HP 54540 Series - To Change Horizontal Scale; To Modify the Edge Trigger Level; To Pan and Zoom Ona Signal

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Operating the Oscilloscope
To change horizontal scale
To change horizontal scale
Turn the large knob in the Horizontal area of the front panel and notice the changes
to the signal and to the s/div setting under the graticule.
Tur the small knob, labeled Delay, and notice that the signal moves left or right on
the display.
To modify the edge trigger level
Pressthe setup key in the Trigger area of the front panel. Notice the Edge
Trigger menu on the display.
Turn the Level knob in the Trigger area of the front panel and notice that the trigger
level value changes in the menu area and the trigger cursor moves to indicate the
new level.
To pan and zoom on a signal
Press Recall, Clear ,and Autoscale .
This will return the instrument to a known starting condition and provide a scaled signal.
Press the setup key in the Horizontal area to bring up the menu.
Press the record length softkey near the bottom of the menu.
Notice that the value is now highlighted.
Turn the large knob in the Entry/Measure area to set the record length to 4096.
The reason for doing this now is to provide a longer signal record length to view for this
exercise. You can select any value between 512 and 32K, but 4096 will provide a record
length adequate to show how to pan and zoom.
Press the Stop/Single key to stop signal acquisition.
Turn the large knob in the Horizontal area to zoom in and out on the signal.
Turn the small knob in the Horizontal area to pan along the signal
If you look at the top of the display, you will see a bar called the memory bar. In the real-time
mode, the entire length of the memory bar represents the data record the instrument has
captured. The bolded part of the bar represents the part of the data record that is displayed
on the instrument. The indicator on the memory bar represents the trigger point. Note the
actions on the memory bar as you pan and zoom on the signal.