I've used that 9851 chip in past designs. Nice job on the synthesizer!

Pete

wrote in message
ups.com...
On Oct 2, 2:35 pm, "Dale Parfitt" wrote:
wrote in message

ps.com... Hi
I Have successfully completed a DDS with the following facilities. It
uses Mcrocontroller PIC16F877A and AD 9850/9851 DDS chip. The main
facility in this DDS VFO is any settings including chip type and DDS
clock can be changed even after programming the Microcontroller CHIP.
Please click on the link below for more details.

http://hamradioindia.org/forums/viewtopic.php?=&p=2428

Do you have any specs on spectral purity?

Tnx,
Dale W4OP

Hi,

The PCb have option for accomodating Coilcraft 7Pole LPF filter and
Spurious are -60db when measured.

SHAJI VU3WIJ