794.559375MHz Ottawa

[alfonzo1955]

Does anybody know what 794.559375 in Ottawa is? I was searching around for frequencies when I got it. I am near Carleton University.

 

[DaveH]

What does it sound like, and when did you hear it? I'm not far from there myself,
not hearing anything at the moment.

Dave

 

[alfonzo1955]

Every second or so, there is a little burst of white noise. Every now and then, there are people talking. I have a PSR-310.

 

[Jay911]

With a frequency in that range, my first question is, are you using a GRE radio?

 

[alfonzo1955]

Sorry, my posts got moderated because I am "new".

 

[Jay911]

You're receiving an 'image' of an 800 MHz frequency. GRE radios receive false signals in the 794-799 MHz area of frequencies generally around 864-869 MHz.

 

[alfonzo1955]

What are images exactly? And is there any way to tell what frequency it is actually on?

 

[Jay911]

Image Frequencies - The RadioReference Wiki

There are quite a few threads about this issue.

http://forums.radioreference.com/te...6065-frequency-792-3625-around-nashville.html

http://forums.radioreference.com/massachusetts-radio-discussion-forum/234700-794-684375-a.html

http://forums.radioreference.com/illinois-radio-discussion-forum/232079-793-1875-a.html

http://forums.radioreference.com/sc...00-wont-accept-700mhz-channel-input-freq.html

http://forums.radioreference.com/wa...rum/230218-frequency-766-643750-question.html

The easiest way to figure out what frequency is actually in use is to listen to the ~866 MHz band simultaneously with another scanner and figure out what frequency you're hearing that way.

It's probably one of the Ottawa area trunk systems. Do you hear the telltale EDACS beeps at the end of transmissions?

 

[alfonzo1955]

I don't believe I hear beeps after the transmission. If I do, does that mean it is possible to listen to a trunked system using a conventional scanner?

 

[Forts]

I get images in the same area on my Pro-106 from the City of London's EDACS system. Was quite puzzled when I found an EDACS control channel in the 790's one day haha

 

[alfonzo1955]

I can't see any evidence that mine is a trunked system except for the white noise at regular intervals.

 

[VE3JSO]

i have seen that with the lambton edacs on my pro 106 as well i thought it was a new system at first