27.500.0MHz Cebu

I have noticed in two hotels the spec graph with 27.5mhz as the centre freq on one of the lower channels. Why would this be broadcast for all to see? I'm very interested in why!

Just stabbing in the dark and guessing the high spikes are people chatting using only 6khz wide carrier than the span of the graph is only around 1mhz (27-28mhz) ?

Maybe someone is a keep DXer and is watching for the band to open up? The spec is noticeable more noisy or more sensitive at the lower end of the band as the average noise level is higher.

Any extra info on this one please do leave a comment!