Single-Ended Input Mode; Non-Referenced Single-Ended Input Mode - Measurement Computing PCI-DAS6013 User Manual

PCI-DAS6013 and PCI-DAS6014 User's Guide

Single-ended input mode

When all channels are configured for single-ended input mode, 16 analog input channels
are available. In this mode, the input signal is referenced to the board's signal ground
(LLGND). The input signal is delivered through two wires:
The wire carrying the signal to be measured connects to CH# IN HI.
The other wire is connected to LLGND.

Non-referenced single-ended input mode

This mode is a compromise between differential and single-ended modes. It offers some
of the advantages of each mode. With non-referenced single-ended mode, you can still
get noise rejection, but not the limited number of channels resulting from a fully
differential configuration. A possible downside is that the external reference input must
be the same for every channel. It is equivalent to configuring the inputs for differential
mode, tying all of the low inputs together, and using that node as the reference input.
When configured for non-referenced single-ended input mode, 16 analog input channels
are available. In this mode, each input signal is referenced to a common reference signal
(AISENSE), and not to the board's ground. The input signal is delivered through three
wires:
The wire carrying the signal to measure connects to CH# IN HI.
The wire carrying the reference signal connects to AISENSE.
The third wire is connected to LLGND.
This mode is useful when the application calls for differential input mode, but the
limitation on channel count prevents it.
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Installing the Board