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HOW TO USE THE INSTRUMENT 4 - 37
TRIGGER MODE ROLL
- Press the ANALOG key to select the digital mode.
- Press the TB Mode key to enter the TB mode menu
The TB MODE menu is extended with extensive timebase modes. The
differences are as follows:
• A Roll mode
• Selection of ’Real-time only’
• Delay by events
• Selection of Acquisition length
- Press the softkey next to the ’ROLL on off’ function to select ’on’.
The ’ROLL on’ function is now intensified.
Observe that the timebase is automatically set to 200 ms. The trace moves from
the right to the left.
- Press the ’STOP ON TRIGGER’ softkey to select ’yes’.
The trace stops when the trigger (in this case the start of the first period) reaches
the left of the screen.
Using the roll mode, you can monitor signals like temperature changes and
chemical processes at low timebase speeds. In this mode the scope operates like
a four-pen plotter. Over 36 hours of events can be recorded in memory and
plotted later.
Unlike a paper and pen plotter, the scope can record glitches as narrow as 5 ns,
and the record can be stopped when a trigger condition is met.