HP 54645A User's And Service Manual page 39

Front-Panel Overview
Description of Front-Panel Areas
Front-Panel Areas Description
2-14
Trigger condition shows the current trigger mode. The Auto
Level and Auto trigger modes display the "Auto" indicator.
For Edge trigger mode, it also shows the trigger condition and
channel number.
In normal trigger mode, when the TV trigger mode is selected,
"TV" is displayed; when in Auto level or Auto modes, "TV" is
replaced by the "Auto" indicator. Glitch trigger mode displays a
positive or negative glitch signal next to the channel number.
Pattern trigger mode displays "Pat" and Advanced Pattern
trigger mode displays "Adv".
If the last acquisition was initiated by pressing the Single key,
the letters "Sngl" appear in this position (unless the last single
acquisition was auto triggered).
The acquisition indicator shows the current acquisition
condition, that is, whether the acquisition system is running,
stopped, or in Autostore mode.
When the instrument is in Normal trigger mode, the Trigger
condition indicators flash while the instrument is searching for
the trigger condition, which occurs after the pre-trigger buffer is
full. When the instrument is in Auto trigger mode, the word
"Auto" flashes to the left of the Trigger condition indicator if the
instrument did not find the trigger and was therefore triggered
automatically after a time-out.
When the delayed horizontal mode is selected, a square symbol
appears at the top center of the activity indicator line. The
Time/Div next to this symbol is the delayed sweep s/div value.
When you press the Main/Delayed key, the delay value is
displayed briefly at the bottom of the display.
Applies to Unit:
HP 54645A/D
HP 54645A/D
HP 54645D
HP 54645A/D
HP 54645A/D
HP 54645A/D
HP 54645A/D