[Fwd: LF: DDS Board - Anyone interested ?]
Thu, 25 May 2000 07:18:14 -0400
Talbot Andrew wrote:
> I am considering bulk manufacture of a Printed Circuit Board for the
> AD9850 DDS chip. The design has already been tested and includes the
> DDS, output filter, voltage regulator and a 16F84 PIC. Resident
> software allows the DDS source to be controlled over an RS232 link from
> a PC with ASCII commands. This allows for control from a simple
> terminal programme as well as custom software for PSK/ FSK etc. There
> is no reason why different PIC software can't be used for keyboard /
> rotary encoder etc. Mostly surface mount (large 1206 components
> though) but conventional PIC in a socket for easy firmware changes.
> If there is enough interest I will go ahead with a PCB order. It is
> possible a company (see WWW.HF-INST.CO.UK ) may take the design on
> board and market as a complete signal source, but for now I will just
> get PCBs made if enough interest is shown. Not sure of the price, it
> depends on such things as quantity, how many plated through holes,
> delivery timescales and probably the phase of the Moon !
> The DDS can be clocked with any frequency source desired. For LF I use
> a 5MHz input derived from a master reference which allows outputs up to
> 1.7 MHz with 0.001 Hz resolution, but any clock up to 120MHz (40 MHz
> maximum output) is useable.
> Anyone interested, please let me know so I can get an idea of whether it
> is worth going ahead with a commercial run.
> Andy G4JNT
> The Information contained in this E-Mail and any subsequent correspondence
> is private and is intended solely for the intended recipient(s).
> For those other than the recipient any disclosure, copying, distribution,
> or any action taken or omitted to be taken in reliance on such information is
> prohibited and may be unlawful.