2 analog input channel, 1 analog input front-end configuration, Analog input channel – ADLINK PXI-9527 User Manual
Page 32: Analog input front-end configuration, Figure 3-1, Analog input architecture of the pxi-9527, Table 3-1: input configurations
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Operations
3.2 Analog Input Channel
3.2.1
Analog Input Front-End Configuration
Figure 3-1: Analog Input Architecture of the PXI-9527
Differential and Pseudo-Differential Input Configuration
The PXC-9527 provides both differential and psuedo-differen-
tial input configurations. The differential input mode provides
voltage to the anode and cathode inputs of the BNC connector
according to signal voltage difference between them. If the sig-
nal source is ground-referenced, the differential input mode
can be used for common-mode noise rejection.
If the signal source is a floating signal, pseudo-differential input
mode will provide a reference ground connected to the cathode
input of the BNC through a 50 Ω resistor. This will prevent the
floating source from drifting over the input common-mode
range.
The recommended configurations for the signal sources are as
follows..
Signal Source Type
Card Configuration
Floating Pseudo
differential
Ground-Reference
Differential
Table 3-1: Input Configurations