Functional Details; Pci-2511 Block Diagram; Synchronous I/O - Mixing Analog, Digital, And Counter Scanning - Measurement Computing PCI-2511 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-2511 block diagram

Figure 3 is a simplified block diagram of the PCI-2511. This board provides all of the functional elements
shown in the figure.
Synchronous I/O – mixing analog, digital, and counter scanning
The PCI-2511 can read analog, digital, and counter inputs, while generating 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-2511 functional block diagram
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Chapter 3