Résumé
In this paper, we present the implementation of a low-cost solution for the test of 2.4GHz receivers on a standard Automatic test Equipment (ATE). The approach relies on the use of a customized binary signal generated by a digital tester channel as the test stimulus. This binary signal is specifically defined such that it presents similar spectral characteristics in the frequency band of the Device Under Test (DUT) as a conventional analog test stimulus generated by an RF tester channel. Dedicated scripts are developed that permit (i) the selection of an appropriate sampling frequency for the digital channel to avoid spectral corruption in the DUT frequency band, and (ii) the automatic conversion of the I/Q data computed by the ATE in case of a conventional RF stimulus into a binary sequence to be stored in the vector memory of the digital tester channel. Experimental results are provided that validate the efficiency of the proposed solution, under different communication protocols (ZigBee and Bluetooth Low Energy) and signal strengths.