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General Scanning Discussion For general questions not specific to a model of scanner or general discussion of use of a scanner. Location specific posts should be directed to the regional forums listed below.

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Old 04-02-2009, 3:12 PM
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Question Identify this radio sound?

New sound heard on common channel, anyone identify for me? I don't think this is interference, but it my be..
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Old 04-02-2009, 3:26 PM
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Wink sound??

sounded like squelch-interference-control chnl... weird..
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Old 04-02-2009, 3:53 PM
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Sounds like intermod to me, a P25 voice transmission and a signal with post MDC 1200.
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Old 04-02-2009, 3:56 PM
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I've considered that some sort of pager noise.......I've heard it a lot up hear on vhf freqs.
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Old 04-02-2009, 6:18 PM
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Maybe there is a new TX in the area causing this.. Hmm...have to track that down...
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Old 04-03-2009, 9:37 AM
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Default New sound - What encryption type?

After listening some more today, this is most certainly a radio transmission and not intermod. There was a request for a radio test right before this transmission. Here is a new sound file.
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Old 04-03-2009, 10:25 AM
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Here's a good site to listen to rf noise.

VE3HLS RF Noise Home Page
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Old 01-15-2014, 3:37 PM
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Default federal freqs

I find this on most of the Border Patrol/Customs/Dea and fed channels. conventional , analog and trunked.

when you figure out how to clear it.. please let me know


always seems that the planes are in the clear, the main channel for customs orlando is always scrambled with this tone.
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Old 01-15-2014, 4:18 PM
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Default sound??

sounds like an OTAR with confirmation at the end ? what frequency are you hearing it on ?
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Old 01-15-2014, 6:39 PM
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418.9750 ch7 dea

cbp-tac2 0169.45000
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Old 01-16-2014, 2:40 PM
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418.9750 Very Active today.
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Old 01-17-2014, 9:02 AM
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Default p.m.s

you could get more pm messages if you turned them on.
google w2sjw for sound bites
and the answer is not really to de-scramble

Last edited by wtp; 01-17-2014 at 9:12 AM.. Reason: more info
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Old 01-17-2014, 12:20 PM
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ok thank you ..
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Old 01-18-2014, 7:14 AM
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Quote:
Originally Posted by LordJ View Post
New sound heard on common channel, anyone identify for me? I don't think this is interference, but it my be..
That's definitely an MDC-1200 ANI burst at the end.

1200 baud FSK and it matches the NRZ-I encoded sync pattern (1000 0100 1000 1101 1011 1111)

Denny
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