ADLINK DAQe-2006 - Manual (Page 42)

30 Operation Theory
DAQ-/DAQe-/PXI-2010 AI Data Format
Synchronous Digital Inputs (DAQ-/DAQe-/PXI-2010 only)
When each A/D conversion is completed, the 14-bits converted
digital data accompanied with 2 bits of SDI<1..0>_X per chan-
nel from J5 will be latched into the 16-bit register and data
FIFO as shown in Figure 4-1 and Figure 4-2. Therefore, you
can simultaneously sample one analog signal with four digital
signals. The data format of every acquired 16-bit data is as fol-
lows:
D13, D12, D11 ....... D1, D0, b1, b0
Where
D13, D12, D11 ....... D1, D0: 2’s complement A/D
14-bit data
b1, b0: Synchronous Digital Inputs SDI<1..0>
Figure 4-1: Synchronous Digital Inputs Block Diagram
Figure 4-2: Synchronous Digital Inputs Timing