80 N9310A User’s Guide
4Key Reference
EXT This softkey is one of the choices in both the Sweep Trigger
and the Point Trigger submenu. Selecting EXT allows the
external trigger source come in and triggers a sweep or each
point in a sweep. The external trigger source should be a
TTL signal with 100 ns minimum level holding time.
The signal generator also allows you to set the slope of the
external trigger source by pressing Trigger In softkey: on either
the negative or the positive edge of the TTL signal.
• Key sequence: > Sweep Trigger > EXT
> Point Trigger > EXT
Trig g er In
Pos/Neg
Pressing this softkey toggles the slope of the TTL between
positive and negative. This softkey is available only when the
EXT is selected.
• Default value: Neg
• Softkey sequence: > Trigger In
Sweep Direction
Up /Down
This softkey changes the direction of sweep. Choose Up to
sweep from the start frequency/amplitude to the stop
frequency/amplitude. Choose Down
to reverse the direction of
sweep.
• Default value: Up
• Key sequence: > Sweep Direction
Trigger
Pressing hardkey triggers an armed sweep or each point
in a sweep. It is active only when you set either the sweep
trigger or the point trigger to Key.
Sweep
Sweep
Sweep
Sweep
Tr i g g e r
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