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Front-Panel Key Reference
Trig
Trig
Accesses the menu of keys that allow you to select the sweep mode and
trigger mode of the analyzer.
New sweep starts as soon as possible after the current sweep ends.
Free Run
Key Access:
Activates the trigger condition that allows the next sweep to start if the
Video
detected RF envelope voltage rises to a level set by the video trigger
level. When
triggers when the input signal exceeds the trigger level at the left edge
of the display. You can change the trigger level using the step keys, the
knob, or the numeric keypad
Key Access:
This function is not available when the Resolution Bandwidth is less
NOTE
than 1 kHz. If a Resolution Bandwidth less than 1 kHz is selected while
in Video Trigger mode, the Trigger mode changes to Free Run.
Activates the trigger condition that allows the next sweep to be
Line
synchronized with the next cycle of the line voltage.
Key Access:
Line trigger is not available when operating from a dc power source.
NOTE
Activates the trigger condition that allows the next sweep to start when
External
the external voltage (connected to
Pos Neg
panel) passes through approximately 1.5 volts. The external trigger
signal must be a 0 V to +5 V TTL signal. This function also controls the
trigger polarity (for positive or negative-going signals).
Key Access:
Allows you to set and turn on or off a delay, during which the analyzer
Trig Delay
will wait to begin a sweep after receiving an external trigger signal.
On Off
This function is not available when
External
Key Access:
This function is not available in Free Run or Video Trigger modes.
NOTE
206
Trig
is pressed, a line appears on the display. The analyzer
Video
Trig
Trig
Trig
is selected.
,
Trig
More
GATE TRIG/EXT TRIG IN
is on.
Gate
Trig Delay
on the rear
is active when
Chapter 2
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