On Tue, Mar 10, 2009 at 11:42 AM, Guido <[email protected]> wrote: > If the Q channel in your example has a phase shift of 90 degrees with > respect to I, > then the output is either 10.001 kHz (USB) or 9.999 kHz (LSB). If the phase > shift is 0 degree, > (I is same as Q), then the output is both on 10.001 kHz and 9.999 kHz (DSB).
Excellent. Now I can move one step ahead in the planning process (plan, design, build ... quoting soldersmoke). And I feel relief that my brain is still remembering complex things. :) > Your idea is an interesting because it allows to make a WSPR transmitter > with standard crystals. Other projects that have been linked in reply to my message also use standard XTALs or in any case common parts. I had seen all 3 designs, and I thank their respective authors for the excellent work they've done in designing and documenting. I will need to read again their articles before I proceed with my WSPR 30m TX. > It would be interesting to see if this can be completely digitally built in > a micro controller, i.e: Well, this is beyond my uC knowledge, but certainly an interesting idea. 73, Paolo IK1ZYW PS: don't expect quick advances in the implementation of this idea. A (happy) family event is scheduled in a few days and will keep my busy and sleepless for few months. -- Build your FT-817 External Keypad at: http://www.paolocravero.tk GQRP #12058 + I QRP #476
