VHF receiver sites at airports
Technical question. In my limited experience the radio receivers are sited remotely from the control tower in order to minimise interference. My (probably silly) question is, how does the sound from the receivers reach the voice switch in the tower ? Is it automatically retransmitted on a discrete UHF frequency or is it simply underground copper or fibre-optic cables ? If the latter, are the cables in tunnels or simple conduits ? How are they accessed for maintenance ?
Genuine questions for a genuine interest folks. I'm not about to go on a wrecking rampage with a pick axe. Thankyou.