General-Purpose Application Examples
THS710A, THS720A, THS730A & THS720P User Manual
2–25
Setup to Find Missing Data Pulse
S
PE
AUTO
RANGE
— —
E
Trigger Type Pulse
ME
Trigger
Source
Ch1
Polarity and
Width
Negative Set width to
1 ms
Trigger When Greater Than
Width
Mode Normal
The TekScope instrument triggers if the signal remains in the low
state longer than 1 ms. If it does, you have found an occurrence of a
missing pulse.
Going Further
You can extend this application in several ways:
H If the pulses are supposed to be periodic (1 ms period) and you
suspect an occasional extra pulse, change the width setting to
980 s and the Trigger When submenu to Less Than Width.
With this setup, TekScope instrument triggers if the spacing
between the pulses ever drops below 980 ms, which indicates an
occurrence of an extra pulse.
H Use the second channel to find the cause of the problem. You
can correlate the cause and the effect because the TekScope
instrument always acquires both channels at exactly the
same time.
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