Therefore we decided to first look for a Chinese clone of such a board and it was easily found and bought on eBay at a price of 70 USD:
The original branded Evaluation Board costs more than 600 USD. Naturally, when working with SDR radio, it was necessary the ability of quick and easy adjustment of the output frequency in a wide range, for example, from 100 kHz to 500 MHz. We opted for the AD9910 because it has all the qualities we needed and it has a fair price.įor us were important parameters such as: high stability of frequency, low level of phase noise and also the minimal number of harmonics and spurious. There existing ready-made IC (Integrated Circuits) for DDS on the market, here are the most common ones among them from Analog Devices IC: AD9910, AD9912, AD9914 and AD9915. This story began at the moment when we got the need of an RF signal source for our experiments with SDR radio.įor implementing that kind of task, the DDS method (Direct Digital Synthesis) is ideally suitable.
