[hpsdr] [qs1r] SDR receiver measurements

[Philip Covington]

On Sun, Sep 28, 2008 at 4:11 PM, Marco IK1ODO <ik1odo at spin-it.com> wrote:
> Hi all,
>
> I just finished a new round of measurements on SDR receivers.
> I tested SDR-IQ, Perseus and QS1R. I hope to add HPSDR Mercury + Alex
> in the future, and test QS1R again when the preselector/preamplifier
> will be available.
> This time I measured sensitivity, blocking dynamic range, IMD,
> spurious responses and phase noise of the LO.
> The document is in http://www.spin-it.com/download/SDR_RX_measurements_2.pdf
> Comments and corrections to my poor English are welcome, of course.
>
> 73 - Marco IK1ODO / AI4YF
>

Here is a folder of screen shots every 500 kHz of QS1R with SDRMAXII v1.0.0.98:

<http://www.philcovington.com/qs1r_latest/Screenshots/>

PGA gain was set to high, QS1R RF input terminated with 50 ohm
resistor, bare board without the enclosure.

-- 
Phil Covington
Software Radio Laboratory LLC
Columbus, Ohio
http://www.srl-llc.com