[hpsdr] [HPSDR] Mercury IMD and BDR Measurements

Phil Harman phil at pharman.org
Mon Aug 31 17:59:00 PDT 2009


> ***** High Performance Software Defined Radio Discussion List *****
>
> " See the HPSDR Wiki page:
> http://openhpsdr.org/wiki/index.php?title=A_complete_HPSDR_transceiver "
>
> Thank you for contributing this page, Ron.
>
> I was reviewing the specs at the bottom and two things jumped out at me:
>
> 1) The 20 meter BDR seems weak, especially since it is so much better at
> 80m and 10m.  Is that a typo, or ?
> 2) The IMD DR seems very poor. I'd've expected at least 20 dB better and
> more like 30 dB better.
>
> Anyone else make any of these measurements on Mercury?
>
> Thanks!
>
> Lyle KK7P

There is a very extensive performance review of Mercury that will be added
to the Wiki shortly.

In particular it shows the important effect 'dither' and 'random' have on
the IMD measurements.

73's Phil...VK6APH


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