Functional Details; Pci-2517 Block Diagram; Synchronous I/O - Mixing Analog, Digital, And Counter Scanning - Measurement Computing PCI-2517 User Manual

Functional Details

This chapter contains detailed information on all of the features available from the board, including:
a block diagram of board functions

information on how to use the signals generated by the board

diagrams of signals using default or conventional board settings


PCI-2517 block diagram

Figure 3 is a simplified block diagram of the PCI-2517. This board provides all of the functional elements
shown in the figure.
Synchronous I/O – mixing analog, digital, and counter scanning
The PCI-2517 can read analog, digital, and counter inputs, while generating up to four analog outputs and
digital pattern outputs at the same time. Digital and counter inputs do not affect the overall A/D rate because
these inputs use no time slot in the scanning sequencer.
For example, one analog input channel can be scanned at the full 1 MHz A/D rate along with digital and counter
input channels. Each analog channel can have a different gain, and counter and digital channels do not need
additional scanning bandwidth as long as there is at least one analog channel in the scan group.
Digital input channel sampling is not done during the "dead time" of the scan period where no analog sampling
is being done either.
The ability to scan digital and counter channels along with analog channels provides for a more deterministic
collection of data.
Figure 3. PCI-2517 functional block diagram
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Chapter 3