Measurement-computing USB-1608HS Manual do Utilizador descarregar pdf (Página 21)

USB-1608HS User's Guide Functional Details

21

Trigger above, edge-sensitive

The acquisition begins the first time the TRIG_IN signal goes above the high threshold (1.0 V). The TRIG_IN

signal must transition from below to above the high threshold to begin the acquisition.

Figure 13. Trigger above, edge-sensitive

Trigger below, edge-sensitive

The acquisition begins when TRIG_IN signal first goes below the low threshold (-1.0 V). A transition from

above to below the threshold is necessary to begin acquisition. The TRIG_IN signal must transition from above

to below the low threshold to begin the acquisition.

Figure 14. Trigger below, edge-sensitive

Low threshold

Acquired data

+2

-2

+1

0

-1

+2

-2

+1

0

-1

Trigger occurs here

Acquired data

High threshold

Trigger occurs here

+2

-2

+1

0

-1

+2

-2

+1

0

-1

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