HP 54540 Series - Control

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Frant-Panel Overview
Control
Control
The area of the front-panel marked Control is located at the top of the
oscilloscope and to the right of the display.
Autoscale Key
Pressing the Autoscale key causes the oscilloscope to quickly analyze the
signal. Then, it sets up the vertical, horizontal, and trigger to best display
that signal. The autoscale function can find repetitive signals with a
‘requency greater than or equal to 50 Hz, a duty cycle greater than one
percent, and an amplitude of 50 mV p-p or greater.
The Autoscale function looks for signals on all channels, even if they are
urned off. On two-channel models, the scope looks for a trigger signal on
he external trigger input; then, it consecutively looks at the channel inputs
starting with channel 1. The scope consecutively looks for a trigger signal at
he channel inputs starting with channel 1.
When the Autoscale key is pressed, the following conditions are set:
e Vertical sensitivity — To best display signals on active channels
e Vertical offset — To best display signals on active channels
e Trigger — Edge mode, positive slope, and trigger level on the found source
e@ Display — To minimum persistence when in normal display and repetitive
acquisition modes (single persistence in real-time acquisition mode)
e@ Time base delay ~- 0.0 seconds
e Time base reference — Center
e Time per division — To best display the signal
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