Agilent Technologies 81104A - The Trigger-Level Screen; EXT-IN Parameter

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The Trigger-Level Screen
Use the Trigger-Level screen to:

Set the triggering threshold and input impedance for the EXT INPUT
connector.

Set the triggering threshold and input impedance for the CLK IN
connector.

Set the output levels for the STROBE OUT and TRIGGER OUT
connectors.
To access the Trigger-Level screen, press the TRG-LEV softkey. If the
softkey is not displayed, press MORE.
EXT-IN Parameter
Move the entry focus to EXT-IN to quickly set the triggering threshold of
the external input connector (EXT INPUT) to a TTL or ECL compatible
level.

S
ET
TTL
Set the EXT INPUT threshold to +2.5V.
To adjust the threshold, you can move the entry focus to the value.

S
ET
ECL
Set the EXT INPUT threshold to 1.3V.
To adjust the threshold, you can move the entry focus to the value.