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The Channel Menu
Preset Field
Preset Field
When you touch the Preset field, a pop-up menu appears. TTL, ECL, and
User are the options available. 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.
Preset Field Values
When you select TTL or ECL, the parameters are preset to the values shown
in the following table:
Preset Values
Parameter
V/Div
Offset
Trigger Level
When any of the ECL or TTL preset values are changed from the preset
values listed above, the Preset field will change to User and the new values
become the new User values. The User values remain the same until you
manually change the User values or you change the ECL or TTL preset
values while in ECL or TTL Preset.
The default value for the Preset field is TTL.
3-8
ECL
500 mV
-1.300 V
-1.300 V
TTL
1.5 V
2.5 V
1.620 V
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