[MilCom] ADS-B emission type

[Brian]

You might like reading this website to learn more about the inside of this ADS-B receiver...
<http://www.qsl.net/dl4mea/fpgaadsb/modesbeast.htm>



-----Original Message-----
From: John Kintz
Sent: Saturday, April 16, 2011 8:34 PM
To: milcom at mailman.qth.net
Subject: [MilCom] ADS-B emission type

To the Group -

I'm developing an interest in ADS-B monitoring as an adjunct to MilCom.  
In an attempt to see what type of ADS-B signal reception I might be able 
to get at my location, I thought I might try to receive some ADS-B 
signals "in the rough" with my IC-8500 communications receiver.  
According to several articles I have researched, ADS-B apparently uses 
the frequency 1090 MHz.

Can anyone tell me the following...

 >> If not 1090 MHz, what is the correct frequency for ADS-B?

 >> What type of radio emission is an ADS-B signal (i.e. - what type of 
modulation is it)?

 >> I am currently receiving a WFM signal on 1090 MHz; It is a very 
brief pulse, repeating every 12 seconds. 

Might this be an ADS-B signal?  If not, can anyone shed any light on how 
to best monitor these signals with a standard comm receiver?

I fully understand that a specialized receiver and a PC are necessary to 
decode any intelligence from ADS-B transmissions.  At this point, I 
would just like to see if I can receive ANY related signals at my location.

Thanks in advance for your input.

John
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