Topband: noise floor
n4is
n4is at bellsouth.net
Sun Oct 18 09:12:01 PDT 2009
>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).
Pete
I'm measuring noise here for almost 3 years, and my good days are -88 dBm
and most common winter days are -81 dBm.
I'm using FSM program by VK1OD.
http://vk1od.net/software/fsm/
FSM (for Field Strength Meter) is a software application that extends a
conventional SSB receiver to allow measurement and calculation of field
strength of radio signals or interference. FSM is a software implementation
of the technique described by Ed Hare of the ARRL in "Manual Testing of
Field-Strength Levels Using Conventional Receivers" dated August 2004
Regards
JCarlos
N4IS
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