[Scan-DC] Something different -- ACARS (131.55 MHz)

[mike agner]

The RR Wiki has a short article on the subject, along with the other 
freqs ACARS has been heard on...

http://wiki.radioreference.com/index.php/ACARS

It would be rather difficult to scan these freqs, since you need to keep 
the squelch open to hear the sync tone, unless your scanner's squelch 
opens up fast enough - it comes across very fast (I want to say 100ms, 
but I could be wrong...). However as noted in the article, you don't 
need to modify your scanner at all (contrary to what others might 
think...) to be able to get a good clean data signal

I used to fool around with this a bit; some companies will use the 
alternate freqs just to get away from the congestion on 131.55. Those of 
you that have fooled around with amateur packet radio will understand 
this; packet collisions result in lost data, and there are times when 
that simply won't do...

HTH...Mike