Data Stream no Decode Ottawa Area

[mmisk]

Came across a data stream on 141.042 that looks like a P25 wave form.
Have not noticed this signal until now, and cannot obtain a decode using DSD.
Could others in the Ottawa area take a look please. Thanks!

 

[hunterca]

Came across a data stream on 141.042 that looks like a P25 wave form.
Have not noticed this signal until now, and cannot obtain a decode using DSD.
Could others in the Ottawa area take a look please. Thanks!

Are you sure of this frequency? I tried punching it in my scanners (SDS100 & BCD 325P2). It changes the frequency to 141.04375

 

[dave3825]

Got a signal here near NYC/Long Island. Looks like P25 but wont decode. Others have suggested a test pattern.

 

[mciupa]

@mmisk I was going to suggest something regarding the replacement for FleetNet, however your found frequency does not follow the 15 kHz spacing. Looks off a bit.
Try tuning around and see if you get a better decode.

 

[gary123]

6.25Khz step size. look for a Quebec user. As mciupa says it does not fit the Ontario band plans.

 

[mmisk]

It has been running all day and no decode. Just curious as I can decode all other control channels.
It is definitely on 141.042 as I tried it on a number of radios including an ICOM 2M.
Here is a sample:

Are you sure of this frequency? I tried punching it in my scanners (SDS100 & BCD 325P2). It changes the frequency to 141.04375

Yes, I tried receiving it on other receivers and the frequency is the same.
I am using a 2m antenna at about 60ft, in Ottawa south east end near 417 and Boundary Road.
The signal is not strong but should be a good decode compared to similar signals.
So, interesting anyway, something to do these days.

 

[hunterca]

It has been running all day and no decode. Just curious as I can decode all other control channels.
It is definitely on 141.042 as I tried it on a number of radios including an ICOM 2M.
Here is a sample:


Yes, I tried receiving it on other receivers and the frequency is the same.
I am using a 2m antenna at about 60ft, in Ottawa south east end near 417 and Boundary Road.
The signal is not strong but should be a good decode compared to similar signals.
So, interesting anyway, something to do these days.

I do not have SDR. I guess my Uniden scanners are useless on this site. No biggie

 

[dave3825]

@mmisk what program and version is that?

 

[mmisk]

@mmisk what program and version is that?

I was using the most resent version of Fastlane.
FMP and DSD combination.
I also tried Unitrunker however it could barely produce a readable signal.

 

[dave3825]

@mmisk what program and version is that?

I was using the most resent version of Fastlane.
FMP and DSD combination.
I also tried Unitrunker however it could barely produce a readable signal.

I meant the program in your attachment showing the freq on the spectrum. Is that sdr# or sdr++? And which version?

 

[mmisk]

I meant the program in your attachment showing the freq on the spectrum. Is that sdr# or sdr++? And which version?

View attachment 138264

@dave3825:

That is SDR# v.0.0.1275
Perhaps an older version but certainly does the job.

That signal on 141.042 must be a distant location, and 141.044 might be a little more accurate.
Strange there is no decode, as I can reliably decode other signals that have the same signal strength.
If it tune off frequency, then FMP automatically centers on 141.04675.

MM

 

[gary123]

Perhaps an audio capture? Different Control Channels have different sounds. Maybe someone will recognize the sound. Also you may want to link this thread into the Quebec forums.

 

[ATCTech]

With Pres. Biden coming to town next week that signal could be any number of temporary things.....

 

[mmisk]

Has anyone else able to receive 140.045 [or close to that frequency]
Wonder where it is?

 

[mciupa]

We have a listing for Criminal Intelligence Service Ontario :

140.040

M

C15 NAC

CISO F8 D

CISO F8 (OPP Sim 17D)

P25e

Law Talk

if that is close enough.

 

[ecps92]

With Pres. Biden coming to town next week that signal could be any number of temporary things.....

As to the US Secret Service, I tend to think they would be given a waiver to use the common 162-174 US Federal channels, vs creating something new for each country POTUS may visit.

Similar to the waivers that Foreign dignitaries get when visiting the US.

 

[ATCTech]

Nobody suggested that it may be a US agency. Canada does have Federal police and security agencies, plus there's inter-operability to consider.

 

[ecps92]

Nobody suggested that it may be a US agency. Canada does have Federal police and security agencies, plus there's inter-operability to consider.

You are the one who mentioned POTUS Just pointing out some information, as "WE" all speculate on what this may or may not be

 

[mmisk]

Here is a view using FMP24

It does sound like a P25 data stream, but no decode.

Fun to have something like this to play around with, will leave it on all day.

 

[mikewazowski]

I believe RENIR has a site with 141.045MHz.