2025年3月19日 · 通过研究dds输出的频谱（dds直接输出的，未滤波的信号） 可以观察到dds的杂散非常之大 所以会有很多除所需要的信号以外的信号

New version V2.1 Universal VFO for all ILER, MFT, EGV transceivers and similar projects. Universal VFO DDS 0 to 40MHz AD9850 based. More info... Download manual.

2024年2月27日 · This self-contained functional module generates a good-quality RF signal from 1-60 MHz by using a small pc board to contain just the bare DDS essentials – an Analog …

Integrated circuit U2 is an Analog Devices AD9834 Direct Digital Synthesis (DDS) chip and forms the heart of the DDS VFO. A 50MHz crystal oscillator module supplies the master clock and …

They mostly use Analog Devices AD9850 or AD7008 single-chip DDS system to generate RF output directly. Such solution is acceptable and welcome as a VFO in small (QRP) transmitters.

2021年7月1日 · A High-Performance HF VFO using the AD9854 DDS IC. During the late 1990s, radio frequency homebrewers really began taking advantage of the conveniences that DDS …

Combining a very cheap Chinese-made DDS module and a low cost microprocessor and LCD display, this VFO delivers band-wide tuning, digital stability and four tuning speeds to the …

Universal DDS VFO (f_max = 60 MHz) for use in homemade QRP transceiver. The microcontroller only is wired to the minimum. All pins that are not occupied by the DDS chip …

2015年1月27日 · The Ozqrp DDS VFO kit is a low cost direct digital synthesis (DDS) VFO capable of operating from 1MHz to 10MHz with programmable IF offsets , making it suitable …

2019年4月1日 · 1.dds架构。 2.8位单片机主控。 3.频率范围：7m 40米业余段可调。 4.模式：cw。（ssb就不支持了，据了解夜莺ssb效果不理想） 5.1.3寸oled显示屏。 6.功率暂 …