Sequoia / Tahoe Series User Manual California Instruments
252 M447352-01 REV-A
Figure 7-5. Post-Trigger (Positive Delay)
PRE-TRIGGER DELAY Negative trigger delay value may be specified up to the maximum time
depth of the acquisition window. The value may be entered directly
with the touch-screen keypad or using the rotary encoder. The
following time interval range is available: Negative trigger delay, 42.6
ms to 426 ms. This condition is shown in Figure 7-6 where a 20 ms
trigger delay is used after triggering on phase = 0°, with an output
frequency of 50 Hz. The trigger point is indicated by the dashed line; it
occurs on the first degree point that occurs after the START field is
tapped. Once the trigger occurs, the acquisition is captured beginning
from the specified 20 ms before the trigger point. Using a negative
trigger delay value always yields pre-trigger data.
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Figure 7-6. Pre-Trigger (Negative Delay
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