjust the trigger holdoff so as to view the
specific error.
Trigger Mode:
In the trigger control area (Trigger) on the front panel, press Mode to quickly switch
the current trigger mode. For details, refer to descriptions in "Trigger Mode".
MSO8000 User Guide
or use the pop-up numeric keypad to set the cycle
to select the desired trigger
or use the pop-up
RIGOL
or use the
5-45
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