What Signal is This?

The mothership?

In the USA, (217-219 MHz) this band is allocated to Govt. fixed land & mobile stations, satellite broadcasting, amateur/ham radio.

The band between 219-220 MHz, is for amateur mobile service.

Ground control to Major Tom?

It's a gamma ray burst, tin foil hat time....

Del looks decidedly miffed. I wouldn't be surprised if there was a plan being hatched under that tin foil hat of his!!

218 thousand MHz...or 218 MHz? Wait...I see the graphic...I'll just pay attention to that...._Anyway

Run the signal through a protocol analyzer so you can decode the secret codes.

Then you can be like John Travolta did in Phenomenom...wait...he died in that movie..._nevermind.

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Really, where are you located...generally. Is this a worldwide broadcast? Are you just picking up a SMPS or internal oscillator?

It is a digital radio multiplex group. I am located in Scotland.

DRg/DAB

Cool...

Yes, see

http://en.wikipedia.org/wiki/Digital_radio_in_the_United_Kingdom#DAB_frequency_plan

It used to be a VHF analog 405 line television band but was sold off by the government for DAB so they can sell off use of the AM and FM bands. DAB has the useful feature that you can cram in more and more stations while degrading the quality and upgrading the profit.