Keysight Technologies FieldFox A Series, Руководство пользователя

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Keysight N9927-90001 User’s Guide 237
RTSA (Real-Time Spectrum Analyzer) Mode—Option 350 (CPU2 Only)
RTSA Mode Settings
— Then Trigger Settings
— Then Trig Delay
— Enter a value using the numeric keypad, the arrows, or the rotary
knob. (0 to 10 seconds)
— Then select a multiplier key or press Enter . Learn more in “Multiplier
Abbreviations” on page 43 .
Trigger Level
Used with Video and RF Burst triggering, a sweep is initiated when an
incoming signal crosses this level. See also “Scale and Units” on page 228 .
RF Burst Trigger Level uses an alignment process which is performed in the
background to set the detected signal level accuracy. Video Trigger Level is a
comparison done on the time domain signal, before conversion to the spectral
frequency domain. Processing from the time to frequency domain can cause
broadband (e.g., pulsed) signal energy to display at lower power levels than
the peak power levels of the time domain signal. Therefore you may need to
the set trigger level higher than the displayed spectral level.
— Press Sweep 3
— Then Trigger Settings
— Then Trig Level
— Enter a value using the numeric keypad, the arrows, or the rotary
knob. (–210 to 30 dBm)
— Then select a multiplier key or press Enter . Learn more in “Multiplier
Abbreviations” on page 43 .
Auto Trigger Time
While waiting for a valid trigger signal, Wait is annotated in the top left corner
of the FieldFox screen.
If a valid trigger signal is not received before the specified Auto Trig Time, a
sweep will occur automatically.
When Auto Trigger is OFF, the FieldFox does NOT sweep unless a valid trigger
signal is received.
— Press Sweep 3
— Then Trigger Settings
— Then Auto Trigger
— Enter an Auto Trig Time using the numeric keypad. (1 ms to 100 seconds)
— Then select a multiplier key. See
“Multiplier Abbreviations” on page 43 .