1-01-16 15.50, skrev Peter Chadwick på Peter_Chadwick@mitel.com följande:
>
> Tom says:
>
>> Blocking dynamic range is the ratio of the weakest
>> signal that can be heard to a signal off-frequency
>> that causes a detectable difference in noise or level
>> of the desired signal.
>
> So it's a sort of mixture of phase noise performance and gain compression.
> Needs
> a good signal generator to measure - or
> do it at 21.4MHz minus a few kHz with a 21.4MHz filter
> cleaning up the sig genny. Needs to be plotted against offset to be evry
> menaingful though.
>
> Interestingly enough, have you noted how all the ARRL review phase noise plots
> are pretty much always the same numbers?
> Is this because all rigs are pretty much the same, or is there
> a systematic effect?
>
> 73
>
> Peter G3RZP
>
>
>
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>
>
In the ARRL curves very often there is a spike abt 15 khz away from the
carrier from the switched supply or maybe the synthesizer? But they never
comment the effects in receiving of this????
Why?
de Hans
--
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