Data Translation DT9800 Series, Руководство пользователя

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Chapter 4
90
Set Up Channel List and Channel Parameters
For A/D subsystems only, specify the
values of the digital channel list with
olDaSetDigitalIOListEntry
.
The default is 1. The maximum size is 32.
For the single-ended and pseudo-differential
configuration, channels 0 to 15 are available; for
the differential configuration, channels 0 to 7 are
available. To achieve continuous digital input, enter
the digital input channel as channel 16 in the
analog input channel list.
For A/D operations on all modules except the
DT9805 and DT9806, use a gain of 1, 2, 4, or 8.
For A/D operations on the DT9805 and DT9806,
use a gain of 1, 10, 100, or 500. Use a gain of 1
(the default) if you use digital channel 16 and for all
other operations.
Specify the size of the A/D channel list
and gain list using
olDaSetChannelListSize
.
Set up the channel-gain list using
olDaSetChannelListEntry .
Specify the gain for each channel in
the channel-gain list using
olDaSetGainListEntry .
For A/D subsystems only, enable or disable
(the default) a synchronous digital output
operation with
olDaSetSynchronousDigitalIOUsage .
Values range from 0 (the default) to 1. As each
entry of the analog channel list is sampled, the
value of the corresponding entry in the digital list
is output to the dynamic digital output line.
If you want to output data to the dynamic digital
output line, enable synchronous digital output
operation.