[137032] in North American Network Operators' Group
RE: US Warships jamming Lebanon Internet
daemon@ATHENA.MIT.EDU (Thomas Magill)
Tue Feb 8 08:26:48 2011
From: Thomas Magill <tmagill@providecommerce.com>
To: George Herbert <george.herbert@gmail.com>, Ryan Wilkins <ryan@deadfrog.net>
Date: Tue, 8 Feb 2011 13:26:01 +0000
In-Reply-To: <AANLkTimgc4omV-fSEDWNGm=oL3s9+jeANHNFZF9YW5sH@mail.gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I'm in San Diego and at my last company we had to replace all 2.4Ghz wirele=
ss with 5Ghz when we started getting hammered across that range by a signal=
about 90db higher than our APs by something. We were never able to identi=
fy what it was, but the signal looked odd and an ex-navy coworker said it l=
ooked like encrypted navy traffic. It always came in burst and would disco=
nnect every user when it happened. Too bad they weren't doing it the day w=
e did our site survey.
-----Original Message-----
From: George Herbert [mailto:george.herbert@gmail.com]=20
Sent: Monday, February 07, 2011 3:43 PM
To: Ryan Wilkins
Cc: nanog@nanog.org
Subject: Re: US Warships jamming Lebanon Internet
On Mon, Feb 7, 2011 at 2:23 PM, Ryan Wilkins <ryan@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. =A0They've helped me out in a couples jams befor=
e. =A0They'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 f=
or 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.
--
-george william herbert
george.herbert@gmail.com
