Direct Digital frequency Synthesis systems (DDS) are widely used in communication systems because of fine frequency resolution, fast switching speed, low power consumption and excellent frequency stability. On the other hand, a DDS system output inherently includes high levels of spurious signals. A simple, reliable algorithm, implemented using Visual Basic software and Automatic Test Equipment (ATE), is presented for evaluating location and level of spurs, and for reducing the level of the spurs in DDS-based systems with digital synthesis of the master clock automatically adjusting the DDS master clock frequency and, accordingly, the tuning word of the DDS system.
An Automatic Test Equipment Approach for the Reduction of Spur Levels in Direct Digital Synthesis Systems
SCARPONI, ANDREA;PALAZZARI, VALERIA;TASSELLI, GABRIELE;PLACENTINO, FRANCESCO PIO;ALIMENTI, Federico;ROSELLI, Luca
2007
Abstract
Direct Digital frequency Synthesis systems (DDS) are widely used in communication systems because of fine frequency resolution, fast switching speed, low power consumption and excellent frequency stability. On the other hand, a DDS system output inherently includes high levels of spurious signals. A simple, reliable algorithm, implemented using Visual Basic software and Automatic Test Equipment (ATE), is presented for evaluating location and level of spurs, and for reducing the level of the spurs in DDS-based systems with digital synthesis of the master clock automatically adjusting the DDS master clock frequency and, accordingly, the tuning word of the DDS system.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
