If you obtained this utility from Elecraft and used it, then you've done the 
opposite sideband null?  Did you observe any difference in the nulls at FL3 
bandwidths than you got with FL1/FL2 bandwidths?

The utility is probably one of many bits of automation ELecraft uses internally 
for test/manufacture that isn’t supported for customer use.  If I were going to 
run per-band nulling for 1000 radios it would be essential.  For one — the 
process isn’t all that bad :-)

Grant NQ5T



> On Jun 13, 2020, at 12:17 AM, Mark Forsyth <[email protected]> wrote:
> 
> Hi,
> Elecraft have a handy little utility called RxSbNull.exe which does the whole 
> process. All you need is an up to date KX3, an up to date XG3, a Windows 
> computer and the utility. It works like a charm. Turn the radio volume down 
> before you start it though otherwise it’ll annoy the hell out of you. 
> 
> Cheers
> Mark Forsyth
> http://jandmf.com
> VK3KW 
> 

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