Key benefits Extremely fine frequency control: DDS algorithm provides a frequency step size as small as 0.001 Hz, enabling precise tuning and repeatable settings. Stable, low-noise reference: a digital quartz oscillator is used as the frequency reference for improved stability and reduced interference. Flexible power options: standard DC 5.5 × 2.1 mm jack and USB power compatibility make it easy to power from common adapters, USB chargers, power banks, or USB power supplies. Main features DDS frequency synthesis with 0.001 Hz resolution for accurate, repeatable signal generation. Digital quartz oscillator frequency reference for stable, interference-free performance. Power input via DC5.5×2.1 mm connector; USB can also be used to supply power through a USB power adapter or USB charger. How this product solves problems Eliminates coarse tuning limitations: the 0.001 Hz step resolution removes the need for constant manual fine adjustment when precise frequency settings are required. Reduces measurement errors caused by drift and noise: the quartz oscillator reference provides a stable baseline, making results more reliable over time. Simplifies setup and deployment: standard power interfaces let you use common adapters or USB power sources so the unit can be used in labs, benches, or field locations without special power equipment. Performance and compatibility Frequency control: DDS algorithm, step size down to 0.001 Hz for high precision. Frequency stability: digital quartz oscillator reference for low noise and stable output. Power compatibility: DC 5.5×2.1 mm barrel connector; USB power supported via USB adapter, charger, or other USB power device. Practical applications Electronics testing and development: precise frequency generation for checking filters, amplifiers, and signal paths where accurate tuning matters. Radio and RF hobbyist work: stable and finely adjustable frequencies for receiver testing, alignment, and bench experiments. Calibration and education: repeatable, low-noise signals for training, classroom demonstrations, or routine calibration tasks. What to expect in everyday use Accurate, repeatable frequency settings thanks to DDS with 0.001 Hz steps. Stable outputs with minimal interference due to the digital quartz oscillator reference. Convenient powering options using a standard DC 5.5×2.1 mm adapter or any suitable USB power source for flexible deployment.