Measurement-computing PCI-DAS6023 Manuale Utente Scaricare il pdf (Pagina 37)

PCI-DAS6023 and PCI-DAS6025 User's Guide Specifications

Counters

Table 18. Counter specifications

User counter type

82C54

Number of channels

Resolution

16-bits

Compatibility

5 V/TTL

CTRn base clock source (software selectable)

Internal 10 MHz, Internal 100 KHz or external connector (CTRn CLK)

Internal 10 MHz clock source stability

50 ppm

Counter n gate

Available at connector (CTRn GATE).

Counter n output

Available at connector (CTRn OUT).

Clock input frequency

10 MHz max

High pulse width (clock input)

15 ns min

Low pulse width (clock input)

25 ns min

Gate width high

25 ns min

Gate width low

25 ns min

Input low voltage

0.8 V max

Input high voltage

2.0 V min

Output low voltage

0.4 V max

Output high voltage

3.0 V min

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Measurement-computing PCI-DAS6023 Manuale Utente Pagina 37