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PCIE-1816_1816H User Manual
Chapter 3
S
ignal Connections
External AI Sample Clock
The external AI sample clock is useful when you want to pace acquisitions at rates
not available with the internal AI sample clock, or when you want to pace at uneven
intervals. Connect an external AI sample clock to screw terminal AI_CLK on the
screw terminal board. Conversions will start on the rising edge of the external AI
sample clock input signal. You can use software to specify the clock source as exter-
nal. The sampling frequency is always limited to a maximum of 10 MHz for the exter-
nal AI sample clock input signal.
Figure 3.6 External Clock Source Connection
Trigger Sources Connections
External Digital (TTL) Trigger
For analog input operations, an external digital trigger event occurs when the PCIE-
1816/ 1816H detects either a rising or falling edge on the External AI TTL trigger
input signal from screw terminal DTRG0 and DTRG1 on the screw terminal board.
The trigger signal is TTL-compatible.
Figure 3.7 External Digital Trigger Source Connection
Summary of Contents for PCIE-1816
Page 1: ...User Manual PCIE 1816 1816H 16 bit Multi function Card with PCI Express Bus ...
Page 4: ...PCIE 1816_1816H User Manual iv ...
Page 10: ...PCIE 1816_1816H User Manual 4 Figure 1 1 Installation Flow Chart ...
Page 36: ...PCIE 1816_1816H User Manual 30 ...
Page 37: ...Appendix A A Specifications ...
Page 38: ...PCIE 1816_1816H User Manual 32 A 1 Function Block ...
Page 42: ...PCIE 1816_1816H User Manual 36 ...
Page 43: ...Appendix B B Operation Theory ...
Page 61: ...55 PCIE 1816_1816H User Manual Appendix B Operation Theory ...