Source Field; Slope Field - Agilent Technologies HP 1660E Series User Manual

Using the Oscilloscope
The Scope Trigger Menu

Source field

When you select the Source field, a pop-up menu appears showing the
inputs available as the trigger source. The source can be channel 1 or
channel 2.
At power-up, the default channel input selection for the Source field is
the lowest numbered input channel. For example, if inputs are
connected to both channels 1 and 2, the Source field defaults to 1.
However, if an input signal is only connected to channel 2, the Source
field defaults to 2 when you automatically scale with Autoscale, even
though channel 1 is the default at power-up.

Slope field

You can set the trigger slope to trigger on either the positive or
negative edge of the trigger source waveform. When you select the
Slope field, the field toggles between Positive and Negative.
The default selection for the Slope field is Positive.
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