[Elecraft] K3 phase noise & BDR - how related?

[Eric Swartz - WA6HHQ, Elecraft]

Doug,

Transmit phase noise is the composite of both the local oscillator phase 
noise (which also impacts RX) and any additional transmit noise 
generated in the TX chain. In most rigs it should be very close to RX 
phase noise.  It also gives you a feel for the broadband noise level of 
any transmitter.

All of the ARRL phase noise plots you have seen in reviews are TX 
composite phase noise.

73, Eric  WA6HHQ

DOUGLAS ZWIEBEL wrote:
> Okay you techie gurus...please teach me ....
>
> How does the composite TRANSMITTED phase noise impact the RECEIVE BDR specs?
>
> I admit that over the decades I've frequently noted that the ARRL
> review cite that the rx spec is "phase noise limited" but I never
> thought that they meant XMIT phase noise.
>
>