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Interference Analyzer (Option 25) 3-17 Sweep Menu
Spectrum Analyzer MG PN: 10580-00349 Rev. M 3-77
Trigger Source Menu
Key Sequence:
Shift > Sweep
(
3
) key
> Triggering > Source
Free Run: In this mode, a new sweep is started immediately upon
completion of an old sweep. No trigger event is required to initiate a sweep.
External (TTL): A TTL signal applied to the External Trigger BNC input
connector causes a single sweep. After the sweep is complete, the resultant
trace is displayed until the next trigger signal is received.
Video: This mode uses Video power as the trigger source. The trigger level
is set using the Level key in the “Triggering Menu” . The trigger is based on
the measured signal level. If no signal reaches or exceeds the trigger level,
no trace will be displayed on the screen.
IF Power (MS2720T Only) : This mode uses IF power level as the trigger
source. The power level is set using the Level key in the “Triggering Menu” .
The trigger is based on the measured signal level. If no signal reaches or
exceeds the trigger level, no trace will be displayed on the screen.
Back: Returns to the “Triggering Menu” on page 3-76 .
Figure 3-71. IA Triggering Source Menu
Trigger Source
Back
External (TTL)
Video
Free
Run
IF Power