Measurement Computing Personal Daq/3000 Series - Manual (Page 13)

Example 1: Analog channel scanning of voltage inputs
The figure below shows a simple acquisition. The scan is programmed pre-acquisition and is made up of 6
analog channels (Ch0, Ch2, Ch5, Ch11, Ch22, Ch25.) Each of these analog channels can have a different
gain. The acquisition is triggered and the samples stream to the PC via USB2. Each analog channel
requires one microsecond of scan time therefore the scan period can be no shorter than 6 us for this
example. The scan period can be made much longer than 6 us, up to 19 hours. The maximum scan
frequency is one divided by 6us or 166,666 Hz.
Notice that some of the analog channels in the scan group are from a PDQ30 expansion module. All
analog channels are sampled at the same rate of 1us. Analog channels on the PDQ30 can also have any of
the gain ranges applied.
Personal Daq/3000 Series User’s Manual 988093 Daq Systems and Device Overviews 1-5