Re: DDS spectral "purity" ?

Nick Kennedy
 


On Sun, Jul 10, 2016 at 4:35 AM, anthonyjaques94@... [PHSNA] <PHSNA@...> wrote:

Related to this; I discovered a long time ago that the chinese modules (and possibly the AD985x itself) generates a whole forest of junk at about -60dBm (ish) while it changes frequency, and for about a second or so afterwards. In any sweep mode it does this all the time of course!
                                                                Tony (G3PTD)...


​So I guess much of that extra junk wouldn't be present if the DDS were not sweeping then?  That's good news.  Although even when using the DDS as a​ VFO we might be doing a small jump from TX to RX for the CW and/or IF offset.  That's not within PHSNA's scope though.

73-

Nick, WA5BDU

Join PHSNA@groups.io to automatically receive all group messages.