[BC] RE: Satellite trouble???

[Chuck Lakaytis]

It is not that the AWACS aircraft are on the receive frequency, it is that
the peak power of the signal is so strong that it desenses the LNB's, which
are pretty broadband.  We have a couple of sites where we have two filters
in series to take care of the problem.

In Alaska we are also bothered by shipboard radar in Juneau, Seward, and
Valdez.  And we have problems with aircraft radar altimeters.

We install filters on all new installations, even if we do not have a
problem now, because someday we will.

(Watching AWACS aircraft landing as I type)

Chuck Lakaytis
Director of Engineering
Alaska Public Broadcasting, Inc.
Anchorage, Alaska
907 277 6300
907 310 4339 (cell)


-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net] On Behalf Of Tom Taggart
Sent: Tuesday, January 10, 2006 3:28 PM
To: broadcast at radiolists.net
Subject: [BC] RE: Satellite trouble???



> "The frequency band of the AWACS radar is classified, but in general,
> operates in the 2700- 3700 MHz band."

Well, if you can get that far (and I found out they used that band just be  
using Google) you could probably find the exact part of the band with a  
spectrum analyzer and an LNA or even LNB. Just waive it around when you  
hear the interference.  Although I wouldn't count on them staying in that  
band (or having a clean signal). Even with an AWACs filter hanging on our  
LNB I can still hear them go over on ocasion. (And not just AWACS, fighter  
planes use a similar band--they sent a pair of F-18's to escort an Air  
France plane into Cincinnati a year ago or so--know the flight path--been  
on that flight--it's right over our site.

_______________________________________________
This is the BROADCAST mailing list
To send to the list, email: broadcast at radiolists.net
For sub changes, archives and info on this other lists:
http://www.radiolists.net/