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Bizarre Buzzer tone

I live on the East Coast (US) and use my own radio setup, There are strong DRM Signals on 26010hz (Radio Maria) and 26060hz (Raiway Roma)
DRM is Digital Radio Monidale

Probably what you are hearing.
 
It may be site related, I'm not hearing it on my own equipment or on a couple of other websdr's i searched for and connected to. It may be some sort of site birdie.
 
Buzzer said:
Asylum, got the impression from you by your first post that you were picking up the pulse signal on an independent receiver. Can you explain "birdie"?
Click to expand...

Yes, I am a ham radio guy and have various receivers and various antennas, I live on top of a mountain and have quite the elevation. I also use my own SDR's to monitor various frequencies. The birdie I speak of could be an internal problem with the webSDR you were listening to. Sometimes if webSDR's are overloaded or transferring vast amounts of data to multiple users, they have have internal hardware issues that can cause a signal to show up on the spectrum, that signal is a birdie. Various electronic devices can cause birdies too, if you try to use a radio in close proximity to CAT5, almost every band will have a dead air signal that is called a birdie, if you de-energize the CAT5 cable, it will disappear from the receiving radio. Another couple of examples would be listeing to the 250-265mHz military satellite bands and the uplink and downlink satellite frequencies on 1-3gHz there are birdies every wheres.

See this link for a good definition and a better explanation than it seems I can offer :D
http://whatis.techtarget.com/definition/birdie
A birdie is a false, or phantom, signal that appears in a superheterodyne wireless receiver. Birdies are internally generated, resulting from the outputs of the oscillators that form part of the receiver circuit. They usually sound like unmodulated carriers -- signals with "dead air." Occasionally they are modulated by clicks, humming sounds, or audible tones.
Click to expand...
 
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