Chapter 2 Configuration and Installation
© National Instruments Corporation 2-13 SCXI-1120/D User Manual
Your SCXI-1120 is shipped in the 4 Hz position. Verify that both stages are
set to the same bandwidth to ensure that the required bandwidth is
achieved. Notice that one jumper block is available for each filter stage.
SCXI-1120D Filter Jumpers
Two-stage filtering is also available on your SCXI-1120D 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 your input channel.
Two-stage filtering eliminates the noise generated by the isolation
amplifier, producing a higher signal-to-noise ratio. Furthermore, two filter
bandwidths are available, 22.5 kHz and 4.5 kHz.
Your SCXI-1120D is shipped in the 4.5 kHz position. Verify that both
stages are set to the same bandwidth to ensure that the required bandwidth
is achieved. Notice that one jumper block is available for each filter stage.
Table 2-7.
SCXI-1120D Filter Jumper Allocation
Input
Channel
Number
First
Filter Jumper
Second
Filter Jumper
4.5 kHz
(Factory
Default)
22.5 kHz 22.5 kHz
4.5 kHz
(Factory
Default)
0 W17-A W17-B W25 W26
1 W18-A W18-B W27 W28
2 W19-A W19-B W29 W30
3 W20-A W20-B W31 W32
4 W21-A W21-B W33 W34
5 W22-A W22-B W35 W36
6 W23-A W23-B W37 W38
7 W24-A W24-B W39 W40
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