Topband: noise floor

[Greg - ZL3IX]

Hi Pete,

I am also using PowerSDR on Topband, although mine is with HPSDR 
hardware.  The noise level I see on a full sized transmit antenna in a 
500 Hz bandwidth, is -97 dBm, or about S5.  This basic noise floor 
doesn't change much from day to night, unless there is thunder storm 
activity around, in which case it increases at night.

73, Greg, ZL3IX


Pete Parisetti wrote:
> Hello everybody from a newcomer to the list.
>
> I have a question. I would like to understand if my suburban location is
> significantly more noisy than others or not. To do so, it is handy to have
> the noise floor measured in dBm - something I can do with my SDR 5000a. The
> value is around -82 dBm in conditions which I would call "bad" and around
> -90 when "good", measured with the TX antenna (inverted L, 17m vertical/23
> horizontal).
>
> Would anybody else with the same rig (or similar) share their numbers?
>
> Thank you very much in advance and 73.
>
> Pete
>
>
>