RF system-on-chip (RFSoC) devices provide the potential for implementing a complete radio astronomy receiver on a single board, but performance of the integrated analogue-to-digital converters is critical. We have evaluated the performance of the data converters in the Xilinx ZU28DR RFSoC, which are 12-bit, 8-fold interleaved converters with a maximum sample speed of 4.096 Giga-sample per second (GSPS). We measured the spurious-free dynamic range (SFDR), signal-to-noise and distortion (SINAD), effective number of bits (ENOB), intermodulation distortion (IMD) and cross-talk between adjacent channels over the bandwidth of 2.048 GHz. We both captured data for off-line analysis with floating-point arithmetic, and implemented a real-time integer arithmetic spectrometer on the RFSoC. The performance of the ADCs is sufficient for radio astronomy applications and close to the vendor specifications in most of the scenarios. We have carried out spectral integrations of up to 100 s and stability tests over tens of hours and find thermal noise-limited performance over these timescales.

中文翻译：

---

表征基于 RFSoC 的射电天文接收机的高速数据转换器的性能

RF 片上系统 (RFSoC) 设备提供在单板上实现完整射电天文接收器的潜力，但集成模数转换器的性能至关重要。我们评估了 Xilinx ZU28DR RFSoC 中数据转换器的性能，这些转换器是 12 位、8 倍交错转换器，最大采样速度为每秒 4.096 千兆采样 (GSPS)。我们测量了 2.048 GHz 带宽上的无杂散动态范围 (SFDR)、信噪比和失真 (SINAD)、有效位数 (ENOB)、互调失真 (IMD) 和相邻信道之间的串扰。我们都捕获了数据以使用浮点运算进行离线分析，并在 RFSoC 上实现了实时整数运算光谱仪。ADC 的性能足以满足射电天文应用的需求，并且在大多数情况下都接近供应商规格。我们已经进行了长达 100 秒的光谱积分和数十小时的稳定性测试，并发现了这些时间尺度上的热噪声限制性能。