HP 1660 Series Service Manual page 117

To test the time measurement accuracy (oscilloscope)
Set up the Trigger menu.
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a a Press the Trigger key.
b b Select the Mode/Arm field, then select Edge.
c c Select the Source field and set it to C1.
d d Move the cursor to the Level field. Set the trigger level to 0 by typing 0 in the
front-panel keyboard, then pressing Select.
e e Select the Slope field and set it to Positive.
Set up the Markers menu.
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a a Press the Marker key.
b b Move the cursor to the T Markers field and press Select. At the pop up menu, select
Auto.
c c Select the X marker, and set it on C1 at Level 50% , Slope Positive, Occur 1 (use the
RPG knob for Occur).
d d Select the O marker, and set it on C1 at Level 50% , Slope Positive, Occur 2 (use the
RPG knob for Occur).
e e Select the Statistics field and set it to On.
f f Select Done.
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