MIC-1810 User Manual
20
3.8.1
Differential Channel Connections
The differential input channels operate with two signal wires for each channel, and
the voltage difference between both signal wires is measured. On MIC-1810, when
all channels are configured to differential input, up to 8 analog channels are avail
-
able.
If one side of the signal source is connected to a local ground, the signal source is
ground-referenced. Therefore, the ground of the signal source and the ground of the
card will not be exactly of the same voltage. The difference between the ground volt
-
ages forms a common-mode voltage (Vcm ).
To avoid the ground loop noise effect caused by common-mode voltages, you can
connect the signal ground to the Low input. Figure 3.7 shows a differential channel
connection between a ground reference signal source and an input channel on the
MIC-1810. With this connection, the PGIA rejects a common-mode voltage Vcm
between the signal source and the MIC-1810 ground, shown as Vcm in Figure 3.7.
Figure 3.7 Differential input channel connections
Содержание MIC-1810
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Страница 13: ...Chapter 2 2 Hardware Overview ...
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Страница 39: ...Appendix A A Specification ...
Страница 45: ...Appendix B B System Dimensions ...
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Страница 47: ...39 MIC 1810 User Manual Appendix B System Dimensions ...