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Edge Triggering
Reference
3Ć34
Slope
To select the slope that the edge trigger will occur on:
1. Press the TRIGGER MENU ➞ Type (main) ➞ Edge (popĆup) ➞
Slope (main).
2. Alternatives for slope are the rising and falling edges.
Level
Press the TRIGGER MENU ➞ Type (main) ➞ Edge (popĆup) ➞
Level (main) ➞ Level, Set to TTL, Set to ECL,orSet to 50% (side).
H Level lets you enter the trigger level using the general purpose knob or
the keypad.
H Set to TTL fixes the trigger level at +1.4ĂV.
H Set to ECL fixes the trigger level at -1.3ĂV.
NOTE
When you set the volts/div smaller than 200ĂmV, the oscilloscope
reduces the Set to TTL or Set to ECL trigger levels below standard
TTL and ECL levels. That happens because the trigger level range
is fixed at ±12 divisions from the center. At 100ĂmV (the next smallĆ
er setting after 200ĂmV) the trigger range is ±1.2ĂV, which is smaller
than the typical TTL (+1.4ĂV) or ECL (-1.3ĂV) level.
H Set to 50% fixes the trigger level to approximately 50% of the peakĆtoĆ
peak value of the trigger source signal.