> > > Using DDS for the VFO is optimal at the moment. Yes there are spurs, > but the phase noise is good and you can tune them as often as you want > without worrying about wearing out limited flash memory in parts like > the Si570 which is so popular with the Softrock SDR's. Perhaps this > flash memory issue is one reason why the designer of the Elektor board > compromised with the Cypress Semi part. >
Do you mean some kind of endurance (like eeproms have) for Si570. I've not seen any mention of that in any documentation. I've tought that there is no such endurance with the devices, they does not remember the frequency after power down. 73's oh8kva/jarmo > >
