Reference
Bottom Side Description
Runt Occurs
Triggers the o
scilloscope when any runt pulse is detected, regardless
of width.
Runt Width < N
Runt Width > N
Triggers the o
scilloscope when the runt signal pulse width is less than or
greater than the specified pulse width N.
Runt Width = N
Trigger When
Runt Width ≠
N
Triggers the oscilloscope when the runt signal pulse width is equal to or
not equal to the specified pulse width N within a ±5% tolerance.
High N
Low N
Sets the run
t signal high threshold and low threshold voltage levels to
value N, using the general purpose knob.
Set to TTL Sets runt signal threshold voltage levels to 2.0 V (high threshold) and
0.8 V (low threshold).
Thresholds
Set to ECL Sets runt signal threshold v oltage levels to -1.1 V (high threshold) and
-1.5 V (lo
w threshold).
Mode & Ho
ldoff
The tabl
e on Edge triggering includes a description of this menu item.
(See page 94.)
Key Points
Trigger When. The source runt pulse width must be ≥5 n s in order for the
oscill
oscope to detect the pulse.
Slew Rate Trigger
Slew-rate triggering triggers the oscilloscope when a signal's slew rate (rise or
fall time) is less than, greater than, equal to, or not equal to a specified slew rate.
This t
rigger is useful for troubleshooting digital bus transceivers, transmission
lines, and op-amp circuits.
TDS3000C Series Oscilloscope User Manual 105
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