[Elecraft] Nulling QRM

I know this is not possible right now. But, is there any way one can use the DSP on SSB to allow adjacent stations to be actively rejected and thereby arranged to not pump the AGC? For unknown reasons in contests the weak DX stations always like to call within a few kHz of the strongest station

Re: [Elecraft] Nulling QRM

Thanks Guy Yes the latter was what I was wondering too - and even if you could use the 2nd RX to determine the metrics for the DSP in the main RX. For example, centre the sub RX on the unwanted signal, or use a wide filter on the sub RX to get sample the splatter. Model this to generate an

Re: [Elecraft] Nulling QRM

AD6XY wrote: I know this is not possible right now. But, is there any way one can use the DSP on SSB to allow adjacent stations to be actively rejected and thereby arranged to not pump the AGC? You have several tools at your disposal, but perhaps an explanation of what is happening might

Re: [Elecraft] Nulling QRM

Thanks for the interesting reply Lyle, I am mostly interested in operating on HF. QRM is not such an issue on HF as the signal to noise is so much worse. I know what you mean about minimizing the gain before the selectivity but at VHF one has a low noise floor to work with so that does not

Re: [Elecraft] Nulling QRM

I had a thought about your comments on the preamp. Being that many simply leave it on (personally I don't think I've ever used mine) but anyway wouldn't the hardware AGC being at max gain be another indicator that it may be useful to use? Perhaps the PRE icon could flash if use of that feature

Re: [Elecraft] Nulling QRM

Lyle speaks the truth! Also, dont forget that handy little knob labled RF GAIN! I find that, in combination with the HI setting in the AF output, the sdjustable AGC attack and decay settings and the new DSP parameters since the release of V3r25, amazing things can be dug out from 200hz above