In some cases, it is not enough to provide a broadcast frequency to describe a radio station. One must also know the sub channel. I propose two new properties:
{
"@context": "http://schema.org/",
"@type": "BroadcastService",
"broadcastFrequency": {
"@type": "BroadcastFrequencySpecification",
"broadcastFrequencyValue": "89.3",
"broadcastSignalModulation": "FM",
"broadcastSubChannel": "HD1"
}
}