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

Abstract

A system for the testing of digitisers in the frequency range of 1 MHz was developed at the Dept. 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.

Influence of test signal phase noise on high-resolution ADC testing

“…These results were verified by the testing of two types of commercial digitizers (VXI HP E1430A, NI PXI-5122) performed measurement resultsphase noise (see Fig. 1) -that is difficult to be suppressed even by HQ band-pass filters (see [2] for more details).…”