Design of signal acquisition and waveform generation based on CX8242K

Aiming at the design requirements of multi-channel high-speed signal acquisition in phased array antenna systems, a mid-frequency signal acquisition board based on RF direct sampling transceiver chip is designed and implemented, which realizes signal acquisition and digital waveform generation of 2 ADCs and 2 DACs. This paper introduces the hardware and software design of the high-speed signal acquisition board, and builds a testing system to verify its performance indicators. The ADC has a signal-to-noise ratio better than 55dB and a spurious free dynamic range better than 65dBc at a sampling rate of 1.6GHz in dual channel working mode. The DAC has an output power greater than -5dBm and a spurious free dynamic range better than 60dBc at a conversion rate of 3.2GHz in dual channel working mode. This design adopts a modular design approach, expands the dynamic range of transmission and reception, improves product configuration flexibility, enhances system integration, and reduces overall power consumption and cost.