413.5875, 409.85, 940.2375

[Curfew]

This is some sort of pager-timing signal heard for a few seconds, it comes on and then off at about 4 to 5 second intervals- but keeps going... (413.5875). Then there is a beep-beep as a morse id type beacon on a continual basis at 409.85.

Then there is this 940.2625, this one reminds me of a trunked control station but runs in bursts, on and off.

Wondering if anyone has heard these in large cities and may know what they are. Thanks, Curfew.

 

[ecps92]

Have you tried listening to the UHF & 900 Paging channels to see if your hearing the image frequency?

Routinely in Large cities and due to the electronics of the Scanners [Radio] can cause you to hear more than the Displayed channel.

ie: Some of my 406-420 Mhz channels also hear the Boston Police in the 460 Mhz band, not overload or intermod but the I.F. of Boston PD.

Try listening to 454-455 Mhz and the 900 Paging on another scanner at the same time you hear the 406 Paging.

This is some sort of pager-timing signal heard for a few seconds, it comes on and then off at about 4 to 5 second intervals- but keeps going... (413.5875). Then there is a beep-beep as a morse id type beacon on a continual basis at 409.85.

Then there is this 940.2625, this one reminds me of a trunked control station but runs in bursts, on and off.

Wondering if anyone has heard these in large cities and may know what they are. Thanks, Curfew.

 

[Zack08]

940.2625 is a ReFLEX paging frequency

I have no idea on the other two......

 

[Curfew]

Thanks, i will try the suggested. Curfew

 

[Audiodave1]

940.2625 is a ReFLEX paging frequency

I have no idea on the other two......

I could be wrong but I believe the 940-945 band is the input side the 935-940Mhz trunk systems.

900 Paging takes place 929-930 and 931-932..

 

[Curfew]

I used 4 different radios on these.They all have to be legitimate receives. Curfew

 

[jawhite2]

Curfew,

Could you tell us your location?

Regards,

John

 

[nd5y]

I could be wrong but I believe the 940-945 band is the input side the 935-940Mhz trunk systems.

900 Paging takes place 929-930 and 931-932..

You're wrong...
The inputs to the 935-940 band is 896-901 (-39 MHz)
but right on the paging freqs.

940-941 is narrowband PCS
http://wireless.fcc.gov/services/index.htm?job=service_home&id=narrowband_pcs

 

[Curfew]

413.5875

More on this one, this comes on for 4-5 seconds duration while it's transmitting then goes off. It will transmit exactly every 10 seconnds.

With a pro-97 it generally shows nothing as far as CTCSS, DCS, EDACS, MO as it is coming on and off but what does happen about every 20 minutes or so it spits out a quick LTR ID. I have noticed it is not the same ID as it decides to transmit the ID. After watching the freq for hours it may eventually repeat a ID, i don't know.

It will only appear in the 97's LTR mode on the display real quick -then disappears, so one has to really watch when the ID comes up because it is gone from the display window pretty quick after it appears. Some may know what this system or mode is. Curfew.

 

[ecps92]

I'm gonna back track here and ask some other questions.

a.) Where are you, please update your profile. [Too many out of country users]
b.) Are you near an Airport [After updating your profile]

Folks it does help, to have your profile updated, so we know where your from. State, Province, Country....thanks

This is some sort of pager-timing signal heard for a few seconds, it comes on and then off at about 4 to 5 second intervals- but keeps going... (413.5875). Then there is a beep-beep as a morse id type beacon on a continual basis at 409.85.

Then there is this 940.2625, this one reminds me of a trunked control station but runs in bursts, on and off.

Wondering if anyone has heard these in large cities and may know what they are. Thanks, Curfew.

 

[Curfew]

United States of America- Southeastern, a metro airport within the city.

 

[ecps92]

Ahhh..there we go. The Answer to the 413.5875 and 409.8500

You had us confised with Paging, what you are hearing is Telemetry.

413.5875 appears to be the new frequency for the former 413.6000 Mhz Data
409.8500 might be changing over the next year.

These frequencies are typically found in/around Airports. There have been a few reports as to the use, but they still remain questionable. They are either FAA or NOAA Telemetry. Either FAA Windshear monitoring or NWS IFLOWS, both telemetry which can be heard [frequencies vary] in/around many airports in the USA.



Also, Please update your profile, it does help when attempting to answer questions, we can base them on your area, state etc.

United States of America- Southeastern, a metro airport within the city.

 

[Curfew]

Many thanks, i was wondering what the stuff was. Strange how you can get a LTR ID on it on occasion, must be a false readout or something. Curfew

 

[Curfew]

Anyone know why im getting a LTR id on this as it's transmitting? On the 97's display the "R" number in the lower right corner of the display changed, once it was "R07" then on another transmission it was "R21". This was on the 413 frequency. Thanks.

 

[jerk]

Anyone know why im getting a LTR id on this as it's transmitting? On the 97's display the "R" number in the lower right corner of the display changed, once it was "R07" then on another transmission it was "R21". This was on the 413 frequency. Thanks.

413.xxx and 409.xx has a very strong possibility of being images. I get them in this range all the time in my local area.

It's worse on the Pro-2055, but it's also on my BCD396t, which sometimes give a false on Motorola or data thinking they are LTR systems. Happens, don't know why. Entering it and listening manually tells the Uniden has it wrong.