[FedCom] FBI Radio Systems Keyups?

[Tom ND5Y]

Yes. All I could see was the PL tone. In my area it appears that this is 
  just some type of interference or noise that occasionally falses the 
PL decoder, or something in whatever they use to link everything together.

Tom

Tom Greenwood wrote:
> Has anybody made any attempts at looking at the transmissions using an audio
> spectrum analyzer such as the program Spectrogram to see if there are any
> subaudible data transmissions?  I have used this program in the past looking
> at data transmissions with very interesting results.  As I recall, the old
> 414/419 links were rather revealing once looked at this way.
> 
> 73's
> Tom, N1JQB
> Metro West Boston


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