The S-meter on all Flex radios is calibrated like a RF spectrum analyzer to
S9 = -73 dBm = 50 uV, so what you are seeing ins actual power in the RX pass
band.

Since you are seeing integrated power, the size of the RX filter is a
determining factor.  If you are using a 3K filter, change it to 500 Hz and
notice the reduction in signal power (strength).

Also other radio's S-meter is effected by the RF gain and AGC.  Not so with
the FlexRadio SDRs.  These factors can account for the difference.


On Wed, Jun 22, 2011 at 9:52 AM, Michael Goins <wmgo...@gmail.com> wrote:

> Still setting up a 1500 here and the issue of the moment is noise
> threshold.
>
> I am in the country and the radio I removed to replace with the 1500 had a
> noise level of S1 or so. With the 1500, I am up around S5 as baseline noise
> level. Nothing else has changed.
>
> The receiver is hotter, but not tremendously so, and I do not have the rig
> strapped to the computer yet and I'm hoping that is some of the issue.
>
> mike, k5wmg
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-- 
-Tim
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