Tektronix TDS 500C, TDS 600B, TDS 700C - page 163

Triggering on Waveforms
3–102 TDS 500C, TDS 600B, & TDS 700C User Manual
Either causes a trigger to occur if the signal stays lower or stays higher than
the trigger level for longer than the timeout value.
Time. To set the timeout time:
1. Press TRIGGER MENU ➞ Type (main) ➞ Pulse (pop-up) ➞
Class (main) ➞ Timeout (pop-up) ➞ Time (main)
2. Turn the general purpose knob or use the keypad to set values for the timeout
time.
Set the Level . Press TRIGGER MENU ➞ Type (main) ➞ Pulse (pop-up) ➞
Class (main) ➞ Timeout (pop-up) ➞ Level (main) ➞ Level, Set to TTL, Set to
ECL, or Set to 50% (side).
If you select Level, you set the trigger level by entering a value with the
general purpose knob or the keypad.
If you select Set to TTL, the oscilloscope sets the trigger level to the TTL
switching threshold.
If you select Set to ECL, the oscilloscope sets the trigger level to the ECL
switching threshold.
If you select Set to 50%, the oscilloscope searches for the point halfway
between the peaks of the trigger source signal and sets the trigger level to
that point.
Set the Mode and Holdoff. Mode and holdoff can be set for all standard trigger
types and classes. To set mode and holdoff, refer to Set Mode & Holdoff on
page 3–75. To learn more about trigger mode and holdoff, see Trigger Modes
and Trigger Holdoff on page 3–65.