中文摘要：

精密时间基准测试仪需要高精度标准频率信号。针对传统晶体振荡器产生信号精度低、频率固定、长期稳定性差的问题，设计了基于FPGA的高精度信号源系统。系统采用小型铷原子钟PRS10产生参考信号，结合FPGA与上位机，设计了输出20kHz-40MHz的频率、波形可实时程控高精度信号源。测试5MHz和10MHz正弦信号，精度可达1019量级，杂散在-64．4dBm以下，满足高精度标准频率信号的要求。

英文摘要：

Precision time benchmark need high-precision standard-frequency signal. A high-precision signal source system design was put forward which was based on FPGA to solve problems that the signal produced by traditional crystal oscillator was low-precision,frequency-fixed,single waveform and long-term stability is poor.The system used a miniature rubidium atomic clock PRS10 to generate reference signal combing with FPGA and PC,20 kHz to 40 MHz high-precision signal source whose waveform and frequency can be real-time changed.The resultS of tests about 5 MHz and 10 MHz sinusoidal signal show that precision can be up to 10-9 order of magnitude and the spurious is under -64.4 dBm, meeting the requirements of high-precision standard-frequency signal.