Signal Generator Overview
Front Panel
Chapter 110
25. PULSE/TRIGGER GATE INPUT (PSG-A only)
This connector accepts an externally supplied TTL-compatible signal for use as a pulse or
trigger input. The damage levels are
±
5 V
rms
and 10 V
p
. The nominal input impedance is 50
Ω
.
26. Arrow Keys
The up and down arrow hardkeys are used to increase or decrease a numeric value, step
through displayed lists, or to select items in a row of a displayed list. Individual digits or
characters may be highlighted using the left and right arrow hardkeys. Once an individual
digit or character is highlighted, its value can be changed using the up and down arrow
hardkeys.
27. Hold Key
This hardkey blanks the softkey label area and text areas on the display. Softkeys, arrow
hardkeys, the knob, the numeric keypad, and the
Incr Set hardkey have no effect once this
hardkey is pressed.
28. Return Key
This hardkey will return you one level back from your current softkey menu level to the
previous softkey menu level. It enables you to step back through the menus until you reach
the first menu you selected.
29. Display Contrast Decrease Key
This hardkey, when pressed or held, causes the display background to darken.
30. Display Contrast Increase Key
This hardkey, when pressed or held, causes the display background to lighten.
31. Local Key
This hardkey is used to deactivate remote operation and return the signal generator to front
panel control.
32. Preset Key
This hardkey is used to set the signal generator to a known state (factory or user-defined).
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