Tektronix RSA6100A Series, Руководство пользователя

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Controlling the Acquisition of Data > Using Triggers to
Capture Just What You Want > Triggering Event Tab
Source
Source speci fi es the source of the signal to be monitored for a trigger event. The choices available are:
RF Input, Trig In (front), Trig 2 In (rear), Gated, and Line. The Source drop-down list is always visible
on the Event tab.
Type
Type de fi nes the trigger type as Power , Frequency Mask, DPX Density, or Runt. The Type selection
is only present when Source is set to RF Input.
When Type is set to Power, a transition through an adjustable level of the selected source determines
a trigger event.
When Type is set to Frequency Mask, trigger events are de fi ned by where and how the input signal
crosses or fails to cross the edge of the mask.
When Type is set to DPX Density, the amount of time a signal is present at a particular point in the
DPX Spectrum graph de fi nes a trigger event.
When Type is set to Runt, a signal that exceeds a speci fi ed level and then fails to exceed a second
speci fi ed level de fi nes a trigger event.
Source = RF input.
The following table describes the settings for each triggering type available when Source is set to RF Input.
Type speci
fi es whether a Power level, Frequency Mask violation, DPX Density threshold violation, or
Runt signal will de fi ne a trigger event.
Table 5: Trigger types
Event Type Setting Description
Power For the Power setting, if the RF input signal crosses the speci fi ed
level (in the direction set by Slope), a trigger event occurs. A trigger
event does not occur if the power level of the signal simply exceeds
the level setting, there must be a power level transient that crosses
the speci
fi ed level.
Slope The slope control determines whether the spectrum analyzer fi nds
the trigger point on the rising or falling edge of the RF input signal.
Level The Level setting determines the power level that will be recognized
as a trigger event. The Level is indicated in the Amplitude vs Time
and Time Overview displays with a dark cyan colored-line.
RSA6100A Series Real-Time Spectrum Analyzers Help
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