[hpsdr] mercury arrived - noise floor

[Graham / KE9H]

Georg:

As shipped and with new PowerSDR software, the receiver must be calibrated.

You need some kind of calibrated level source, a signal generator, an 
antenna
analyzer and some RF pads, or what ever you can pull together.

The level calibration screen is
SetUp -> General -> Calibration

--- Graham / KE9H

==

Georg Prinz wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hello everybody,
>
> I got my mercury and fired it up successfully. Nevertheless I realized
> that the noise floor is about -95dBm and the RX-meter shows -101,5dBm
> when the input is shortened with 50 Ohms. 
>
> Is this behavior ok, because the whole system is sitting on my workbench
> without any screening case?  The power is taken from a ordinary
> labor-supply.
>
> How can I lower the noise floor?
>
> Thank you in advance.
> Georg, dl2kp
>
>
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