HP 54540 Series - Page 29

Front-Panel Overview
Contrel
Run Key
The Run key causes the oscilloscope to resume acquiring data. If the
oscilloscope is stopped, it starts acquiring data on the next trigger event. If
the oscilloscope is already in the run mode, it continues to acquire data on
successive trigger events.
If pressing the Run key does not cause waveform data to display on the
screen, try the following hints:
e Press the Autoscale key (unless the signal is single-shot).
e Make sure that a signal is connected to one of the channels and that the
display for that channel is turned on.
@ Make sure that the offset does not have the trace clipped off the display.
e Check the trigger setup conditions to make sure that the trigger conditions
are valid for the signal.
e Set the trigger sweep mode to auto. Auto sweep forces the oscilloscope to
trigger, which may allow you to see enough of the signal, so that you can
set up the front panel controls.
Local Key
You can access the Local key by pressing the blue shift key on the keypad,
followed by pressing the Run key. The Local key sets the oscilloscope to
return control to the front panel. This is the only active key when the
oscilloscope is under remote control. The exception occurs when the
controller sends a local lockout command. The local lockout command
prevents the local key from returning control of the oscilloscope to the front
panel.
2-6