[Elecraft] KX3 direct conversion system

[須崎 純一]

Hi Wayne,

I appreciate the announcement from Elecraft.
I tried RX ISO function, and the leaked signal was disappeared or canceled -25dB approx. on 6m measuring with my rough s-meter.
Let me know any notice other than current consumption, if you have so far and can open.
What a deep handy!

Jun, JI1TLL
> CC: elecraft at mailman.qth.net
> From: n6kr at elecraft.com
> To: ji1tll at jarl.com
> Subject: Re: KX3 direct conversion system
> Date: Wed, 15 Aug 2012 09:07:08 -0700
> 
> 須崎 純 (Jun) wrote:
> 
> > I built KX3 kit (S/N830) up last week after fixing some errors.
> > As soon as trying some functions, I found it's really a direct
> > conversion system.  A weak leaked signal was observed with another
> > receiver just on the watching frequency.
> 
> You can reduce the KX3's VFO signal leakage to another receiver nearby  
> by setting MENU:RX ISO to ON.
> 
> Yes, it is similar to direct conversion, except that there are two  
> channels (I and Q, like other SDRs), allowing for image rejection. The  
> KX3 uses this architecture rather than superhet to provide the SDR  
> feature, as well as to reduce the number of stages, allowing the unit  
> to be very compact.
> 
> 73,
> Wayne
> N6KR