US Warships jamming Lebanon Internet

Hank Nussbacher hank at efes.iucc.ac.il
Tue Feb 8 08:15:52 CST 2011


At 13:59 08/02/2011 +0200, Denys Fedoryshchenko wrote:
>On Tuesday 08 February 2011 01:42:42 George Herbert wrote:
> > On Mon, Feb 7, 2011 at 2:23 PM, Ryan Wilkins <ryan at deadfrog.net> wrote:
> > > On Feb 7, 2011, at 4:06 PM, Michael Painter wrote:
> > >> Hi Denys
> > >> I doubt it's intentional jamming since I've had the same problem.
> > >> Aegis radar is very high power in full radiate mode and as such creates
> > >> problems for Low Noise Amplifiers listening at 3.4-4.2 GHz. Someone
> > >> needs to talk to Microwave Filter Company.
> > >> http://www.microwavefilter.com/c-band_radar_elimination.htm
> > >>
> > >> --Michael
> > >
> > > +1 for Microwave Filter.  They've helped me out in a couples jams before.
> > >  They're very responsive and the products are good, too.
> >
> > I think people in San Diego and near Norfolk, VA have the same problems.
> >
> > The C-band frequencies are 2x those of the S-band (4-8 GHz for C, 2-4
> > GHz for S); if the SPY-1 / SPY-1D radar is frequency hopping it may
> > well step on someone's C-band links at twice the radar's basic
> > frequency.  Just need a filter to remove actual S-band frequencies
> > from C-band feeds.
>  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.

Been there in 2007- different disruptor, though .  See:
http://en.wikipedia.org/wiki/Yes_%28Israel%29#Technical_problems_.28autumn_2007.29
http://www.haaretz.com/print-edition/business/a-nation-steps-up-to-rescue-yes-1.230782

-Hank







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