• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

Analog trunk scanner picking up digital system?

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cnmsales

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Hello all. I have a pro-2051. Today at work I brought my radio in cause its so slow on sundays. The place I work uses a Project 25 Phase I (FDMA) APCO-25 Common Air Interface Exclusive system. While scanning i turned on the signal stalker function. When someone keys up on our radios the scanner detects it, it of course only makes a static sound on the radio. So is the freqs its picking up control freqs? I checked the list and the freqs arent listed in the database as a control channel. It is in the same range. Also note it only pickis up when the radio is keyed up in range of the scanner.
 

kikito

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North Pole, Alaska
The scanner picks it up the because it's still a transmission like any other. It's detecting the carrier even if it can't demodulate the audio.
 

mdulrich

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If the scanner is picking up the "noise" when a radio is being keyed, you are hearing the voice channel. The control channel would be there constantly.

Mike
 
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