DDS 0-55MHz signal generator based on AD9850

0-55MHz DDS Signal Generator Based on AD9850

Support 0 ~ 55MHz continuous adjust in 1Hz steps.

This generator has a 78L05 voltage adjust.

Input current 200mA, 8-9V input voltage would be the ideal voltage.

5p/6p connect encoder as the picture.

(8V GND) is the 8V power supply from main board. If powered by main board, DDS does not need independent power supply.

1 ~ 6 correspond to 6 frequency bands: (3.8,7, 9,14,18 or 21,27 or 29)

LSB, USB, CW are the three modes chosen.

DT is signal from main board.

Keys and connection interfaces:

ENC: encoder switch

MEM: memory mode switch

VFO: Transfer from VFO A to VFO B or from VFO B to VFO A.

SSB: work mode change: circular from USB, LSB, AM, CW, and so on...

RIT: receiving frequency tuning

CAL: set functions

KB-1 and KB-2 have shared common pin, but it is not GND.

DOWNLOADABLE INSTRUCTION MANUAL BY CLICKING ON THE ATTACHED DOCUMENT TAB OF THIS LISTING