Crest Electronics CDVS-7000 Uživatelský manuál stáhnout pdf (Strana 107)

100

101

User Manual

i Series / iX Series 93

PRE TRIGGER DELAY

Alternatively, a negative trigger delay value may be specified up to the maximum time window

depth of the acquisition window. (104 ms for single phase configurations, 312 ms for three phase

configurations). This situation is shown in Figure 4-38. The example shows a similar scenario as

before, only this time the trigger delay was set a -20 ms. Notice that the data acquisition window

now contains data that occurred before the user pressed the ENTER key to start the acquisition.

START

[ENTER]

TRIG SOURCE=

PHASE 0°

ACQUISITION WINDOW

TRIGGER

DELAY

Figure 4-38: Negative trigger delay (Pre-trigger data)

For single phase iX configurations, negative trigger delay values may be set from 0.0 ms to -

104.0 ms (1 second) in 0.1 ms increments. For three phase iX configurations, the maximum

negative trigger delay value equals -312.0 ms. The value may be entered directly from the

keyboard or using the knob.

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