Chapter 4
Connecting the Signals
4-16
ni.com
Differential Connections for Ground-Referenced
Signal Sources
Figure 4-7 shows how to connect a ground-referenced signal source to
a channel on the NI 6052E configured in DIFF mode.
Figure 4-7.
Differential Input Connections for Ground-Referenced Signals
With this type of connection, the PGIA rejects both the common-mode
noise in the signal and the ground potential difference between the signal
source and the device ground, shown as V
cm
in Figure 4-7.
Selected Channel in DIFF Configuration
PGIA
–
+
–
+
–
+
–
+
V
cm
V
s
Ground-
Referenced
Signal
Source
Common-
Mode
Noise and
Ground
Potential
I/O Connector
AIGND
AISENSE
Input Multiplexers
V
m
Measured
Voltage
Instrumentation
Amplifier
ACH+
ACH–
