Re: US Warships jamming Lebanon Internet

[Adrian Chadd <adrian () creative net au>]

On Tue, Feb 08, 2011, Denys Fedoryshchenko wrote:
> On Tuesday 08 February 2011 14:18:59 Adrian Chadd wrote:
> > On Tue, Feb 08, 2011, Denys Fedoryshchenko wrote:
> > >  I try to install C-Band bandpass filter, no effect at all, so it is
> > >  in-band
> > >
> > > interference. Putting foil (yes i try almost everything) near LNB doesn't
> > > affect interference level too.
> >
> > Can you get access to some kind of spectrum analyser kit to see what the
> > kind of interference is?
> >
> >
> >
> > Adrian
> Yes, on short (few minutes) sweeps it is clean. During long time run, with 100 
> Khz resolution, if we run few hours we can catch anomalies on the carrier. 
> Important note: this snapshot done on spectrum analyser in Europe, same 
> transponder, and results similar, so it looks like interference is on 
> transponder. Issue start to affect us at same time when people in Lebanon got 
> local interference issues.
>
> Here is snapshot of carrier spectrum with anomaly: 
> http//www.nuclearcat.com/PICTURES/interference.jpg

And does this interference similarly screw up being able to RX data from
the transponder whilst in Europe?

(eg, if you stick a modem on RX-only in Europe (ie, no uplink) and then
just lock onto the signal and decode whatever happens, do you suffer
the same problem?)



Adrian

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