Measurement-computing PCI-DAS6013 Uživatelský manuál stáhnout pdf (Strana 25)

PCI-DAS6013 and PCI-DAS6014 User's Guide Functional Details

Rising Edge Polarity

= 37.5 ns minimum

Falling Edge Polarity

Figure 17. D/A START TRIGGER input signal timing

= 50 ns

Figure 18. D/A START TRIGGER output signal timing

D/A CONVERT signal

The D/A CONVERT signal causes a single output update on the D/A converters. You can program any AUXIN

pin to accept the D/A CONVERT signal. It is also available as an output on any AUXOUT pin.

The D/A CONVERT input signal polarity is software selectable. DAC outputs update within 100ns of the

selected edge. The D/A CONVERT pulses should be no less than 100 µs apart.

When used as an output, the D/A CONVERT signal may be used to monitor the pacing of the output updates.

The output has a pulse width of 225 ns with selectable polarity.

The following figures show the input and output timing requirements for the D/A CONVERT signal.

Rising Edge Polarity

= 37.5 ns minimum

Falling Edge Polarity

Figure 19. D/A CONVERT input signal timing

= 225 ns

Figure 20. D/A CONVERT output signal timing

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 41 42

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Measurement-computing PCI-DAS6013 Uživatelský manuál Strana 25