The National Instruments SCXI-1141 is an eight-channel programmable elliptic lowpass filter module for SCXI anti-aliasing applications. It provides a common cutoff setting with independently selectable filter bypass for each channel.
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The SCXI-1141 conditions analog signals using elliptic lowpass filtering ahead of data acquisition. Its software-selectable gain is configured per channel, while the filter cutoff is configured for the module.
NI also documents cascaded configurations that combine SCXI-1120 or SCXI-1121 signal conditioning with SCXI-1141 filtering. These arrangements require the specified cascading cables, DAQ hardware, and software configuration.
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| Differential input channels | 8 channels |
|---|---|
| Filter response | Elliptic lowpass — |
| Programmable cutoff frequency | 10 to 25000 Hz |
| Gain settings | 1, 2, 5, 10, 20, 50, 100; software-selectable per channel V/V |
| Input voltage range | ±5 V |
| Operating modes | Multiplexed and parallel — |
| Cutoff configuration | Shared across all channels — |
| Filter bypass | Software-selectable per channel — |
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Signal-conditioning platform
Programmable lowpass filtering stage
NI documents SCXI-1352 cable assemblies for connecting SCXI-1120 or SCXI-1121 outputs to SCXI-1141 inputs.
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No. All channels share the cutoff frequency, but the lowpass filter can be bypassed independently on each channel.
The supported gains are 1, 2, 5, 10, 20, 50, and 100, selected through software per channel.
Yes. NI documents cascading an SCXI-1120 into the SCXI-1141 using the SCXI-1352 R1650 cable assembly. The DAQ connection, software settings, input ranges, and scaling must follow the documented configuration.