[Skimmertalk] [RBN-OPS] Phantom decoders on 15m.

[Björn Ekelund]

Yes, in my experience a noise peak in the spectrum, even if rising just a
decibel or two above the
floor, will make skimmer server fire up decoders. And that's hardly
noticeable in the waterfall.

Björn SM7IUN


Den sön 30 juni 2019 kl 13:14 skrev Pete Smith <n4zr at comcast.net>:

> Yes I have, and I don't see any, but I wouldn't be surp[rised if it was
> just interference of some sort, rising above the lesser atmospheric noise
> on 15.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net> <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 6/30/2019 1:13 AM, Björn Ekelund wrote:
>
> I don't see the same with my RP-16, Pete. When the CW sections on
> 15-12-10-6m are
> quiet (which is most of the time here in SM) I get between 0 and 3
> decoders per band.
>
> The exception is the 192kHz receiver covering the beacon band on 10m since
> I sometimes
> have an noisy, 10kHz wide harmonic from some neighbors electronics and
> that kicks up a good
> dozen decoders.
>
> Have you tried listening to the RP with e.g. HPSDR to make sure there is
> no intermod on 15m?
>
> 73,
>
> Björn SM7IUN
>
> Den lör 29 juni 2019 kl 21:23 skrev Pete Smith <n4zr at comcast.net>:
>
>> I have my test setup ready now, so that I can compare any two antennas or
>> any two Skimsrv SDRs in real time.  In the process, I've found something
>> that puzzles me.  My RP-16 consistently shows 10-20 decoders active on 15
>> meters on Skimsrv, while my QS1R, fed from the same antenna and preamp,
>> shows zero.  Needless to say, I can't hear any CW signals on that band.
>> Previously I've noticed that nearby thunderstorm activity can generate
>> phantom decoders in 160-40, but this happens whatever the weather.
>>
>> Has anyone else noticed this?  Since only the Red Pitaya displays these
>> decoders, I'm wondering if it might be something inherent in that receiver
>> or the firmware.
>>
>> --
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net> <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> _._,_._,_
> ------------------------------
> Groups.io Links:
>
> You receive all messages sent to this group.
>
> View/Reply Online (#3211) <https://groups.io/g/RBN-OPS/message/3211> | Reply
> To Group
> <RBN-OPS at groups.io?subject=Re:%20Re%3A%20%5BRBN-OPS%5D%20Phantom%20decoders%20on%2015m.>
> | Reply To Sender
> <n4zr at comcast.net?subject=Private:%20Re:%20Re%3A%20%5BRBN-OPS%5D%20Phantom%20decoders%20on%2015m.>
> | Mute This Topic <https://groups.io/mt/32254725/361867> | New Topic
> <https://groups.io/g/RBN-OPS/post>
>
> Your Subscription <https://groups.io/g/RBN-OPS/editsub/361867> | Contact
> Group Owner <RBN-OPS+owner at groups.io> | Unsubscribe
> <https://groups.io/g/RBN-OPS/leave/3724331/1455905207/xyzzy> [
> bjorn at ekelund.nu]
> _._,_._,_
>
>