[Elecraft] KX3 I/Q Sidetone with NaP3

Don Wilhelm w3fpr at embarqmail.com
Sat Sep 15 18:41:34 EDT 2012


Matt,

While what you say is the way it operates, NaP3 should indicate the 
carrier at the same frequency as the KX3 display.

I have not yet used NaP3 with the KX3, but it is correct for the K3.  So 
maybe there should be an update (and additional transceiver selection) 
for the KX3.  I have not seen posts from Pete in several weeks, so I 
don't know the support status of NaP3.

There are others - TRX-Pan, PowerSDR-IF, HPSDR as starters for the 
list.  Maybe one of those do it better for the KX3.

73,
Don W3FPR

On 9/15/2012 6:24 PM, Matt Maguire wrote:
> It's option 3 :-)
>
> When you select CW mode, the KX3 will not set the frequency of its local oscillator to be the same as what it displays on the screen, but will offset it by an amount corresponding to your preferred sidetone pitch (eg. 600Hz). This way, when a CW signal at the frequency shown on the display is mixed with the local oscillator, you get a 600Hz tone.
>
> On transmit, the KX3 will generate a signal equal to the frequency shown on the display.
>
> So, in order to "zero beat" a signal, you tune the incoming signal so that it has the same pitch as your sidetone. On the waterfall, the signal will be offset from centre by the pitch of your sidetone.
>
> 73, Matt VK2ACL
>



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