Teledyne LeCroy FlexRay Trigger, Decode and Physical Layer Test - Manual (Page 11)

O PERATOR ’ S M ANUAL
FlexRay-TDP-OM-E Rev A
11
Cycle Count – The Cycle Count is combined with the Frame ID to
enable powerful FlexRay triggering.
The Cycle Count is a decimal value between 0 and 63 and correlates
to the FlexRay Cycle Count numbering system. The default Value is
Cycle Count 0. If the cycle count is not intended to be part of the
Frame triggering, the condition can be set differently to accommodate
such scenarios. Possible conditions are <=, <, =, >, >=, not =, In Range
of, or Out of Range. The default setting is Equal.
If Cycle Count condition is In Range of or Out of Range, a To value
must also be given to specify the full ID range for the trigger.
If the Cycle Count condition is set to Equal the Repetition Factor can
be set to a value of 1, 2, 4, 8, 16, 32 or 64 to allow for triggering when
Cycle multiplexing is being used.
Condition – The condition for Frame ID and Cycle Count can be set
many different ways. Possible conditions are <=, <, =, >, >=, not =, in a
range, out of a range, or don’t care.
Frame Qualifiers – The final aspect of Frame trigger setup is the
Frame Qualifiers which are defined in the FlexRay specification. Frame
Qualifiers provide an additional level of complexity for creating powerful
FlexRay triggers. The default setting for each of the Qualifiers is Don’t
Care; each can be set to One, Zero or Don’t Care as independent
variables in the trigger setup.
Symbol Trigger Setup
If Symbol is selected as the trigger type, then this set of checkboxes is
shown. The FlexRay specification calls out several symbols included in
the FlexRay protocol. The symbol trigger allows for triggering on any
Frame that includes one or more of these symbols.
• Channel Idle Delimiter (CID)
• Collision Avoidance Symbol (CAS) Media Access Test Symbol
(MTS)
• Wakeup Pattern (WUP)
Check or uncheck to include or exclude Symbols as desired. Selecting
more than one symbol sets the oscilloscope to trigger on any of the
Symbols selected.