The SCD-112D-2 is a 12-channel plug-in signal conditioning card for use in Curtiss-Wright’s EDAU-20XX, CDAU-20XX, and WDAU- 20XX products. The card is intended for applications that require significant signal conditioning flexibility and simultaneous sampling capability. The card provides constant voltage excitation on a perchannel basis, programmable presample filtering, calibration, and user-programmable gain. The user may select between digitally implemented FIR and IIR filters. All filters are phase-locked to the channel format sample rate to maintain time correlation between the input signal and the PCM output.

The filter can be set for 3, 4, 5, 6, 8 or 10 times oversampling (the filter -3dB point will be automatically set to the format sampling rate divided by the oversampling value). 

Alternatively, a 6th order Butterworth filter with a software-specified –3dB frequency falling within broad limits calculated by TTCWare, may be selected. The conditioned analog signal is digitized at up to 16-bit resolution for transmission in the system PCM output format.