US Warships jamming Lebanon Internet

Denys Fedoryshchenko denys at visp.net.lb
Tue Feb 8 05:59:38 CST 2011


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.




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