Teledyne LeCroy FlexRay Trigger, Decode and Physical Layer Test - Manual (Page 23)

O PERATOR ’ S M ANUAL
Using Cursors
Use horizontal cursors to mark locations on the waveform where the time measurement should be done, then
read the cursor values to establish the measurement. As necessary, adjust the timebase or create zooms of the
decoded trace(s) so as to be able to view the signal with enough detail. This is a good method for single-shot /
single measurements.
Using Measurement Parameters
Measurement parameters can be used to make signal integrity or timing measurements of your serial data
signals. Basic parameters, such as Amplitude, Rise, Fall, Overshoot, etc. are ideal for signal integrity checks.
Timing parameters, such as Delay, Delta Delay, Delta Time @ Level, etc., are ideal for measuring timing from
trigger to other signals (such as from an I
2
C or SPI Trigger to an analog signal). Delta Trig Time is ideal for
measuring the time between segments of a Sequence Mode acquisition (Reference the chapter on Isolating and
Analyzing Serial Bus Activity for more information on Sequence mode).
Amplitude – Noise and overshoot resistant measurement of the
amplitude of the signal (measurement of amplitude from Top to Base).
Base – Value of the lowermost state in a bi-modal waveform
Delay – Time from the trigger to the first transition at the 50%
amplitude crossing.
Delta Delay – Time between the 50% crossing of the first transition of
two waveforms.
Delta Time @ Level – Time between selectable levels of two
waveforms.
Delta Trig Time – The time from last trigger to this trigger (usually
used in Sequence mode).
Fall (90-10), Fall 80-20, Fall@Level – Transition time on the falling
edge. Three selections are available for the user to determine at which
vertical level the measurement is made.
FlexRay-TDP-OM-E Rev A
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