The Direct Digital Synthesiser (DDS) is an experimental PCB module for generating an RF signal at any frequency up to about 40MHz with tiny frequency steps. The upper frequency and resolution depend on the reference frequency, which must be supplied externally to the module (up to 120MHz).
The design includes a PIC microcontroller which translates plain text instructions from an RS232 serial channel into the complex serial command words used to program the DDS chip.
We offer the module as a bare board (left hand side of the adjacent image) for experimentation and development.
- Works from DC to 40MHz (up to about RefClk / 3)
- Uses AD9850 or AD9851 DDS chip
- Uses an external reference clock frequency (up to 120MHz)
- 32 bit frequency resolution
- Programmable using plain text commands from a Personal Computer
- Uses a PIC to communicate via an RS232 serial port
- Available as bare board only
