AD9951 DDS & DDS-4 digital VFO
The Direct Digital Synthesis (DDS) Unit described in this document is based on
the
Analog Devices AD9951/54 family chips.
Featuring advanced technology, high speed 14 bit Digital to Analog Converter,
capable of generating a frequency-agile analog
output sinusoidal waveform at up to 200 MHz with a fine tuning resolution of 32
bits.
DDS assembled inside metal box (90 x 35 mm)
The Unit consists of a 2-layer pcb providing maximum flexibility in a minimum size, it includes room and facilities for:
The Unit can be interfaced to a micro based controller trough a suitable 6 pin connector.
AD9951 spectrogram with 50 MHz Spam F. out = 42.8 MHz
AD9951 spectrogram with 50 MHz Spam F. out = 15 MHz (only armonics are visible)
The spectrogram for the OLD AD9851 DDS with F.= 42.8 MHz
ED2 Prototype
I0CG DDS controller ED3 based to PIC182620
New DDS VFO for vintage radio (Drake & Collins)in the new case now available (March 2011)
DDS_4 is vailable nearly no soldering KIT (the electronics board are assembled and tested)
New Features of V 3.3:
Optical encoder for tuning, opto-coupled USB interface, CAT control via Ham Radio Deluxe, Reference oscillator software set-up, RF output level programmable from +7 dBM to -60 dBm, one dB step IF frequency is programmable to adiust any RX or homebrew RX/trxDownload: DDS-4 manual for use with Vintage radio (Collins, Drake....)
Download: DDS-4 Manuale Versione in Italiano V3.3 del Marzo 2011
For any information's ask to
home-page:
www.i0cg.com