User`s guide

I/O Driver Blocks

4-27

Input vector with single-ended analog — Now, assume your DAS-1601

board is configured to be single-ended analog input. In this case, 16 analog

input channels are supported. The complete input vector is

[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16] or [1:16]

To use the first four single-ended analog input channels, enter

[1 2 3 4] or [1:4]

This illustration shows the resulting block diagram.

We do not recommend specifying more channels than you actually use in your

block diagram. This results in additional overhead for the processor with A/D

or D/A conversions. In this case, for example, even though some channels are

not actually used in the block diagram, these channels are still converted.

You could attach terminator blocks to channels 4 and 5 inside your block

diagram after passing the Analog Input block vector in to a Demux block.

Adding terminator blocks provides you with graphical information in your

block diagram to clearly indicate which channels you connected and which are

available. The penalty is that even the terminated channels are converted,

adding some computational overhead.

Channel