167.3125 Indianapolis Strange Noise

[JacobInIndy]

I've been hearing this noise the last couple days/nights.

It comes in with the 167.9 pl tone, so I'm pretty sure it's not some sort of interference.

Anywho...anyone ever heard it?

It will run 4, maybe 5 times...then quit. There may be a 10 second pause, then it will go again 4 or 5 times.

 

[RayAir]

I've been hearing this noise the last couple days/nights.

It comes in with the 167.9 pl tone, so I'm pretty sure it's not some sort of interference.

Anywho...anyone ever heard it?

It will run 4, maybe 5 times...then quit. There may be a 10 second pause, then it will go again 4 or 5 times.

My guess is that it is digital encryption though I never heard it with two tones at the beginning.
167.9 is a common fed PL.

 

[Nate710]

weird noise on 153.6350 MHz

I get some weird sounds on that frequency like all the time. It will stop for a couple seconds then it will start up again. Sometimes you can hear what sounds like some morse code.

 

[SkipSanders]

I would tend to guess it's telemetry of some sort. Perhaps a radio site reporting voltages, temperatures, etc. Too short for voice transmissions.

I suppose it could also be a tracking transmitter.

 

[W9NES]

This frequency 167.3125 is Encripted.That is what you are hearing in the Metro Indianapolis/Marion County area.Hope this helps.Very Best Reguards,Tim DeLong W9NES *Monitoring all of Metro Indianapolis/Marion County and Central Indiana*

 

[nd5y]

That is some kind of data. It is not encrypted voice.

 

[W9NES]

I live in Indianapolis and I have also been hearing this.Again It is Encription and the Federal Agency that is using that freq has been doing this for a very long time.

 

[JacobInIndy]

Pretty sure it has nothing to do with encryption. this is an analog frequency around here and that does not sound like analog encryption to me. besides, the ststic parts are too short to be voice.

i was thinking it was some sort of alarm, notification, etc. i just wasnt sure.

$¢

 

[W9NES]

This is Encription.This freq used to be in the clear(Analog) a long time back but was changed over in 2009.Yes it is ENC Encription.