Agilent Technologies 1670E Series, User Manual

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Using the Oscilloscope
Oscilloscope Common Menus
Displaying the waveform. When the autoscale algorithm is
complete, the oscilloscope automatically starts running, acquires the
data, and displays waveforms for the inputs that have been selected.
The trigger point on the waveform is determined by the trigger level
set by the autoscale algorithm. The trigger point is displayed as a
dotted vertical line at the center of the screen (Delay = 0 s).
What the Autoscale algorithm does when a signal is not found .
If no signal is found, the autoscale algorithm toggles the Auto-Trig field
to On, which places the oscilloscope in the automatic trigger mode.
The oscilloscope then displays the message "Auto triggered." The
automatic trigger mode allows the oscilloscope to sweep automatically
and to display a baseline anytime a trigger signal is not present. All
other settings are restored to their original values.
Menus and fields changed by the Autoscale algorithm
The following table shows the menus and their fields that are changed
by the autoscale algorithm.
Settings Changed by Autoscale
Menu Field Autoscale
Channel V/Div
Offset Scaled - depending on amplitude of input signal.
Scaled - depending on offset of input signal.
Trigger Mode
Source
Level
Slope
Count
Auto-Trig Defaults to Edge.
Set to lowest numbered channel with signal present.
Scaled - depending on amplitude of lowest numbered channel with signal present.
Defaults to Positive.
Defaults to 1.
Defaults to On.
All Applicable s/Div
Delay Scaled - depending on frequency of lowest numbered channel with signal present.
Defaults to 0 s.