Keysight Technologies C Series - Page 198

198 Keysight N9915-90020 User’s Guide
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE
SA Mode Settings
Sync
Selects the type of signal the periodic trigger is synchronized.
— None No synchronization is selected for a Periodic trigger.
—
External A sweep is triggered on an external TTL signal at the Ref In/Trig In
connector on the FieldFox top panel. Choose to trigger on the rising slope
at about 1.7 V or on the falling slope at about 1.0 V using the Trigger Slope
setting (below).
—
RF Burst uses an alignment process which is performed in the background
to set the detected signal level accuracy. Learn more in
“RF Burst
Amplitude Alignment” on page 211
.
—
1 PPS GNSS Periodic trigger is synchronized to a 1 pulse per second GNSS
signal.
Trigger Slope
Trigger Slope determines which edge of an External, Video, or RF Burst trigger
signal initiates a sweep.
1. Press Sweep 3
> Trigger Settings > Trig Slope
2. Then choose from the following:
—
Pos Sweep is triggered by the rising (positive) edge of signal.
—
Neg Sweep is triggered by the falling (negative) edge of signal.
Trigger Delay
After a valid trigger signal is received, the sweep begins after the specified
Trigger Delay time.
To see the rising edge of a repetitive signal which is triggered on that edge,
enter a negative trigger delay value (also known as pre-trigger). Adjust the
sweep time to observe the pre-trigger time if necessary.
1. Press Sweep 3
> Trigger Settings > Trig Delay
This softkey is ONLY available when Trigger Type is set to Periodic. SA
STEP sweeps do not have trigger behavior. So, they are essentially always
in “FREERUN" mode. If you try to set a trigger (other than FREERUN) in SA
Step sweep, the FieldFox displays the following popup message:
"Note: Trig Type has no effect while in STEP sweep mode"
This softkey is unavailable when Trigger Type is set to Periodic.