Preset Field - Agilent Technologies HP 1660E Series User Manual

Using the Oscilloscope
The Scope Channel Menu

Preset field

When you select the Preset field, a pop-up appears, offering choices of
TTL, ECL, and User. The Preset field automatically sets offset, V/div,
and trigger level values to properly display TTL and ECL logic levels.
Trigger level is in the Trigger menu and can be changed only when
edge trigger is the selected trigger mode.
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