http://denver.cbslocal.com/2016/04/05/mountain-radio-station-signal-apparently-hacked/
Here we go again with somem schmucks schmucking about
Judging from the apparently senseless content of the hack we cannot think that these pirates had a "higher purpose".
Just some beer wasters taking advantage of the fact that they weren't aborted.
If the station's technical staff was unable to shut down the remote transmitter then someone didn't know what they were doing when they designed the system.
For example, amateur radio operators who operate remote repeaters are required to have a control link which does not operate on the input frequency of the repeater. Thus, jamming the repeater input can be overridden via the control link. The repeater I operated used a land line control connection and it came in handy more than once when we had lids on the system. (Lid is a derogatory descriptor for disruptive radio operators.)
For wired systems, a simple "keep alive" code can be used where the code is sent periodically over the link. If the remote doesn't receive a valid code in the allotted time then it shuts down. This prevents the remote transmitter from "free running" if the link is pirated or lost.
Neil
the FCC rules require the ability to remote control or shut off the carrier to the transmitter when something like this happens. i see some big fat fines coming to a few stations who did not have remote transmitter control capability.
I believe some of the effected stations were translators which I don't believe require remote capability.