AD9850 DDS Signal Generator Module 0–55MHz 6 Bands LCD

AD9850 DDS Signal Generator Digital Module — 0–55 MHz, 6 Bands, 1602 LCD

Take precise control of your RF projects with the AD9850 Direct Digital Synthesis (DDS) Signal Generator Module. Supporting a continuous frequency range of 0–55 MHz in 1 Hz steps across 6 selectable frequency bands, this compact module is engineered for amateur radio builders, electronics engineers, hobbyists, and students who demand stable, high-resolution signal output.

Key Features

• High-Resolution Frequency Control: Tune continuously from 0 to 55 MHz in 1 Hz increments for pinpoint accuracy in testing and experimentation.
• 6 Frequency Bands: Quickly switch between preset bands — 3.8, 7, 9, 14, 18/21, and 27/29 MHz — ideal for amateur radio (SSB, LSB, USB, AM, CW) applications.
• 1602 LCD Display: Clear, easy-to-read display shows current frequency, band, and operating mode at a glance.
• VFO A/B & RIT: Dual VFO operation with receive incremental tuning (RIT) for fine-tuning your receive frequency independently of the transmit frequency.
• Multiple Operating Modes: Cycle through USB, LSB, AM, and CW modes via the dedicated SSB mode switch button.
• Onboard 78L05 Voltage Regulator: Built-in regulation ensures stable 5V logic from an 8–9V DC input (200 mA), or power directly from your motherboard's 8V rail.
• Compact & Portable: Measuring just 80 × 45 × 30 mm and weighing only 66 g, this board fits neatly into enclosures or portable rigs.
• DIY-Friendly Interface: Clearly labelled connectors for encoder (ENC), memory (MEM), VFO toggle, SSB mode, RIT, and CAL make integration straightforward for builders of all skill levels.

Button & Interface Reference

• ENC: Rotary encoder input for frequency tuning
• MEM: Switch to memory channel mode
• VFO: Toggle between VFO A and VFO B
• SSB: Cycle operating modes (USB → LSB → AM → CW)
• RIT: Fine-tune receive frequency offset
• CAL: Calibration / settings function
• KB-1 / KB-2: Keypad matrix inputs (shared common pin, not GND)

Technical Specifications

What's in the Box

• 1 × AD9850 DDS Signal Generator Digital Module

Note: Battery not included. Color may vary slightly due to monitor settings. Allow ±1–2 cm dimensional tolerance due to manual measurement.

For a deeper understanding of direct digital synthesis technology and RF signal generation, visit the NIST Electronics & Photonics resource — an authoritative reference for electronic standards and measurement.

Frequently Asked Questions

Q: What is the frequency resolution of this AD9850 DDS signal generator module?

A: The AD9850 DDS signal generator module supports continuous tuning from 0 to 55 MHz in 1 Hz increments, giving you extremely fine-grained frequency control for testing, amateur radio, and educational electronics projects.

Q: Can I power this DDS module directly from a radio motherboard?

A: Yes. The module can be powered via the 8V rail (14p connector) of a compatible radio motherboard. When powered this way, the DDS module does not require a separate power supply. Alternatively, supply DC 8–9 V at 200 mA directly to the module's own power input.

Q: What operating modes does the SSB DDS signal generator support?

A: The module cycles through USB (Upper Sideband), LSB (Lower Sideband), AM, and CW modes using the SSB mode button. It also supports dual VFO operation (VFO A / VFO B) and RIT (Receive Incremental Tuning) for independent receive frequency adjustment.

Q: Is this module suitable for beginner electronics builders?

A: Absolutely. The clearly labelled connector interface, 1602 LCD display, and straightforward button layout make this DDS generator module accessible to hobbyists and students, while its technical depth satisfies the needs of experienced engineers and radio amateurs.