Excitation Jumpers; Table 2-5. Filter Jumper Allocation - National Instruments SCXI-1121 User Manual

Input Channel
Number
0
1
2
3
© National Instruments Corporation
Filter Jumpers
Two-stage filtering is also available on your SCXI-1121 module. The first
stage is located in the isolated section of the input channel, whereas the
second stage is located in the nonisolated section of the input channel. This
permits a higher signal-to-noise ratio by eliminating the noise generated by
the isolation amplifier. Furthermore, two filter bandwidths are
available—10 kHz and 4 Hz.

Table 2-5. Filter Jumper Allocation

First Filter Jumper
4 Hz
(Factory Setting)
W5-A
W21-A
W31-A
W43-A
Your SCXI-1121 is shipped in the 4 Hz configuration. Always make sure
to set both stages to the same bandwidth. This will ensure that the required
bandwidth is achieved.

Excitation Jumpers

Current and Voltage Excitation Jumpers
You can configure each excitation channel of your SCXI-1121 to either a
Voltage or Current excitation mode. Each channel has two jumpers for this
purpose. Set both jumpers in the same mode for correct operation of the
excitation channel. Refer to Table 2-6 for setting up your module in the
mode you want. Your SCXI-1121 is shipped to you in the Voltage mode.
Chapter 2
Second Filter Jumper
10 kHz (Factory Setting)
W5-B
W21-B
W31-B
W43-B
2-9
Configuration and Installation
4 Hz
10kHz
W6 W7
W8 W9
W10 W11
W12 W13
SCXI-1121 User Manual