[Scan-DC] presidential signal jammer

[Andrew Clegg]

Today I was monitoring a portion of the 2 meter amateur radio band on my 
spectrum analyzer, and I recorded some wideband interference that I have not 
seen before. I've been monitoring this portion of the spectrum for several 
days, and today was the only day I've seen these signals. They started 
around 10:20 am (about the time the motorcade to the Capitol was getting 
going?). The stronger bursts start up again around 2:40 PM (beginning of 
parade back to White House?) They were last seen around 4:26 pm (about the 
time the president arrived back at the White House?).

If it's related to the signal jammer, I wouldn't think it's very 
effective -- it is not constant and not very wideband (although, there are 
likely some mitigating effects due to the swept frequency nature of my 
spectrum analyzer, and the fact that I'm a few miles away).

Perhaps this is related to some other aspect of today's events. Normally, I 
wouldn't have paid too much attention to something like this, but the 
coincidence with today's events makes me curious.

I posted a couple of screen shots of the interference at 
http://w4je.com/146MHzRFI.htm.

Andy


--------------------------------------------------
From: "Alan Henney" <alan at henney.com>
Sent: Monday, January 21, 2013 12:14 PM
To: "Scan DC" <Scan-DC at mailman.qth.net>
Subject: [Scan-DC] presidential signal jammer

>
> NBC engineering crews on 450.5375 reporting that the "jammer" has been 
> activated.
>
> Cell service is down in area of the Newseum.  Says he is watching it on 
> the spectrum analyzer.
>
> He says try turning off your cell phones and power up again and you might 
> get past the jammer!
>
> As for 406.5875, 408.45, 409.85 the short bursts have a noisy modulated 
> sound to them, not the quiet bursts I associate with LTR.
>
> Alan
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