User`s guide

118 N9320A Spectrum Analyzer
4 Key Reference
Key access:
Free Run New sweep starts as soon as possible after the current
sweep ends.
Key access: > More
Video Activates the trigger condition that starts the next sweep if
the detected RF envelope voltage rises to a level set by the
video trigger level. When Video is pressed, a line appears on
the display. The analyzer triggers when the input signal
exceeds the trigger level at the left edge of the display.
Change the trigger level by using the arrow keys, the knob,
or the numeric keypad.
Key access: > More
External Pos Activates the trigger condition that will start a sweep when
the external voltage (connected to EXT TRG IN on the rear
panel) passes through approximately 2 volts. The external
trigger signal must be a 0 V to +5 V TTL signal. Sets the
trigger polarity to positive.
Key access: > More
External Neg Sets the trigger polarity to negative.
Key access: > More
Trig Offset
On Off
Allows you to set and turn on or off an offset value from
the trigger point of the sweep at which to begin storing data
in the trace of the analyzer. The offset is specified as a
function of time, and permits positive (pre trigger) and
negative (post trigger) values to be specified.
Key Access: > More
Sweep/
Tri g
Sweep/
Tri g
Sweep/
Tri g
NOTE
This function is not available when the Resolution Bandwidth is less
than 1 kHz. Selecting a Resolution Bandwidth less than 1 kHz while in
Video Trigger mode, changes the Trigger mode to Free Run.
Sweep/
Tri g
Sweep/
Tri g
Sweep/
Tri g
NOTE
This function is only available when in Zero Span. The value and state is
saved if Zero Span is exited and restored when Zero Span is reselected.