PCS Electronics PCS Electronics - home page PCS Electronics  
RegisterSearchFAQAM & FM Radio transmitters shop UsergroupsLog in
non licenced radio transmissions

 
Reply to topic    PCS-Electronics Forum Index » Antennas View previous topic
View next topic
non licenced radio transmissions
Author Message
jospjn
New registered user
New registered user


Joined: 28 May 2007
Posts: 2

Post non licenced radio transmissions Reply with quote
Hello,

In the case that a person is transmitting illegally or as a pirate radio can the authorities dedect where the transmission point is coming from?

Thanks
Jos.
Mon May 28, 2007 4:27 pm View user's profile Send private message
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
Yes they can..
Fri Jun 01, 2007 3:09 pm View user's profile Send private message
jospjn
New registered user
New registered user


Joined: 28 May 2007
Posts: 2

Post Reply with quote
Hi how can they? is it by detecting the antenna or there can be something indicating
Fri Jun 01, 2007 4:33 pm View user's profile Send private message
djhubbalubba
Compulsive poster:)
Compulsive poster:)


Joined: 29 May 2007
Posts: 77
Location: In Studio

Post Reply with quote
They use an instrument and detect where the signal is coming from.
Wed Jun 06, 2007 9:08 pm View user's profile Send private message
stormfm
New registered user
New registered user


Joined: 25 Jul 2007
Posts: 1

Post Reply with quote
a pretty simple method would be an RF meter and a yagi. see which direction gives the best signal, then draw a line on a map corresponding with that. then go to another location and do the same. the intersection of the two lines is where the transmission is coming from. BTW does anyone know if AM is hard to track?
Wed Jul 25, 2007 5:17 pm View user's profile Send private message
Low Power Radio Guy
New registered user
New registered user


Joined: 23 Feb 2008
Posts: 4
Location: 4th corner of the USA
us.gif

Post BTW does anyone know if AM is hard to track? Reply with quote
AM is quite easy to track, as well. In fact, the old marine direction finders sold years ago (before loran C and GPS) used land based AM stations for reference points. Any signal that can be received can be tracked, it's just logical, really. Spread spectrum is a bit harder because the tracker won't know which freq to track, but that's not used for broadcast, so...

This is why lots of folks use STLs - the main transmitter is located remotely from the studio or audio source and the STL, frequently using a non-broadcast band freq with a very narrow pattern antenna, is often pointed up in the air to the main transmitter. This makes it much more difficult to track the source of the audio - the transmitter can be found but not the people operating the transmitter.
Wed Mar 12, 2008 5:54 am View user's profile Send private message Visit poster's website
pcs
Site master
Site master


Joined: 18 Jan 2002
Posts: 2938
Location: Radio Land
si.gif

Post Reply with quote
True, but they usually don't even bother with AM since you usually need a complaint
and that pretty much never happens with AM.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Wed Mar 12, 2008 12:00 pm View user's profile Send private message Visit poster's website
Display posts from previous:    
Reply to topic    PCS-Electronics Forum Index » Antennas All times are GMT + 1 Hour
Page 1 of 1

 
Jump to: 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group