[Skimmertalk] Sprit Down of Skimmer
k1ttt at arrl.net
Thu Mar 24 06:45:29 EDT 2016
One of the other recent expeditions was listening down occasionally also... I thought they were doing it as a cw copying test as they had a huge pileup up from their frequency, but were easy to work if you copied the dn.
David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373
From: Skimmertalk [mailto:skimmertalk-bounces at contesting.com] On Behalf Of Bob Wilson, N6TV
Sent: Thursday, March 24, 2016 01:08
To: Dai NAGAKURA
Cc: SkimmerTalk Reflector
Subject: Re: [Skimmertalk] Sprit Down of Skimmer
Sorry, I should have reviewed my own presentation <http://bit.ly/UsingRBN2015> on this subject. See slide 22. Briefly:
Originally CW Skimmer recognized just: "CQ", "TEST", and "QRZ"
VE3NEA later added "FD", "SS”, "NA" and "UP"
If they are listening down instead of up (can't remember *ever* seeing that done before), CW Skimmer will *not* recognize "DN" as a "CQ" and they will not be spotted much.
Thanks to K6MR for the reminder.
On Wed, Mar 23, 2016 at 5:13 PM, Dai NAGAKURA <ndai at cameo.plala.or.jp>
> Thank you Bob , This must be my misunderstanding.
> Just after VK0EK started , Skimmers cannot copy them then I thought
> Skimmer does not recognize callsign when DN(DWN) is just before
> Now I understand algorithm .
> Many thanks
> Dai JF2IWL
> On Wed, 23 Mar 2016 16:48:08 -0700
> "Bob Wilson, N6TV" <n6tv at arrl.net> wrote:
> > I do not understand what you mean by "before DN letter".
> > If they do not send CQ or TEST, or if they send the callsign only
> > once every 10 minutes, or if they send "UP" at a different speed
> > than the callsign, they will rarely if ever be spotted by a CW Skimmer.
> > 73,
> > Bob, N6TV
> > On Wed, Mar 23, 2016 at 11:02 AM, Dai NAGAKURA
> > <ndai at cameo.plala.or.jp>
> > wrote:
> > > World Skimmers cannot caprure VK0EK now Is CW Skimmer Server does
> > > not acaputure callsign before DN letter?
> > >
> > > Dai JF2IWL
> > > --
> > > Dai NAGAKURA <ndai at cameo.plala.or.jp>
> > >
> > > _______________________________________________
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> > >
> Dai NAGAKURA <ndai at cameo.plala.or.jp>
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