Dual Band Trucking.

[Jimbnks]

Very silly questions, is possible to set up trucking system that would have frequencies in both UHF and VHF bands?

If it is possible, how would it work for cross band talk group?

 

[n5ims]

Possible, but a single site would need all of its frequencies on a single band. While not exactly what you're asking (they use VHF and 700 MHz frequencies) this system (Alaska Land Mobile Radio (ALMR) Trunking System, Statewide, Alaska - Scanner Frequencies) uses different bands.

Talkgroups work just as they do on any multi-site system. If a radio on that talkgroup is affiliated with a site, that site would broadcast traffic on that talkgroup. It may be that a VHF radio is affiliated to a VHF site while a UHF radio is affiliated to a UHF site. In that case, the system would transmit traffic for that talkgroup on both VHF and UHF.

This would be no different if two sites on the same band (but using different frequencies) were used. Traffic on one site would use that site's frequencies and traffic on another site (even if it's the same talkgroup) would use a frequency on their site.

 

[mikewazowski]

A single physical site could use more than band.

However logically, they would have to be setup as distinct sites that the radio can distinguish apart.