System for the testing of high-resolution ADCs at frequency of 1 MHz

Testing of Middle-resolution Digitisers at Input Signal Frequency of 1 MHz

“…2c. Frequency spectra measured by the tested digitiser NI-PXI-5922 at the band-pass filter output identified by the first evaluation of developed system two years ago (see [1]), when only HP E1430A digitiser was at disposal at CTU-FEE. The distortion in the vicinage of fundamental is contained evidently in the testing signal.…”

“…Two alternates of the system were manufactured -a precision design using special high-quality (HQ) LC filters with a near-linear transfer characteristic and a low-cost (low-quality -LQ) design applying common LC filters using coils with ferromagnetic cores. The measurement of testing signal quality showed that the low-cost system with common LC filters could be applicable for the testing of digitisers with the ENOB up to 14 and up to 20 in case of system using high-quality filters -see [1]. However, there was at disposal only one type of digitiser (VXI HP E1430A) to evaluate the applicability of the system at that time.…”

“…of Measurement, CTU FEE a few years ago. Two alternates of the system were manufactured -a precision design using special high-quality LC filters with a near-linear transfer characteristic and a low-cost design employing common LC filters using coils with ferromagnetic cores -see [1]. Both alternates were used for testing several types of middleresolution digitisers.…”