Philips PM3219/01 Gebrauchsanleitung Seite 41

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3.4.3.6.
3.4.3.7,
Composite triggering offers three advantages:
3. In the alternate mode, it is possible to compare signals that are not time-related.
Note:
Using the delayed time-base
The DTB can be used for the accurate study of complex signals.
Time-base magnifier