[Spooks] XSL Question

[Utility World (Hugh Stegman)]

Agreed that the idler which goes "nosiree bob, nosiree bob, nosiree bob 
bob bob" is for sync and channel probes.  This waveform is only used in 
Japan and has stations of varying range on ~13 known frequencies.

The data segments (payloads) are obviously encrypted and usually they 
have the same chop-chop-chop as the idler (though not always).

The casinos seem to be replacing the machine which sounds like this with 
newer video based money eaters.  Future generations will not be able to 
hear something that sounds unsettlingly like Japanese secure 
communication every time they drop a quarter, or two, or three.

-hugh