Interesting - I "admitted" what? That there are a lot of Softrock-type
receivers on the RBN, some of which have inadequate I/Q image
reduction? Sure. That direct downconversion receivers like the QS1R
occasionally throw what look like I/Q spots, even though there is no
simple explanation. Sure. I saw mine throw one of those just
yesterday. Wish I knew why.
The RBN teamis actively working on a promising technological solution to
get rid of all of thisclass of busted spots.
Wrong-band spots are quite another creature. I'm still waiting for data
on these, but think that either inadequate harmonic suppression and/or
intermod will be shown to be the source. If that's the case, then the
receiver used probably makes little difference.
Bret, before you attack SDR receiver performance indiscriminately, take
a look at Rob Sherwood's review of the KX3.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 6/8/2013 11:37 PM, Brett Graham wrote:
Eventual admission from N4ZR that a subset of just
wrong-freq-same-band spots were seen at a tad over one-per-minute
(during a contest) got me looking at this again, using non-weekend RBN
data for 2013-03-08 (also with all spots of DXpedition/special event
calls omitted, so hopefully missing majority of stations deliberately
QRV on >1 band or >1 frequency within same band simultaneously, or
deliberately transmitting a fecal signal as no contest that day).
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