Keysight Technologies FieldFox A Series User Manual page 236

RTSA (Real-Time Spectrum Analyzer) Mode—Option 350 (CPU2 Only)
RTSA Mode Settings
—
If your trigger level is set too high for the current measurement gain setup,
you will see an error message, similar to this one, displayed: "Video
TrigLevel was HW Limited, it is x.xx dB above current capability". Adjust
your trigger level settings until the message is no longer displayed.
—
—
Trigger Slope
Trigger Slope determines which edge of an External, Video, or RF Burst trigger
signal initiates a sweep.
— Press Sweep 3
— Then
— Then
— Then choose from the following:
Trigger Delay
After a valid trigger signal is received, the sweep begins after the specified
Trigger Delay time.
— Press Sweep 3
236
Video A sweep is initiated when the amplitude of an incoming signal
crosses the settable trigger level. The comparison is done in the time
domain, before conversion to frequency domain. Refer to
"Trigger Delay", "Trigger Level" on page
page 237, and to "Trigger Hold-Off" on page
RF Burst A sweep is initiated when the signal at the third IF (analog) stage
crosses the settable Trigger Level. This selection reacts to a wider
bandwidth of the incoming signal than Video Trigger, which could be
beneficial. However, RF Burst is not as sensitive to triggering on low-level
signals. Refer to "Trigger
page 237, "Auto Trigger Time" on page
page 238.
Periodic Trigger repeats at the period rate entered. Periodic trigger's phase
can be altered by the Offset value.
Then choose from the following:
— Period Enter a value for the trigger to repeat (100 ns to 400 ms).
— Offset Enter a offset value to offset the phase of the periodic trigger
(–100 ms to 100 ms).
— Reset Offset Display
Trigger Settings
Trig Slope
— Pos Sweep is triggered by the rising (positive) edge of signal.
— Neg Sweep is triggered by the falling (negative) edge of signal.
237, "Auto Trigger Time" on
238.
Slope", "Trigger Delay",
237, and to
Resets Offset to default 0.000000 s.
Keysight N9927-90001 User's Guide
"Trigger Slope",
"Trigger Level" on
"Trigger Hold-Off" on