Triggering can be done in frequency domain (e.g. scanning a certain span) or in time domain (e.g. with zero span). Triggering in frequency domain can be slow due to the time required to scan the frequency span.
- AUTO is the normal spectrum analyzer scanning mode, triggering is not active.
- NORMAL will display a new scan as soon as a signal in the scan causes a trigger event.
- SINGLE will wait for a signal to cause a trigger event and display the scan. Restart the waiting for an event by activating SINGLE again.
- TRIGGER LEV activates a keypad for entering the trigger level. The specified trigger level will be shown in the status panel and as a blue line
- UP EDGE generates a trigger event when the input level goes from below the set trigger level to above the set trigger level
- DOWN EDGE generates a trigger event when the input level goes from above the set trigger level to below the set trigger level
- PRE|MID|POST TRIGGER is a three value toggle setting allowing to place the trigger position at the start, middle or end of the scan. When using MID or POST trigger you can capture and display the signal before the trigger event happened
- BACK returns to the Level menu
The active trigger level is shown on the screen as a blue line and in the status at the left. The trigger level in the status is shown in red when waiting for the trigger to happen and in green when a single trigger happened
